Mec 34-J Diesel Service & Parts Manual

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Service & Parts Manual

34-J Diesel

Art 5596

Serial Number Range

Part # 95325

14100000 - Up

December 2021

Table of Contents

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Do you have a question about the 34-J Diesel and is the answer not in the manual?

Questions and answers

Nick Clark

March 13, 2025

How do I get electric to the platform? MEC boom 34-j, without generator

1 comments:

Mr. Anderson

May 14, 2025

To provide electric power to the platform of a MEC 34-J Diesel boom lift without using a generator, use the Aux Power function available at the Upper Controls Station.

This answer is automatically generated

Summary of Contents for Mec 34-J Diesel

Page 1 Service & Parts Manual 34-J Diesel Art 5596 Serial Number Range Part # 95325 14100000 - Up December 2021...
Page 2 December 2021 Revision History Date Reason for Update May 2021 New Release MEC Aerial Work Platforms 1401 S. Madera Avenue, Kerman, CA 93630 USA Toll Free: 1-877-632-5438 Phone: 1-559-842-1500 Fax: 1-559-842-1520 info@MECawp.com www.MECawp.com Page 34-J Desel - Servce & Parts Manual...
Page 3: Table Of Contents
�� Section 1 - MEC Operator Policy �� MEC Operator Polcy �� ...
Page 4 December 2021 Battery Replacement �� 36 Section 12 - Controls �� ...
Page 5 December 2021 Can Bus Related Messages �� Calbraton Related Messages�� Interlock Messages ��...
Page 6 December 2021 Jb Cylnder Assembly �� Level Cylnder Assembly �� ...
Page 7: Chapter 1 - Service
All parts represented here are manufactured and supplied in accordance with MEC quality standards. We recommend that you use genuine MEC parts to ensure proper operation and reliable performance. To obtain maximum benefits from your MEC Aerial Work Platforms, always follow the proper operating and maintenance procedures.
Page 8: Section 1 - Mec Operator Policy
Any procedures not found within this manual must be evaluated by the individual to assure oneself that they are “proper and safe.” Your MEC Aerial Work Platform has been designed, built, and tested to provide many years of safe, dependable service. Only trained, authorized personnel should be allowed to operate or service the machine.
Page 9: Section 2 - Safety Symbols & General Safety Tips
Safety Symbols & General Safety Tips Safety Symbols & General Safety Tips MEC manuals and decals use symbols, colors and signal words to help you recognize important safety, operation and maintenance information. RED and the word DANGER – Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury��...
Page 10: Section 3 - Specifications
Meets applicable requirements of ANSI A92.20-2018. Allowable ambient temperature range: -20° F to 120° F (-29° C to 49°C). Consult with MEC for operation outside of this range. *Working Height adds 6 feet (2 m) to platform height. **Weight may increase with certain options.
Page 11: Section 4 - Torque Specifications
Secton 4 - Torque Specfcatons December 2021 Bolt Torque Specification - American Standard Bolt Torque Specification - American Standard Use the following values to apply torque unless a specific torque value is called out for the part being used. American Standard Cap Screws SAE Grade Cap Screw Torque...
Page 12: Bolt Torque SpecFCatOn - MetrC Standard
Secton 4 - Torque Specfcatons December 2021 Bolt Torque Specification - Metric Standard Use the following values to apply torque unless a specific torque value is called out for the part being used Metric Cap Screws Metric Grade 8�� 8 10��...
Page 13: HydraulC Components Torque Table
Secton 4 - Torque Specfcatons December 2021 Hydraulic Components Torque Table Note: Always lubricate threads with clean hydraulic fluid prior to installation. Use the following values to torque hydraulic components when a specific value is not available. Always check for torque values in the following places before relying on the Hydraulic Components Torque Table.
Page 14: Section 5 - Boom Support
Secton 5 - Boom Support December 2021 Boom Support Boom Support NEVER PERFORM WORK UNDER THE BOOM ASSEMBLY WITH THE PLATFORM ELEVATED WITHOUT FIRST SUPPORTING THE BOOM ASSEMBLY�� DO NOT work beneath the boom assembly with the platform elevated unless the boom assembly is properly supported.
Page 15: Section 6 - Hydraulic, Electrical & Total System
Secton 6 - Hydraulc, Electrcal & Total System December 2021 Hydraulic, Electrical and Total System Hydraulic, Electrical and Total System Hydraulic System HYDRAULIC FLUID UNDER PRESSURE CAN PENETRATE AND BURN SKIN, DAMAGE EYES, AND MAY CAUSE SERIOUS INJURY, BLINDNESS, AND EVEN DEATH�� CORRECT LEAKS IMMEDIATELY��...
Page 16: Section 7 - Primary Machine Components
Secton 7 - Prmary Machne Components December 2021 Primary Machine Components Primary Machine Components Controls Module Platform Platform Controls Swing Gate Base Controls Fuel Tank Hydraulic Tank Lift Gate Boom Engine Module Turn Table Engine Chassis Art_5712 Page 10 34-J Desel - Servce & Parts Manual...
Page 17: Emergency Systems And Procedures
Secton 8 - Emergency Systems and Procedures December 2021 Emergency Systems and Procedures Emergency Systems and Procedures IF THE CONTROL SYSTEM FAILS WHILE THE PLATFORM IS ELEVATED, HAVE AN EXPERIENCED OPERATOR USE THE EMERGENCY LOWERING PROCEDURE TO SAFELY LOWER THE PLATFORM�� DO NOT ATTEMPT TO CLIMB DOWN ELEVATING ASSEMBLY��...
Page 18 Secton 8 - Emergency Systems and Procedures December 2021 Auxiliary Power System & Test IF PRIMARY POWER FAILS WHILE THE PLATFORM IS ELEVATED, USE THE AUXILIARY POWER SYSTEM TO SAFELY LOWER THE PLATFORM�� DO NOT CLIMB DOWN THE BOOM ASSEMBLY OR EXIT THE PLATFORM WHILE ELEVATED��...
Page 19: LFt And Support The MachNe
Secton 9 - Transportng and Lftng Instructons December 2021 Lift and Support the Machine Lift and Support the Machine DEATH OR SERIOUS PERSONAL INJURY MAY RESULT FROM THE USE OF SUBSTANDARD LIFTING DEVICES AND/OR JACK STANDS�� ENSURE THAT ALL LIFTING DEVICES AND JACK STANDS ARE OF ADEQUATE CAPACITY AND IN GOOD WORKING CONDITION BEFORE USE��...
Page 20: TransportatOn InstructOns
MEC machinery�� Truck drivers are responsible for loading and securing machines, and should be properly trained and authorized to operate MEC machinery�� Drivers are also responsible for selecting the correct and appropriate trailer according to government regulations and company policy�� Drivers must ensure that the vehicle and chains are strong enough to hold the weight of the machine (see the serial number plate for machine weight)��...
Page 21: DrVNg Or WNchNg Onto Or Off Of A Transport VehCle
Secton 9 - Transportng and Lftng Instructons December 2021 Driving or Winching onto or off of a Transport Vehicle Before loading the machine, orient the turntable so that the platform is over the non-steering wheels. ONLY properly trained and qualified operators shall load and unload this machine��...
Page 22 Secton 9 - Transportng and Lftng Instructons December 2021 Securing to Truck or Trailer for Transport • Turn the key Selector Key Switch to OFF and remove the key before transport. • Turn the Battery Disconnect Switch to OFF before transport. •...
Page 23 Secton 9 - Transportng and Lftng Instructons December 2021 Loading Machine(s) CENTER OF GRAVITY Y-AXIS Art 5600 X- AXIS Center of Gravity X-Axis Y-Axis 34-J 43 in * 1085 mm * 26 in * 663 mm * * Distance From Center Of Non-steering Wheel Page 17 34-J Desel - Servce &...
Page 24: Section 10 - Hydraulic System
Secton 10 - Hydraulc System December 2021 Hydraulic System – General Hydraulic System – General The hydraulic system is designed to control all or part of machine functions by integrating various hydraulic cartridge valves into three manifolds to provide directional, pressure, flow, and load control. The hydraulic system is a feedback, load-sensing type.
Page 25 Secton 10 - Hydraulc System December 2021 Hydraulic Roadmap Hydraulic Reservoir • Hydraulic fluid is held in the reservoir for delivery to the pumps and is returned to the reservoir after use. Returning hydraulic fluid is routed through a filter before entering the reservoir. The reservoir also serves as the oil cooling device.
Page 26 Secton 10 - Hydraulc System December 2021 Platform Rotator • One rotary hydraulic actuator rotates the platform 90° either side of the centered position. Jib Cylinder • One hydraulic cylinder raises and lowers the jib. Auxiliary Power Unit • The Auxiliary Power Unit provides hydraulic fluid power to lower the platform in the event of engine failure or emergency.
Page 27: HydraulC FluD
FLUID LEAKS UNDER PRESSURE MAY NOT ALWAYS BE VISIBLE�� Fluid Recommendations MEC recommends only the use of the Chevron hydraulic fluids listed in the chart below, and each only in the operating temperatures listed in the chart. Do not substitute other fluids as pump damage may result, and use only the fluid appropriate to the ambient operating temperature.
Page 28 Secton 10 - Hydraulc System December 2021 complete cycles may be necessary to purge all air from Boom Lift and Boom Extend cylinder(s). When the above procedures have been completed, lower the platform and jib to the stowed position, and retract the boom completely then fill hydraulic reservoir to the full mark on sight gauge.
Page 29: HydraulC Pumps
Secton 10 - Hydraulc System December 2021 Hydraulic Pumps Note: Refer to Parts Section 25 - Hydraulics. An internal combustion engine drives the Drive and Functions Pumps. The Drive Pump is a variable displacement axial piston pump that provides hydraulic power to the Drive Motors.
Page 30 To prime the pump, loosen the output hose fittings at the hydraulic pumps to flood with hydraulic fluid. Tighten fittings. Drive Pump Service MEC does not recommend end-user maintenance or repair of the Drive Pump on the 34-J machines. Contact MEC or PMP for the nearest service provider. Functions Pump The Functions Pump is a fixed-displacement gear pump.
Page 31: HydraulC ManFolds
Secton 10 - Hydraulc System December 2021 Hydraulic Manifolds Note: Refer to Parts Section 25 - Hydraulics. This machine has three hydraulic valve manifolds: the Main Functions Manifold, and the Boom Functions Manifold. Additional hydraulic manifolds include the Brake and Steering junction blocks at the steering end of the chassis.
Page 32 Insert a 0-5000 psi gauge onto the appropriate pressure test port GP using gauge adapter fitting MEC part no. 50974. See next page for GP and Relief Valve location.
Page 33: AdjustNg RelEf Valves
Main Functions Manifold Relief Adjustment The Main Relief Valve should not require adjustments. If valve shows signs of tampering, replace the valve or call MEC Technical Support Department at 877-632-5438. Page 27 34-J Desel - Servce & Parts Manual...
Page 34: Wheel Motor Startup Procedure
Start the engine and allow it to run for one minute, then test the Drive Function for proper operation. Repair MEC does not recommend end-user maintenance or repair of the drive motors. Contact MEC for the nearest service provider or replacement. Page 28...
Page 35: General CylNder RepaR
Secton 10 - Hydraulc System December 2021 General Cylinder Repair WHEN REMOVING ANY HYDRAULIC CYLINDER, ENSURE THAT THE COMPONENTS IT SUPPORTS ARE THEMSELVES SECURELY SUPPORTED PRIOR TO BEGINNING ANY REMOVAL�� CYLINDERS ARE HEAVY�� SUPPORT CYLINDERS BEFORE REMOVING HARDWARE THAT SECURES THE CYLINDER TO THE MACHINE�� Return to Tank Piston Seals...
Page 36 Secton 10 - Hydraulc System December 2021 Drain all fluid from cylinder. Clean all dirt and grit from outside of cylinder. Insert cylinder into vise. DO NOT overtighten the vise�� Overtightening may damage the cylinder�� Cylinder Disassembly Remove solenoid valves or counterbalance valves, if the cylinder is equipped with them. Remove the head from the cylinder body.
Page 37 Secton 10 - Hydraulc System December 2021 Place a small amount of fluid on the inside seals of the piston. Reinstall the piston on the shaft by slowly twisting the piston onto the threads of the shaft. Be very careful not to damage the inside seals.
Page 38 Secton 11 - Electrcal System December 2021 Electrical System - General Electrical System - General The electrical control system consists of lower controls located on the machine base and upper controls located on the machine platform. Emergency lowering controls are located at each control station.
Page 39 Secton 11 - Electrcal System December 2021 Note: The Auxiliary Power switch serves as an enable switch. It is not necessary to use the primary function enable switch. Diagnostic LED & EZ-Cal Diagnostic Tool If the machine fails to operate, inspect the GP500 Module located inside the control box. The LED located on the processor should be ON.
Page 40 Secton 11 - Electrcal System December 2021 Batteries Discharged batteries can freeze, causing damage to the battery and/or battery case�� A broken battery case will allow electrolyte to leak out�� BATTERIES UNDER CHARGE CREATE EXPLOSIVE HYDROGEN GAS�� KEEP SPARKS, FLAMES AND SMOKING MATERIALS AWAY FROM BATTERIES��...
Page 41 Secton 11 - Electrcal System December 2021 Battery Maintenance (In Use) Check battery and surrounding area for signs of damage or corrosion. Check battery terminals for: • Corrosion: Regularly clean connections and apply a nonmetallic grease or protective spray to retard corrosion.
Page 42: Battery Replacement
Secton 11 - Electrcal System December 2021 Battery Replacement TURN OFF THE BATTERY DISCONNECT SWITCH BEFORE REMOVING ANY BATTERY FROM THE MACHINE�� Prevent damage to the battery and/or electrical system; • Always disconnect the negative battery cable first�� • Always connect the positive battery cable first�� To Remove A Battery: Turn the Battery Disconnect switch to OFF.
Page 43: Lower Controls
Secton 12 - Controls December 2021 Lower Controls Lower Controls ART_4824 ALWAYS check over, under and around the machine for personnel, structures and obstructions before activating any control function and continue to watch for hazards while operating the machine�� Control Description Hour Meter Indicates total elapsed time of machine operation.
Page 44 Secton 12 - Controls December 2021 When this red light is illuminated, the starter circuit is temporarily disabled. The starter Starter Time-out circuit times out if the starter is run continuously for 15 seconds without the engine Indicator starting. The starter functions resets after approximately 30 seconds. Functions as Engine ECU Fault Code indicator.
Page 45: Platform Controls
Secton 12 - Controls December 2021 Platform Controls ART_5589 ALWAYS check over, under and around the machine for personnel, structures and obstructions before activating any control function and continue to watch for hazards while operating the machine�� Control Description Horn Button Press to sound warning horn.
Page 46 Secton 12 - Controls December 2021 When the PPSS first senses an object overhead it activates an intermittent audible alarm. Warn Only The frequency of this alarm increases as the object comes closer to the sensors. Pay careful attention to the object the sensors have detected. PPSS Switch (Optional) If selected, the machine will stop when the warning alarm becomes...
Page 47 Secton 13 - Sensors, Relays & Alarms December 2021 Sensors Sensors CAN-Tilt 161 CAN-Tilt 163 EZ-Fit Angle Sensor (Inside Boom) Draw Wire Transducer Pressure Transducer (Inside Boom) ART_5719 Pressure Transducer There is one pressure transducer installed onto the lift cylinder. The pressure transducer senses the weight of the platform contents and stops operation of the machine if the platform is overloaded.
Page 48 Secton 13 - Sensors, Relays & Alarms December 2021 EZfit Angle Sensors There is one dual EZfit Angle Sensor. It is located at the base of the main boom. The EZfit Angle Sensor measure the absolute angle of the boom sections relative to level. Draw Wire Transducer The draw wire transducer detects the length of the boom.
Page 49: Relays
Secton 13 - Sensors, Relays & Alarms December 2021 Relays Start Throttle Glow/Choke Art_5731 Engine Relays The Engine Relays are located beside the engine on the rear wall of the Engine Module. These relays reduce the current flow supplied by the GP500 Control Module. Refer to the Section 20 - Schematics for relay functions and interconnect.
Page 50: Alarms
Secton 13 - Sensors, Relays & Alarms December 2021 Alarms Tilt Alarm The Tilt Alarm is a dual-tone alarm that sounds at the Base Controls Box when the angle of the platform is outside of acceptable levels of operation (as measured by the GP500 inside the Base Controls).
Page 51: Deutsch Connectors
Deutsch Connectors Deutsch Connectors Deutsch connectors used on MEC equipment are designed so that individual parts may be replaced without replacing the entire component. Special tools and detailed instructions are provided in Deutsch Connector field kits, MEC part no. 84091.
Page 52: ContNuTy Checks
Secton 15 - Contnuty Checks December 2021 Continuity Checks Continuity Checks Selector Switch – On-Off • Disconnect wires. Normally Normally • Connect first probe of ohm meter to common terminal. Open Closed • Connect second probe to any normally open terminal. •...
Page 53 Secton 15 - Contnuty Checks December 2021 Toggle Momentary Switch • Disconnect wires. Normally Open • Connect first probe of ohm meter to common terminal. Common Normally Open Test top position • Connect second probe to top normally open terminal. Normally Open •...
Page 54 Secton 16 - Control System December 2021 Control System Control System The GP500 Control System uses a variety of components and sensors to maintain proper and safe operation of the machine. This machine may be sold into many different countries that require a variety of monitoring equipment.
Page 55: Gp500 CalBratOn
Secton 16 - Control System December 2021 GP500 Calibration GP440 Module P1 P2 Upper Controls EZ-Cal Port EZ-Cal port on bottom, facing down GP440 ART_4891 Module The GP500 processor relies on angle level and extension sensor(s) to monitor platform position at all times.
Page 56: Gp500 CalBratOn Procedure
The following procedures and additional tasks detailed in Section 19 - Troubleshooting can only be performed using an EZ-Cal scan tool or on-board diagnostic display. If you do not have an EZ-Cal, please contact MEC to obtain one. Calibrator GP500 Control Module...
Page 57 Secton 16 - Control System December 2021 Pre-Calibration Setup Park the machine on an absolute flat and level surface free from overhead obstructions that will prevent full boom elevation and extension. Lower and retract the boom completely into its cradle. Level Sensors calibration must be performed first.
Page 58 Secton 16 - Control System December 2021 Press the right arrow once until the display reads “CALIBRATE HEIGHT”. Press ENTER. You will be asked if the boom is fully lowered. Press ENTER when it is. Follow the instructions on the display exactly and operate lift and lower only when the display instructs to do so.
Page 59 Secton 16 - Control System December 2021 extension so the site must be free of overhead and forward obstructions. Lower the boom completely and lower the Jib to the ground. It may be necessary to raise the Jib slightly to ensure full boom retraction. Turn the Key Switch to the Lower Controls position and start the engine.
Page 60 Secton 16 - Control System December 2021 Loaded Load Calibration The EZ-Cal will display ‘REDO LOADED NO’ press the UP arrow once to change NO to YES and press ENTER. When the EZ-Cal displays “PLEASE LIFT”, press the Enable Toggle up to the Rabbit position (high throttle) while also operating the Boom Lift and Boom Extend toggle switches simultaneously to lift and telescope boom to full cylinder stroke.
Page 61: FaLure Messages
Secton 17 - Calbraton Troubleshootng December 2021 Failure Messages Failure Messages Various problems can be detected by the EZ-Cal that prevent successful calibration. These problems are reported with a flashing message including an “F” code. The following descriptions are helpful in solving the problem.
Page 62 Secton 17 - Calbraton Troubleshootng December 2021 F10:BAD HEIGHT1 F10:BAD HEIGHT2 • This message is given if the height sensor output (P8-2) is out of range at the end of the DYNAMIC lift. The height sensor output must be between 1.0V and 4.0V. Check DIAGNOSTICS/ SENSORS to see the output.
Page 63 • This message occurs if too many static measurements are taken during a calibration step. • In the rare event that this occurs, please call MEC for assistance. F27:BAD HEIGHT • This message indicates a problem with the height sensor output (P8-2) during the STATIC calibration phases.
Page 64 Secton 17 - Calbraton Troubleshootng December 2021 when a 3000psi one is needed). • Check CALIBRATIONS / HEIGHT CALS; the “Height” indicates the first height at which there was insufficient difference and the “Up” and “Down” values show the loaded pressure (first) and the difference between loaded and empty pressure (second).
Page 65 Secton 17 - Calbraton Troubleshootng December 2021 F52:NOT CALIBRATED • This message is a catch-all code which indicates an improper calibration sequence or that one of the phases of calibration was not completed. The skipped phase must be completed or the calibration sequence must be passed through in proper sequence before this message will clear.
Page 66: InformatOn Messages
Secton 17 - Calbraton Troubleshootng December 2021 Information Messages During calibration the following messages will be displayed. They are informational prompts only and do not indicate a failure. BUILDING TABLES • This message indicates that the STATIC measurements are being used to build calibration data - the process should take no more than 5s.
Page 67 Secton 17 - Calbraton Troubleshootng December 2021 MEASURING # • This message is displayed when the platform is stopped during either STATIC phase, when the GP500 takes a measurement. • There will be a short delay while the machine is allowed to stabilize after movement is stopped. MUST GO DOWN! •...
Page 68 Secton 17 - Calbraton Troubleshootng December 2021 REDO EMPTY: • This message is displayed if the EMPTY phase of load calibration has previously been completed. • Press ENTER when “NO” is displayed if there is no need to redo the EMPTY phase. •...
Page 69 The Overload Event Counter indicates the number of times that the platform has been emergency lowered during an overload event. MEC Aerials uses the Start Disable Light, located on the lower control panel, and the Overload Indicator light in the upper control station to flash after the emergency Lower operation was activated during an overload event.
Page 70: MechanCal Components
OF THE EQUIPMENT�� ON MACHINES WHERE FOAM FILLED TIRES WERE FITTED AS ORIGINAL EQUIPMENT, TIRES MUST BE REPLACED WITH EQUIVALENT SPECIFICATION TIRES AND FOAM-FILL WEIGHT�� CONTACT MEC SERVICE�� Changing Tires Refer to “Lift and Support The Machine” in Section 9 - Transporting and Lifting Instructions for instructions and safety precautions.
Page 71: Nordlock Washers
Secton 18 - Mechancal Components December 2021 Nordlock Washers Nordlock-style lock washers are used in many places on this machine. These twopiece washers have a ramped surface in the center and a splined outer surface. Since the angle of the ramps is larger than the angle of a bolt’s thread, and since the splined surfaces grip the material around them, these washers provide excellent bolt-holding capabilities.
Page 72 Secton 18 - Mechancal Components December 2021 Platform Removal & Installation THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 73 Secton 18 - Mechancal Components December 2021 Platform Rotator THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT�� The Platform Rotator is located between the Platform and the Jib.
Page 74 Secton 18 - Mechancal Components December 2021 Assembly Assembly is reverse of disassembly. Examine all pins for signs of wear, surface imperfections, cracks or gray dust in the pivot area. Replace as necessary. Tighten all fasteners to proper torque as shown below. Refer to Section 4 - Torque Specifications of this manual for torque specifications of fasteners not listed below.
Page 75: JB CylNder/JB Components
Secton 18 - Mechancal Components December 2021 Jib Cylinder/Jib Components THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 76 Secton 18 - Mechancal Components December 2021 Remove the bolts that secure the Jib Cylinder pin to the jib. Support the end of the Jib Cylinder, then remove the pin. ART_4910 Swing the Jib Cylinder out as shown. ART_4911 Remove bolt and pin retainer for the lower pin at the front lower pivot point of the bell crank weldment.
Page 77 Secton 18 - Mechancal Components December 2021 Assembly Assembly is reverse of disassembly. Examine all pins for signs of wear, surface imperfections, cracks or gray dust in the pivot area. Replace as necessary. Re-connect the hydraulic lines after the barrel end of the Jib Cylinder is secured. Use the Jib Lift/ Lower function to extend or retract the cylinder to proper length for assembly.
Page 78 Secton 18 - Mechancal Components December 2021 Platform Level Cylinder THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 79 Secton 18 - Mechancal Components December 2021 Use the Jib Extend/ Retract function to retract the boom away from the Platform/Jib Assembly. IMPORTANT! Be sure the plates that secure the Platform Level Cylinder pin are exposed. Disconnect the hydraulic hoses that supply the Platform Level Cylinder.
Page 80: Boom Extend CylNder
Secton 18 - Mechancal Components December 2021 Boom Extend Cylinder THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 81 Secton 18 - Mechancal Components December 2021 Wrap a sling around the cylinder base, then pull the end of the cylinder approximately 5 feet (1.5 m) out of the boom. Be careful as the end of the cylinder comes out through the access hole. ART_5724 Attach a sling to the cylinder barrel and apply slight lifting pressure with a forklift or overhead crane.
Page 82: Boom LFt CylNder/Boom LNkage
Secton 18 - Mechancal Components December 2021 Boom Lift Cylinder/Boom Linkage THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 83 Secton 18 - Mechancal Components December 2021 Main Boom Assembly Rig slings and a spreader bar from the Main Boom Block Assembly to an overhead hoist as shown. Apply slight lifting pressure. ART_5708 Place a 4x4 inch (10x10 cm) block between the Lift Cylinder and Lower Boom as shown.
Page 84 Secton 18 - Mechancal Components December 2021 Assembly Assembly is reverse of disassembly. Examine all pins for signs of wear, surface imperfections, cracks or gray dust in the pivot area. Replace as necessary. Refer to Section 4 - Torque Specifications of this manual for torque specifications of fasteners. Page 78 34-J Desel - Servce &...
Page 85: MaN Boom Assembly
Secton 18 - Mechancal Components December 2021 Main Boom Assembly THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 86 Secton 18 - Mechancal Components December 2021 Assembly The boom must be properly shimmed to function correctly. Each boom section must be shimmed to a clearance no greater than 0.030” (0.762mm) at its tightest point of travel. It may be necessary to run each boom section in and out several times to properly identify the tightest point of travel, and to adjust the number of shims.
Page 87 Secton 18 - Mechancal Components December 2021 Use an overhead hoist of forklift to position the End Section of the boom in front of the Base Section. Base Section With wearpads and shims in place, insert the End Section into the Base Section of the boom. End Section Keeping the sections as parallel as possible, slide the External...
Page 88 Secton 18 - Mechancal Components December 2021 Swing Bearing/Turntable Components THIS PROCESS REQUIRES SPECIFIC REPAIR SKILLS AND EXPERIENCE, APPROPRIATE LIFTING EQUIPMENT AND A PROPER WORKPLACE�� DEATH, SERIOUS INJURY OR SIGNIFICANT MACHINE DAMAGE COULD OCCUR IF YOU ATTEMPT THIS PROCESS WITHOUT THE APPROPRIATE SKILLS AND EQUIPMENT��...
Page 89 Remove the bolts and washers holding the Turntable Assembly to the Swing Bearing. ART_5728 THE WASHERS USED ON THESE BOLTS ARE HARDENED STRUCTURAL WASHERS�� REPLACE LOST OR DAMAGED WASHERS WITH MEC PART #50582 ONLY�� Page 83 34-J Desel - Servce & Parts Manual...
Page 90 Secton 18 - Mechancal Components December 2021 Carefully apply lifting pressure. Check the balance of the load before lifting and adjust the rigging as necessary. Lift the Turntable Assembly off the Chassis. Note: Turntable Mass with Counterweight removed: 3565 LBS 1620 KG ART_5729 SPACER...
Page 91 Remove the bolts and washers holding the Swing Bearing to the Chassis. THE WASHERS USED ON THESE BOLTS ARE HARDENED STRUCTURAL WASHERS�� REPLACE LOST OR DAMAGED WASHERS WITH MEC PART #50582 ONLY�� Remove the Swing Bearing and ring spacers from the Chassis. Note: Ring Bearing Mass: ART_4948...
Page 92 Secton 18 - Mechancal Components December 2021 Use an alternating criss-cross pattern to tighten the bolts securing the Swing Bearing to the chassis. Tighten the bolts in three stages. Tighten to 50 lb/ft (68 Nm) on the first pass. Tighten to 100 lb/ft (136 Nm) on the second pass. Tighten to 180 lb/ft (244 Nm) on the first pass.
Page 93: DrVe Motors & Gear Hubs
Secton 18 - Mechancal Components December 2021 Drive Motors & Gear Hubs Note: See Section 24 - Axles & Section 25 - Hydraulics of the Parts portion of this manual for parts lists. There is one hydraulic drive wheel motor and one gear hub located at each wheel. Clean all fittings before disconnecting hoses��...
Page 94 O-ring is installed correctly. Art_5783 Use grease to hold the O-ring in place during installation. Drive Motors MEC does not recommend end-user maintenance or repair of the drive motors. Contact MEC or for the nearest service provider. Gear Hubs Lubrication •...
Page 95: EngNe MaNtenance
Secton 18 - Mechancal Components December 2021 Engine Maintenance For complete service information consult the engine manual that came with the machine. Always wear protective eye-wear when working with fuel and oil�� Engine should be OFF when replacing filter elements�� Do not run the engine with the air filter element removed��...
Page 96 Secton 18 - Mechancal Components December 2021 Out to Fuel Fuel Filter Pump Turn OFF valve on bottom of fuel tank and clean the filter area before removing the filter. Place a suitable container beneath the fuel In From filter assembly to catch spilled fuel. Fuel Fuel Filter Tank...
Page 97: Section 11 - Electrical System
Secton 18 - Mechancal Components December 2021 Throttle Solenoid Adjustment IMPORTANT! This final adjustment must be made after all other throttle speed adjustments. The solenoid must be free to retract fully in order to turn OFF the High Amperage Pull Circuit.
Page 98: LubrCatOn PoNts
Secton 18 - Mechancal Components December 2021 Lubrication Points Boom Wear Pads With the boom in the stowed position, raise the jib and extend the boom completely. Spread a thin, even coat of lithium-based grease on the areas where the wear pads rub -- top, bottom and sides of the internal sections of the boom.
Page 99: General TroubleshootNg TPs
Hydraulic fluid contaminated with debris - filter change interval neglected. Note: MEC uses a multiple viscosity fluid that is light enough for cold climates and resists thinning in warm climates. Use only the recommended hydraulic fluid. Substituting a lower grade fluid will cause the machine to operate incorrectly and may lead to pump and drive motor failure.
Page 100: ElectrCal System TroubleshootNg
Secton 19 - Troubleshootng December 2021 Electrical System Troubleshooting The electronic control system used on this machine was designed for low maintenance and long, trouble-free operation. The system consists of two microprocessor based modules: the GP440 Module in the upper controls box and the GP500 Processor, located in the lower controls box. They communicate through a low voltage digital signal called CAN-Bus communication.
Page 101: Gp500 Module
Secton 19 - Troubleshootng December 2021 GP500 Module The GP500 module is “the brains” of the system. It receives and processes a variety of inputs both from the machine and the operator, then controls all the operative functions of the machine. It also has a feature that allows the technician to access and monitor all functionality of the system, along with a technician-friendly series of fault messages that can be accessed through the use of the onboard EZ-Cal scan tool.
Page 102 Secton 19 - Troubleshootng December 2021 Terminal Block Module Terminal Block Module (TBM) The Terminal Block Module (TBM) is a module inside the lower control box that provides terminal point connections for both positive and ground circuits. A signal from the Emergency Stop circuit activates a load-reduction relay within the TBM that provides ample power to the B+ (positive) terminal strip.
Page 103 Secton 19 - Troubleshootng December 2021 GP440 Module The GP440 Module is the remote module located inside the upper control box. It receives inputs from the operator and relays them to the GP500. TILT ALARM JIB (UP/DOWN) P5-2 P6-1 12 V SUPPLY PLATFORM ROTATE (RIGHT/LEFT) P5-3 P6-2...
Page 104: Ez-Cal Scan Tools
Handheld P1 P2 Scan Tool P/N 90888 The handheld EZ-Cal is not provided with the machine and is available from the MEC parts department (part #90888). Upper Controls To use and operate the handheld EZ-Cal at the upper controls station: •...
Page 105: UsNg The Ez-Cal WTh The Flow Charts
ACCESS LEVEL 1 PROVIDES ACCESS TO CHANGE PERSONALITIES NORMALLY PRESET AT THE FACTORY TO PROVIDE PROPER MACHINE MOVEMENT AT SAFE SPEEDS�� PERSONALITIES MUST NOT BE CHANGED WITHOUT PRIOR AUTHORIZATION FROM MEC AND MAY ONLY BE RETURNED TO FACTORY SPECIFICATION AS LISTED IN THE FOLLOWING TABLES��...
Page 106 SENSING OPTION 10 SEC SAFE DOWN ONLY 0.30S 5F-6 FROM 5E-7 5C-7 LD DELAY SAMPLES MAX DRIVE 1.15 SEC MEC AERIALS DELAY 101% 1.0S 5F-7 5F-8 5C-8 5E-8 HIGHT BASE HEIGHT MAX SLOW DOWN OIL CUTOFF 40 deg C RISER...
Page 107 Secton 19 - Troubleshootng December 2021 34JD BOOM EZ-Cal Flow Chart DIAGNOSTIC EZ-CAL MENU Chart 2 of 2 SYMBOL KEY FUNCTIONS ESC/ENTER BUTTONS To move back and forth between Menu and sub-menu DIAGNOSTICS LEFT/RIGHT BUTTONS Select menus and setting to be adjusted ENTER UP/DOWN BUTTONS Adjust setting values...
Page 108: Ez-Cal Messages
Secton 19 - Troubleshootng December 2021 EZ-Cal Messages “Help Messages” will appear on the EZ-Cal scan tool as a means of explaining operating and non- operating function(s) and system errors or interruptions that are accompanied by flash codes. It can also be used for verifying system operation.
Page 109: Can Bus Related Messages
Secton 19 - Troubleshootng December 2021 Can Bus Related Messages CAN bus communication system is the network by which the control modules and CAN Tilt modules communicate with the GP500. NO DATA FROM CAN TILT #1______________________ Flash Code: None • CAN Tilt module mounted to front of main boom (located behind panel, Left Module) has malfunctioned or wiring is damaged.
Page 110: CalBratOn Related Messages
Secton 19 - Troubleshootng December 2021 Calibration Related Messages The following messages appear when the GP500 microprocessor has not been calibrated or was improperly calibrated. FACTORY OVERRIDE_________________________________ FAST FLASH • GP500 is shipped in this condition to allow temporary operation of the machine without interruption from the safety system so that calibration procedures can be performed.
Page 111: Interlock Messages
Secton 19 - Troubleshootng December 2021 Interlock Messages The following messages appear as result of perceived improper operation, machine positioning, or other incorrect operation. Interlock messages may be the result of a part failure if the part in question provides incorrect information to the GP500. FUNCTIONS LOCKED - LIMIT REACHED________________ Flash Code: 2/2 •...
Page 112 Secton 19 - Troubleshootng December 2021 CHECK PLATFORM SWITCHES_______________________ Flash Code 2/2 • Platform Rotate/slide joystick or toggle switch movement without enable or during power up. Check joystick analog output and switch digital outputs using the EZ-Cal. CHECK TELE SWITCHES_____________________________ Flash Code 2/2 •...
Page 113: Other Messages
Secton 19 - Troubleshootng December 2021 Other Messages The following messages are the result of various possible failures or occurrences which may result in machine interruption. FUNCTIONS LOCKED - NO VALVE SUPPLY!____________ Flash Code 2/3 • GP500 detects no power on P7-1 of the GP500. Check wiring to plug connection; possible GP500 internal failure.
Page 114 Secton 19 - Troubleshootng December 2021 FAULT: CHECK HEIGHT SENSORS!____________________ Flash Code 6/1 • Voltage from Height sensors out of range, should be .5 volts to 4.5 volts FAULT: CHECK PRESSURE SENSOR!___________________ Flash Code 6/2 • Voltage from Pressure sensor out of range, should be .5 to 4.5 volts (Overload option only). FAULT: CHECK ELEVATION SWITCH!___________________ Flash Code 6/3 •...
Page 115: TroubleshootNg Chart
Secton 19 - Troubleshootng December 2021 Troubleshooting Chart The following chart describes the possible causes for inoperation of the different functions of this machine. The Causes and Solutions columns list various points of references that can be found in the Hydraulic, Electrical, Schematics and Troubleshooting sections of this manual.
Page 116 Secton 19 - Troubleshootng December 2021 Problem Possible Cause Remedy/Solution Engine Related Issues Indicates an attempt to start was 7-7 Flash code on GP500 sent by the GP500 but the oil Check all the above pressure switch did not close. Low fuel reservoir Check/fill fuel reservoir.
Page 117 Secton 19 - Troubleshootng December 2021 Problem Possible Cause Remedy/Solution Boom Extend/Retract Excessive weight on platform Reduce weight to within platform capacity Level sensor out of level (platform Indicator light will be illuminated and alarm will sound off. elevated above 10’) Reposition machine to level ground Main relief valve (25) out of Adjust Main relief valve (25) to rated platform capacity located on function...
Page 118 Refer to Adjustments Flow Chart column 4G for settings that will allow lowering platform (level Adjustments in GP500 incorrect leveling to be close then make slight changes until operating correctly. cylinder moving too slow Contact MEC Technical Support for assistance if needed. or fast) Pump faulty Test/replace pump Problem...
Page 119 Secton 19 - Troubleshootng December 2021 Problem Possible Cause Remedy/Solution Drive Check bypass plates located in the center of each planetary hub. Should Planetary hub bypass engaged be convex. Turn over if not. No drive operation System interlock Check EZ-Cal HELP messages for interlock Hydraulic oil incorrect for severe Use hydraulic tank warmer if equipped.
Page 120 Secton 19 - Troubleshootng December 2021 Problem Possible Cause Remedy/Solution Steer Check continuity through micro-switch inside joystick handle using wires Joystick rocker switch inoperative outside the handle. Check output (see EZ-Cal 2D2, P10-7 and P7-8). Check steering valve for power. Check for damage and contamination. Steering valve 11 inoperative Check output from GP500 (see EZ-Cal ID # 2F1 P5-2 and P5-3).
Page 121: ElectrCal SchematC - Lower Schemat
Secton 20 - Schematcs December 2021 Electrical Schematic - Lower Schematic Electrical Schematic - Lower Schematic TO TURNTABLE SCHEMATIC PAGE 2 GP 500 MICORPROCESSOR (414) (15) P1-1 CAN-BUS HI (95) (413) P1-2 CAN-BUS LO (412) (96) P1-3 GROUND (414) (33) P2-1 CAN-BUS HI (413)
Page 122: ElectrCal SchematC - Turntable
Secton 20 - Schematcs December 2021 Electrical Schematic - Turntable (143) (43) (15) (15) (G BUS) ORG/BLK (15) (15) (33) BOOM (95) MANIFOLD (15) (96) WHT/BLK LEVEL UP BLK/WHT (33) LEVEL DOWN (216) JIB UP BLU/WHT (15) (217) JIB DOWN BLU/BLK (118) (130)
Page 123: ElectrCal SchematC - Upper Controls
Secton 20 - Schematcs December 2021 Electrical Schematic - Upper Controls TO TURNTABLE SCHEMATIC PAGE 2 GP 440 MICORPROCESSOR EMPTY EMPTY EMPTY OVERLOAD S4-1 (OPTION) S4-2 100µF MISC. 25Vdc S4-3 (074) S4-4 (074) PP4-1 RED LAMP-OVERLOAD INDICATOR ALARM (015) PP5-1 YELLOW LAMP-LOW FUEL INDICATOR TILT (417)
Page 124: HydraulC Schemat
Secton 20 - Schematcs December 2021 Hydraulic Schematic Page 118 34-J Desel - Servce & Parts Manual...
Page 125: MaN ManFold Valves
Secton 20 - Schematcs December 2021 Main Manifold Valves 20.3 22.3 22.2 21.2 21.1 21.3 22.1 20.1 20.2 34JD MAIN MANIFOLD ITEM NO. DESCRIPTION QTY. FUNCTION 2.1, 2.2 Prevents back flow: 2.1 for Emergency Pump efeciency. 2.2 for platform manifold. CHECK VALVE SHUTTLE VALVE Pilot control shuttle to route pilot hyd to Flow Regulator valve 4...
Page 126 December 2021 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK Page 120 34-J Desel - Servce & Parts Manual...
Page 127: Chapter 2 - Parts
This Parts sections consists of illustrated parts sections and is designed to provide you, the customer, with illustrations and the list of associated parts needed to properly maintain the MEC self-propelled aerial work platform. When used in conjunction with the Service section in this manual and the Operator’s Manual (provided separately), this manual will assist you in making necessary adjustments...
Page 128: Upper Controls Box WTh Ppss, Part
Secton 21 - Controls December 2021 Upper Controls Box Without PPSS, Part 1 Horn Drive Speed Overload (opt) Hi-Cap Indicator (opt) Tilt Hi-Cap Switch (opt) Low Fuel Idle Speed Generator (opt) Emergency Stop Glow Plug Engine Start/Stop Function Enable Aux Power Platform Level Decals Upper Controls...
Page 129 Secton 21 - Controls December 2021 Item Part Number Description Qty�� 94685 Boom Control Handle 94686 Platform Control Handle 94687 Drive Control Handle 28581 Palm Rest 7423 Switch, 2 Position Momentary 92422 Enable Button 92427 Switch, 3 Position, Single Momentary 92408 Emergency Stop Button 6234...
Page 130 Secton 21 - Controls December 2021 Upper Controls Box Without PPSS, Part 2 Upper Controls 60-J Diesel ART_4841 Page 124 34-J Desel - Servce & Parts Manual...
Page 131 Secton 21 - Controls December 2021 Item Part Number Description Qty�� 28781 Upper Controls Enclosure 90714 Switch Base 8082 Contact Block, Normally Closed 8083 Contact Block, Normally Open 28779 Bracket 50191 THMS #10-32X00.50 ZP 92027 GP440 Module 50330 THMS #10-32X01.00 ZN Phillips (Not Shown) 50238 NNYL #10-32 05 Z (Not Shown) 92033...
Page 132 Secton 21 - Controls December 2021 Upper Controls Box With PPSS, Part 1 PPSS Selector Switch Drive Speed Overload (opt) Hi-Cap Indicator (opt) Tilt Hi-Cap Switch (opt) Low Fuel Idle Speed Generator (opt) Emergency Stop Glow Plug Engine Start/Stop Horn Aux Power Platform Level Decal...
Page 133 Secton 21 - Controls December 2021 Item Part Number Description Qty�� 94685 Boom Control Handle 94686 Platform Control Handle 94687 Drive Control Handle 28581 Palm Rest 7423 Switch, 2 Position Momentary 91534 Horn Button 92427 Switch, 3 Position, Single Momentary 92408 Emergency Stop Button 6234...
Page 134 Secton 21 - Controls December 2021 Upper Controls Box With PPSS, Part 2 Upper Controls 60-J Diesel ART_4841 Page 128 34-J Desel - Servce & Parts Manual...
Page 135 Secton 21 - Controls December 2021 Item Part Number Description Qty�� 28781 Upper Controls Enclosure 90714 Switch Base 8083 Contact Block, Normally Closed 8083 Contact Block, Normally Open 28779 Bracket 50191 THMS #10-32X00.50 ZP 92027 GP440 Module 50330 THMS #10-32X01.00 ZN Phillips (Not Shown) 50238 NNYL #10-32 05 Z (Not Shown) 92033...
Page 136: Lower Controls
Secton 21 - Controls December 2021 Lower Controls Lower Controls 34-J Diesel ART_4842 Page 130 34-J Desel - Servce & Parts Manual...
Page 137 Secton 21 - Controls December 2021 Item Part Number Description Qty�� 91704 Hour Meter 9549 Key Switch 7423 Switch, 2 Position Momentary 7235 Circuit Breaker 91954 Switch, 3 Position Momentary 92253 Light, Amber 92254 Light, Red 7800 Emergency Stop Button 95222 GP500 Module 91838...
Page 138: Platform Assembly, 6 Foot
Secton 22 - Platform December 2021 Platform Assembly, 6 Foot Platform Assembly, 6 Foot SEE NEXT PAGE FOR DETAILED VIEWS OF A, B & C ILLUSTRATION No. 34-J Platform Assembly Art_5704 Page 132 34-J Desel - Servce & Parts Manual...
Page 139 Secton 22 - Platform December 2021 Item Part Number Description Qty�� 32890 Platform Assembly 8909 Enclosure Service Manual 28520 Platform, Swing Gate Weldment 28528 Platform, Swing Gate Latch Cable Assembly 28548 Decking Material, RY-Diamond, Aluminum, 6 Foot 28550 Platform, Weldment, 6 Foot Subassembly, Upper Control Box, Diesel 28916 (For Control Box Without PPSS - Refer To Page 122 and 124)
Page 140 Secton 22 - Platform December 2021 DETAIL B SCALE 1 : 2 10 6X DETAIL A SCALE 1 : 6 DETAIL C SCALE 1 : 2 ILLUSTRATION No. 34-J Platform Assembly Art_5704 Page 134 34-J Desel - Servce & Parts Manual...
Page 141 Secton 22 - Platform December 2021 Item Part Number Description Qty�� 32890 Platform Assembly 50000 WSHR M06 ZP Standard Flat 50006 WSHR M10 ZP Nordlock 50028 HHCS M06-1.00X020 08 ZP F 50047 NNYL M06X1.00 08 ZP Nylock 50118 NNYL 03/04-10 08 ZP Short 50327 HHCS M06-1.00X035 08 ZP P 50384...
Page 142 Secton 23 - Elevatng Assembly December 2021 Jib Assembly, Part 1 Jib Assembly, Part 1 DETAIL A SCALE 1 : 8 ILLUSTRATION No. 34-J Jib Assembly Art_5703 Page 136 34-J Desel - Servce & Parts Manual...
Page 143 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32880 Jib Assembly, 5ft 18165 Keeper Pin .375 x 2.20 28575 CAN Tilt Spreader Plate 28608 Pin - Jib Cyl., Jib Boom 28716 Jib, C-Link Roller Spacer 32190 Weldment, Bellcrank 32201 Upper Jib Tube Weldment...
Page 144 Secton 23 - Elevatng Assembly December 2021 Jib Assembly, Part 2 JIB HOSES & HARNESSES ON THE NEXT PAGE HOSE ADAPTERS CONNECTING TO PLATFORM ROTATOR ILLUSTRATION No. 34-J Jib Assembly Art_5703 Page 138 34-J Desel - Servce & Parts Manual...
Page 145 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32880 Jib Assembly, 5ft 18151 Keeper Pin 28608 Pin - Jib Cyl., Jib Boom 32216 Pin - Jib Bell Crank & Platform Rotator 50006 WSHR M10 ZP Nordlock 50034 HHCS M10-1.50X030 08 ZP F 50831...
Page 146: Platform Rotator Assembly
Secton 23 - Elevatng Assembly December 2021 Platform Rotator Assembly ILLUSTRATION No. 34-J Platform Rotator Assembly Art_5686 Page 140 34-J Desel - Servce & Parts Manual...
Page 147 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32218 Platform Rotator Assembly 32224 Bracket Weldment, Rotator 50004 WSHR M16 ZP Standard Flat 50051 NNYL M16X2.00 10 ZP Nylon Inse 50377 HHCS M16-2.00X080 10 ZP P 50647 HYFT MB-MJ90L-04-04 95119 Jib Rotator...
Page 148: Boom Assembly
Secton 23 - Elevatng Assembly December 2021 Boom Assembly Detail B Detail A ILLUSTRATION No. 34-J Boom Assembly Art_5702 Page 142 34-J Desel - Servce & Parts Manual...
Page 149 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32870 Boom Assembly 18152 1/2" Pin Retainer 32120 Subassembly, Base Boom (Refer To Page 150) 32121 Subassembly Tip Boom (Refer To Page 152) 32158 Forming, Cable Track 32166 Forming, Hose Wrap 32169 Pin, Extend Cylinder, Tip Boom...
Page 150 Secton 23 - Elevatng Assembly December 2021 DETAIL B SCALE 1 : 10 ILLUSTRATION No. 34-J Boom Assembly Art_5702 Page 144 34-J Desel - Servce & Parts Manual...
Page 151 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32870 Boom Assembly 32156 Tube, Cable Track 32157 Bracket, Cable Tube 95115 Cable Track, 26 Link Page 145 34-J Desel - Servce & Parts Manual...
Page 152 Secton 23 - Elevatng Assembly December 2021 DETAIL C SCALE 1 : 14 ILLUSTRATION No. 34-J Boom Assembly Art_5702 Page 146 34-J Desel - Servce & Parts Manual...
Page 153 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32870 Boom Assembly 32156 Tube, Cable Track 32167 Shield, Platform Manifold 32170 Pin, Extend Cylinder, Base Boom 32256 Assembly, Auxiliary Manifold (Refer To Page 164) 50000 WSHR M06 ZP Standard Flat 50047 NNYL M06X1.00 08 ZP Nylock 50134...
Page 154: Boom Assembly, Boom Extend CylNder
Secton 23 - Elevatng Assembly December 2021 Boom Assembly, Boom Extend Cylinder DETAIL D SCALE 1 : 6 HOSES & BOOM HARNESSES ON NEXT PAGE ILLUSTRATION No. 34-J Boom Assembly Art_5702 Page 148 34-J Desel - Servce & Parts Manual...
Page 155 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32239 Wearpad, Extend Cyl. 50676 HYFT MFFOR-MB45-06-06 51307 HYFT MFFOR-MB45-8-6 ; FS6802-08-06 92522 2500 PSI, CB Valve 94536 2000 PSI, CB Valve 95094 Boom Extend Cylinder Boom Hoses Part # Description Hose Name...
Page 156: Base Boom Assembly
Secton 23 - Elevatng Assembly December 2021 Base Boom Assembly 6 16X ILLUSTRATION No. 34-J Base Boom Assembly Art_5685 Page 150 34-J Desel - Servce & Parts Manual...
Page 157 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32120 Base Boom Assembly 22541 M10 X 1.5 Insert 24339 Side Wear Pad 32140 Weldment, Base Boom 32233 Inner Tube Slide Block, High Load 50006 WSHR M10 ZP Nordlock 50573 HHCS M10-1.50X016 08 ZP F Page 151...
Page 158 Secton 23 - Elevatng Assembly December 2021 Boom Tip Assembly Detail A Detail B ILLUSTRATION No. 34-J Boom Tip Assembly Art_5683 Page 152 34-J Desel - Servce & Parts Manual...
Page 159 Secton 23 - Elevatng Assembly December 2021 Item Part Number Description Qty�� 32121 Boom Tip Assembly 22541 M10 X 1.5 Insert 24339 Side Wear Pad 28775 Shim, Wear Pad, 16GA. (.060) REF. 32141 Tip Boom, Weldment 32233 Inner Tube Slide Block, High Load 50006 WSHR M10 ZP Nordlock 50573...
Page 160: Front Axle Assembly
Secton 24 - Axles December 2021 Front Axle Assembly Front Axle Assembly ILLUSTRATION No. 34-J Front Axle Assembly Art_5679 Page 154 34-J Desel - Servce & Parts Manual...
Page 161 Secton 24 - Axles December 2021 Item Part Number Description Qty�� 32100 Front Axle Assembly 32010 Weldment, Front Axle 32020 Weldment, RH Yoke 32030 Weldment, LH Yoke 32045 Weldment, Tie Rod 32324 Pin, Trunnion 50004 WSHR M16 ZP Standard Flat 50006 WSHR M10 ZP Nordlock 50033...
Page 162: Section 25 - Hydraulics
Secton 25 - Hydraulcs December 2021 Main Manifold Valves Main Manifold Valves 20.3 22.3 22.2 21.2 21.1 21.3 22.1 20.1 20.2 ILLUSTRATION No. 34-J Main Manifold Valves Art_5739 Page 156 34-J Desel - Servce & Parts Manual...
Page 163 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 95084 Manifold Assembly 2.1, 2.2 94067 Check Valve 94069 Shuttle Valve 94072 Flow Compensator 94031 Boom Lift/Lower Valve 94077 Orifice 95344 Check Valve 95345 Boom EXT/RET Valve 95346 Orifice 95347 Boom EXT Valve 95348...
Page 164: MaN ManFold Assembly
Secton 25 - Hydraulcs December 2021 Main Manifold Assembly ILLUSTRATION No. 34-J Main Manifold Assembly Art_5691 Page 158 34-J Desel - Servce & Parts Manual...
Page 165 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32257 Assembly, Main Manifold 50674 HYFT MFFOR-MB90-06-06 50675 HYFT MFFOR-MB45-04-04 50676 HYFT MFFOR-MB45-06-06 50807 HYFT MFFOR-FFORX90-8-8 ; FS6500-08-08 50819 HYFT MFFOR-MB45-8-8; FS6802-08-08-FG 50820 HYFT MFFOR-MB-6-4 ; FS6400-06-04-O 50841 HYFT MFFOR-MB-8-8 ; FS6400-08-08-O 50974 HYFT TPO-4 51004...
Page 166: ManFold Case DraN Assembly
Secton 25 - Hydraulcs December 2021 Manifold Case Drain Assembly ILLUSTRATION No. 34-J Manifold Case Drain Assembly Art_5688 Page 160 34-J Desel - Servce & Parts Manual...
Page 167 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32255 Manifold Case Drain Assembly 93863 Header Manifold 51098 HYFT MB-08-PLUG 50816 HYFT MFFOR-MB45-6-8 ; FS6802-06-08 50674 HYFT MFFOR-MB90-06-06 50676 HYFT MFFOR-MB45-06-06 Page 161 34-J Desel - Servce & Parts Manual...
Page 168: AuxLAry ManFold Valves
Secton 25 - Hydraulcs December 2021 Auxiliary Manifold Valves ILLUSTRATION No. 34-J Auxiliary Manifold Valves Art_5740 Page 162 34-J Desel - Servce & Parts Manual...
Page 169 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 95085 Micro Boom Auxiliary Manifold 94079 Valve, Pilot Operated Directional Control 3.1, 3.2 94069 Valve, Load Shuttle 4.1, 4.2, 4.3 94036 Valve, Proportional 5.1, 5.2 94077 Orifice 94079 Valve, Pilot Operated Directional Control 7.1 –...
Page 170: AuxLAry ManFold Assembly
Secton 25 - Hydraulcs December 2021 Auxiliary Manifold Assembly ILLUSTRATION No. 34-J Auxiliary Manifold Assembly Art_5690 Page 164 34-J Desel - Servce & Parts Manual...
Page 171 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32256 Auxiliary Manifold Assembly 95085 Auxiliary Manifold 51084 HYFT MFFOR-MB90-08-06; 6801-08-06 50835 HYFT MFFOR-MB-6-6 50831 HYFT MFFOR-MB-4-4 50671 HYFT MFFOR-FFORX90-04-04 50673 HYFT MFFOR-MB90 4-4 Page 165 34-J Desel - Servce & Parts Manual...
Page 172: Danfoss Pump Assembly
Secton 25 - Hydraulcs December 2021 Danfoss Pump Assembly ILLUSTRATION No. 34-J Danfoss Pump Assembly Art_5699 Page 166 34-J Desel - Servce & Parts Manual...
Page 173 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 50804 HYFT MFFOR-FFORX-6-8 ; FS2406-08-06 50806 HYFT MFFOR-MB-16-12 50817 HYFT MFFOR-MB45-8-12 50840 HYFT MFFOR-MB-8-6 ; FS6400-08-06-O 50843 HYFT MFFOR-MB90-12-12 50848 HYFT MFFOR-MB90-8-10 50975 HYFT MFFOR-MFFOR-FFORX-08 ; FS6600-08-08-08 51313 HYFT MJ-MB45-16-12 ; 6802-16-12-NOW-FG 94795 28CC Closed Loop Drive Pump 95365...
Page 174: AuxLAry Pump Assembly
Secton 25 - Hydraulcs December 2021 Auxiliary Pump Assembly ILLUSTRATION No. 34-J Auxiliary Pump Assembly Art_5696 Page 168 34-J Desel - Servce & Parts Manual...
Page 175 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 17973 Auxiliary Pump, 12 VDC 50006 WSHR M10 ZP Nordlock 50467 HHCS 3/8"-16 x 1.25 ZP 50674 HYFT MFFOR-MB90-06-06 51309 HYFT MP-MFFOR 6-8 Page 169 34-J Desel - Servce & Parts Manual...
Page 176: HydraulC Tank Assembly
Secton 25 - Hydraulcs December 2021 Hydraulic Tank Assembly ILLUSTRATION No. Page 170 34-J Desel - Servce & Parts Manual...
Page 177 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32086 Hydraulic Tank Assembly 32077 Hydraulic Tank Weldment 50002 WSHR M10 ZP Standard Flat 50034 HHCS M10-1.50X030 08 ZP F 50908 HYFT MJ-MP-16-16 51006 3/8" NPT 5406-P-06 51026 HYFT MP-08 Plug 51030 HYFT MJ-FJ-08-16 Reducer 51031...
Page 178: Charge FLter Assembly
Secton 25 - Hydraulcs December 2021 Charge Filter Assembly ILLUSTRATION No. 34-J Charge Filter Assembly Art_5692 Page 172 34-J Desel - Servce & Parts Manual...
Page 179 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32258 Charge Filter Assembly 92072 Charge Pump Filter 92169 Filter Element 32314 Mount, HYD Filter 50838 HYFT MFFOR-MB-8-12 ; FS6400-08-12-O 50849 HYFT MFFOR-MB90-8-12 ; FS6801-08-12-FG 50006 WSHR M10 ZP Nordlock 53190 HHCS 3/8"-16 X 1"...
Page 180: Telescope CylNder Assembly
Secton 25 - Hydraulcs December 2021 Telescope Cylinder Assembly AUX VIEW SHOWN IN DETAIL C DETAIL C AUX VIEW SHOWN SCALE 1 : 3 IN DETAIL B DETAIL A SCALE 1 : 3 DETAIL B SCALE 1 : 3 ILLUSTRATION No. 34-J Telescope Cylinder Assembly Art_5693...
Page 181 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32292 Telescope Cylinder, Assembly 32239 Wearpad, Extend Cyl. 50001 WSHR M08 ZP Standard Flat 50015 HHCS M08-1.25X050 08 ZP P 50048 NNYL M08X1.25 08 ZP Nylon 50676 HYFT MFFOR-MB45-06-06 50961 HYFT MB-04-PLUG 51307...
Page 182: LFt CylNder Assembly
Secton 25 - Hydraulcs December 2021 Lift Cylinder Assembly ILLUSTRATION No. 34-J Lift Cylinder Assembly Art_5707 Page 176 34-J Desel - Servce & Parts Manual...
Page 183 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32375 Lift Cylinder Assembly 50816 HYFT MFFOR-MB45-6-8 ; FS6802-06-08 50961 HYFT MB-04-PLUG 92108 2.00x2.25x1.50 NOM. Polygon Bearing 92110 2.00 X 2.25 X 2.00 Polygon Bearing 94033 HYD Counterbalance Valve 3400 PSI 94427 HYD Counterbalance Valve 3200 PSI 95092-T...
Page 184: TelescopC CylNder Assembly
Secton 25 - Hydraulcs December 2021 Telescopic Cylinder Assembly AUX VIEW SHOWN IN DETAIL B DETAIL B SCALE 1 : 3 DETAIL A SCALE 1 : 3 ILLUSTRATION No. 34-J Telescopic Cylinder Assembly Art_5708 Page 178 34-J Desel - Servce & Parts Manual...
Page 185 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32376 Telescopic Cylinder Assembly 50676 HYFT MFFOR-MB45-06-06 50961 HYFT MB-04-PLUG 51307 HYFT MFFOR-MB45-8-6 ; FS6802-08-06 92522 HYD Counterbalance Valve 2500 PSI 94536 HYD Counterbalance Valve 2000 PSI 95094-T Boom Extend Cylinder 95682 Seal Kit Page 179...
Page 186: JB CylNder Assembly
Secton 25 - Hydraulcs December 2021 Jib Cylinder Assembly ILLUSTRATION No. 34-J Jib Cylinder Assembly Art_5709 Page 180 34-J Desel - Servce & Parts Manual...
Page 187 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32377 Jib Cylinder Assembly 50831 HYFT MFFOR-MB-4-4 50961 HYFT MB-04-PLUG 93628 Bearing 1.50 ID x 1.25 LG 95062 1.50 X 1.75 X 1.00 Polygon Bearing 95095-T Jib Cylinder 95228 HYD Counterbalance Valve 3000 PSI 95229 HYD Counterbalance Valve 1000 PSI...
Page 188: Level CylNder Assembly
Secton 25 - Hydraulcs December 2021 Level Cylinder Assembly ILLUSTRATION No. 34-J Level Cylinder Assembly Art_5710 Page 182 34-J Desel - Servce & Parts Manual...
Page 189 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32378 Level Cylinder Assembly 95093-T Level Cylinder 50961 HYFT MB-04-PLUG 94527 HYD Counterbalance Valve 92214 1.50 X 1.75 X 2.00 Polygon Bearing 93740 Bearing, Polygon, 1-1/2" ID X 1-3/4" OD X 2-1/2" Long 95683 Seal Kit Page 183...
Page 190: Axle Lock CylNder
Secton 25 - Hydraulcs December 2021 Axle Lock Cylinder ILLUSTRATION No. 34-J Axle Lock Cylinder Art_5711 Page 184 34-J Desel - Servce & Parts Manual...
Page 191 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32379 Assembly, Axle Lock Cylinder 19087-T Axle Lock Cylinder - Turkey 50831 HYFT MFFOR-MB-4-4 91497 Bleeder Valve MICO 92109 1.25X1.50X1.00 NOM. Polygon Bearing 92695 1.25 X 1.50 X 2.00 Polygon Bearing 94083 Coil 95637...
Page 192: Fuel Tank Assembly
Secton 25 - Hydraulcs December 2021 Fuel Tank Assembly ILLUSTRATION No. 34-J Fuel Tank Assembly Art_5677 Page 186 34-J Desel - Servce & Parts Manual...
Page 193 Secton 25 - Hydraulcs December 2021 Item Part Number Description Qty�� 32087 Fuel Tank Assembly 6919 Shut Off Valve 32080 Weldment, Fuel Tank 91279 5/16" Barb Fitting 92480 Fuel, Non Vent Cap 92699 1/2 - 14 NPT Roll-Over Vent 94227 Coupling, 1/8 NPT, Black Forged Steel, 3000 PSI 95162 Sight Level Gauge...
Page 194: Boom Hose RoutNg, InterOr
Secton 25 - Hydraulcs December 2021 Boom Hose Routing, Interior 56163 (BHUPPER -PLCEXT / BHLOWER-PLCRET) Page 188 34-J Desel - Servce & Parts Manual...
Page 195 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� BHUPPER -PLCEXT / Bulk Head Upper To Platform Level Cylinder Extend / Bulk Head 56163 BHLOWER-PLCRET Lower To Platform Level Cylinder Retract Page 189 34-J Desel - Servce & Parts Manual...
Page 196: Boom Hose RoutNg, ExterOr
Secton 25 - Hydraulcs December 2021 Boom Hose Routing, Exterior Page 190 34-J Desel - Servce & Parts Manual...
Page 197 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� 56156 RL-RLBH RL (On Platform Manifold) To Rotate Left Bulk Head 56157 RR-RRBH RR (On Platform Manifold) To Rotate Right Bulk Head RLBH-HP1 / RRBH- Rotate Left Bulk Head To Helac Port 1 / Rotate Right Bulk Head 56158 HP-2 Helac Port 2...
Page 198: ChassS Hose RoutNg, Top VEw
Secton 25 - Hydraulcs December 2021 Chassis Hose Routing, Top View Page 192 34-J Desel - Servce & Parts Manual...
Page 199 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� 56120 FBRKT-MBRKT Front Break Tee To Middle Break Tee 56121 RBRKT-MBRKT Rear Break Tee To Middle Break Tee 56123 LFA/RFA-LBHLOWER Left Front A / Right Front A To Left Bulk Head Lower 56124 LFB/RFB-LBHUPPER Left Front B / Right Front B To Left Bulk Head Upper...
Page 200: ChassS Hose RoutNg, Bottom VEw
Secton 25 - Hydraulcs December 2021 Chassis Hose Routing, Bottom View Page 194 34-J Desel - Servce & Parts Manual...
Page 201 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� 56109 LFBRK/RFBRK-FBRKT Left Front Break / Right Front Break To Front Break Tee 56110 LFBRK/RFBRK-FBRKT Left Front Break / Right Front Break To Front Break Tee 56111 LAXLE/RAXLE-AXLET Left Axle / Right Axle To Axle Tee 56113 R-STR-LSTR JUMPER...
Page 202: ChassS To Turret Hose RoutNg, SDe VEw
Secton 25 - Hydraulcs December 2021 Chassis to Turret Hose Routing, Side View Page 196 34-J Desel - Servce & Parts Manual...
Page 203 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� 56112 AXLET-AXLEBHP Axle Tee To Axle Bulk Head Plate 56114 RSTR-RSTRBHP Right Steer To Right Steer Bulk Head Plate 56115 LSTR-LSTRBHP Left Steer To Left Steer Bulk Head Plate 56122 MBRKT-BRKBHP Middle Break Tee Tobreak Buld Head Plate...
Page 204: Turret Hose RoutNg, EngNe SDe Only
Secton 25 - Hydraulcs December 2021 Turret Hose Routing, Engine Side Only Page 198 34-J Desel - Servce & Parts Manual...
Page 205 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� 56138 SCW-SD1 SCW (On Manifold) To Slew Drive 1 56139 SCCW-SD2 SCCW (On Manifold) Wise To Slew Drive 2 56143 DPFT-CHGI Drive Pump Front Tee To Charge Inlet 56144 DPE-CHRGO Drive Pump E To Charge Outlet...
Page 206: Turret Hose RoutNg, EngNe To InterOr
Secton 25 - Hydraulcs December 2021 Turret Hose Routing, Engine to Interior Page 200 34-J Desel - Servce & Parts Manual...
Page 207 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� STR (On Manifold) To Steer Right Bulk Head Plate 56131 STR-STRBHP (Refer To Turret Hose Routing, Interior View On Page 204) STL (On Manifold) To Steer Right Bulk Head Plate 56132 STL-STLBHP (Refer To Turret Hose Routing, Interior View On Page 204)
Page 208: Turret Hose RoutNg, EngNe To Controls
Secton 25 - Hydraulcs December 2021 Turret Hose Routing, Engine to Controls Page 202 34-J Desel - Servce & Parts Manual...
Page 209 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� AUX (On Manifold) To E Down Pump 56137 AUX-EDOWNP (Refer To Turret Hose Routing, Control Side On Page 206) Drive Pump Case Drain To Tank 56147 DPCD-T (Refer To Turret Hose Routing, Control Side On Page 206) T (On Manifold) To Return Filter 56153 MMT-RF...
Page 210: Turret Hose RoutNg, InterOr VEw
Secton 25 - Hydraulcs December 2021 Turret Hose Routing, Interior View Page 204 34-J Desel - Servce & Parts Manual...
Page 211 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� STR (On Manifold) To Steer Right Bulk Head Plate 56131 STR-STRBHP (Refer To Turret Hose Routing, Engine to Interior On Page 200) STL (On Manifold) To Steer Right Bulk Head Plate 56132 STL-STLBHP (Refer To Turret Hose Routing, Engine to Interior On Page 200)
Page 212: Turret Hose RoutNg, Control SDe
Secton 25 - Hydraulcs December 2021 Turret Hose Routing, Control Side Page 206 34-J Desel - Servce & Parts Manual...
Page 213 Secton 25 - Hydraulcs December 2021 Part # Description Hose Name Qty�� PS (On Manifold) To Platform 56134 PS-P (Refer To Turret Hose Routing, Engine to Interior On Page 200) (Refer To Turret Hose Routing, Interior View On Page 204) Case Drain Bulk Head To Tank 56136 CDBHP-T...
Page 214: ChassS Assembly, Part
Secton 26 - Base December 2021 Chassis Assembly, Part 1 Chassis Assembly, Part 1 DETAIL A SCALE 1 : 4 FOR DRIVE MOTOR SEE PAGE 190 OFFSET BY 1 HOLE ILLUSTRATION No. 34-J Chassis Assembly Art_5705 Page 208 34-J Desel - Servce & Parts Manual...
Page 215 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32000 Frame Weldment 32035 Plate, Chassis Live 32044 Spacer, Swing Bearing 32059 Plate, Swing Bearing 32255 Assembly, Manifold Case Drain (Refer To Page 160) 50000 WSHR M06 ZP Standard Flat 50048 NNYL M08X1.25 08 ZP Nylon 50259...
Page 216 Secton 26 - Base December 2021 Chassis Assembly, Part 2 ILLUSTRATION No. 34-J Chassis Assembly Art_5705 Page 210 34-J Desel - Servce & Parts Manual...
Page 217 Secton 26 - Base December 2021 Item Part Number Description Qty�� 18151 Keeper Pin 18152 1/2" Pin Retainer 19087M Cylinder, Axle 32039 Pin, 44.40mm X 500mm LG 32040 Pin, Axle Lock Cylinder 32041 PIN, Ø38.1mm X 250mm LG 32054 Hose Guard 32055 Hose Guard 32100...
Page 218 Secton 26 - Base December 2021 Chassis Assembly, Part 3 DETAIL C SCALE 2 : 25 ILLUSTRATION No. 34-J Chassis Assembly Art_5705 Page 212 34-J Desel - Servce & Parts Manual...
Page 219 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32000 Frame Weldment 32051 Plate, Cover 50002 WSHR M10 ZP Standard Flat 50006 WSHR M10 ZP Nordlock 50007 WSHR M12 ZP Nordlock 50033 HHCS M10-1.50X025 08 ZP F 50425 SHCS M12-1.5 X 35MM Long 08 50440 SHCS M10-1.50X040 12 ZP F...
Page 220: EngNe Hood Assembly
Secton 26 - Base December 2021 Engine Hood Assembly DETAIL A SCALE 1 : 4 15 16 ILLUSTRATION No. 34-J Engine Hood Assembly Art_5680 Page 214 34-J Desel - Servce & Parts Manual...
Page 221 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32130 Weldment, Hood, Engine, Micro Boom 32247 Hinge Mount 50002 WSHR M10 ZP Standard Flat 50030 HHCS M8-1.25 X 20 GR 8.8 ZP 50034 HHCS M10-1.50X030 08 ZP F 50049 NNYL M10X1.50 08 ZP Nylon Inse 50191...
Page 222: EngNe SDe, Hood Stop Assembly
Secton 26 - Base December 2021 Engine Side, Hood Stop Assembly ILLUSTRATION No. 34-J Engine Side, Hood Stop Assembly Art_5681 Page 216 34-J Desel - Servce & Parts Manual...
Page 223 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32103 Hood Stop Bracket 93845 Load Rated Bumper With Threaded Stud 50203 NNYL 5/16-18, 05, ZP 50001 WSHR M08 ZP Standard Flat 50048 NNYL M08X1.25 08 ZP Nylon 50030 HHCS M8-1.25 X 20 GR 8.8 ZP Page 217 34-J Desel - Servce &...
Page 224: Control Hood Assembly
Secton 26 - Base December 2021 Control Hood Assembly DETAIL A SCALE 1 : 4 15 16 ILLUSTRATION No. 34-J Control Hood Assembly Art_5682 Page 218 34-J Desel - Servce & Parts Manual...
Page 225 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32106 Control Hood Assembly 32107 Hood Weldment, Controls, Micro Boom 32247 Hinge Mount 50002 WSHR M10 ZP Standard Flat 50030 HHCS M8-1.25 X 20 GR 8.8 ZP 50034 HHCS M10-1.50X030 08 ZP F 50049 NNYL M10X1.50 08 ZP Nylon Inse 50191...
Page 226: Control SDe, Hood Stop Assembly
Secton 26 - Base December 2021 Control Side, Hood Stop Assembly ILLUSTRATION No. 34-J Control Side, Hood Stop Assembly Art_5687 Page 220 34-J Desel - Servce & Parts Manual...
Page 227 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32249 Control Side, Hood Stop Assembly Hood Stop Assembly (Refer To Page 216) 32248 Bracket, Hood Stop Page 221 34-J Desel - Servce & Parts Manual...
Page 228: D1105 EngNe KT
Secton 26 - Base December 2021 D1105 Engine Kit ILLUSTRATION No. 34-J D1105 Engine Kit Art_5684 Page 222 34-J Desel - Servce & Parts Manual...
Page 229 Secton 26 - Base December 2021 Item Part Number Description Qty�� 5882 P-Clamp W/VNL 5/8 ID X .50 Wide 27265 Rubber Flap Side Mount 27266 Top Airflow 32258 Assembly, Charge Filter (Refer To Page 172) 32319 Top Separator Bracket 32320 Top Separator, Radiator Hot Air 32321 Side Separator, Radiator Hot Air...
Page 230 Secton 26 - Base December 2021 D1105 Engine Kit, Part 2 DETAIL A ILLUSTRATION No. 34-J D1105 Engine Kit Art_5684 Page 224 34-J Desel - Servce & Parts Manual...
Page 231 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32200 D1105 Engine Kit 7788 SAE 4 Hose Clamp 16210 Spacer, Engine 16347 Throttle Link 17854 Dual Solenoid Bracket 17969 Motor Mount, Engine, 70 DR. 32070 Engine Mount, RH 32258 Assembly, Charge Filter (Refer To Page 172) 32259...
Page 232 Secton 26 - Base December 2021 D1105 Engine Kit, Part 3 ILLUSTRATION No. 34-J D1105 Engine Kit Art_5684 Page 226 34-J Desel - Servce & Parts Manual...
Page 233 Secton 26 - Base December 2021 Item Part Number Description Qty�� 17969 Motor Mount, Engine, 70 DR. 32071 Engine Mount, LH 32258 Assembly, Charge Filter (Refer To Page 172) 50006 WSHR M10 ZP Nordlock 50116 HHCS M10-1.5X025 08 ZP 9831 Radiator 90227 Alternator...
Page 234 Secton 26 - Base December 2021 D1105 Engine Kit, PMP Pump and Fittings DETAIL B DETAIL C DETAIL D ILLUSTRATION No. 34-J D1105 Engine Kit, PMP Pump & Fittings Art_5684 Page 228 34-J Desel - Servce & Parts Manual...
Page 235 Secton 26 - Base December 2021 Item Part Number Description Qty�� 31068 Adaptor, Temperature Sensor 50786 HYFT MB-MJ90-16-16 ; 6801-16-16-NWO 50806 HYFT MFFOR-MB-16-12 50848 HYFT MFFOR-MB90-8-10 51037 HYFT MB-MFFOR 12-8 51063 HYFT MFFOR-MB45-12-12 51314 HYFT MB-MFFOR90 10-08 95111 Sensor, Electronic Temperature 95235 35CC Closed Loop Pump 95460...
Page 236: Exhaust Assembly
Secton 26 - Base December 2021 Exhaust Assembly ILLUSTRATION No. 34-J Exhaust Assembly Art_5678 Page 230 34-J Desel - Servce & Parts Manual...
Page 237 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32088 Exhaust Assembly 32090 Tube, Exhaust, End 32251 Exhaust, Weldment 50032 HHCS M8-1.25 x 30 ZP 50200 M08 Nordlock Washer 92965 Exhaust Muffler, 6” Round, 1.5" ID Inlet, 1.5" ID Outlet 93267 1-5/8"...
Page 238: Turret Assembly, Part 1
Secton 26 - Base December 2021 Turret Assembly, Part 1 38 43 44 2X ILLUSTRATION No. 34-J Turret Assembly Art_5701 Page 232 34-J Desel - Servce & Parts Manual...
Page 239 Secton 26 - Base December 2021 Item Part Number Description Qty�� 9716 Horn 12v-48v 17475 Battery Holding 17966 Battery 950CCA Group 31- Threaded Stud 18152 1/2" Pin Retainer 22563 Battery Hold Down Bolt 32062 Turret Weldment 32075 Turret Cross-Member 32083 Battery Tray 32084 Pin, Ø50.80mm X 358mm LG...
Page 240 Secton 26 - Base December 2021 Turret Assembly, Part 2 33 40 4X 19 45 42 41 ILLUSTRATION No. 34-J Turret Assembly Art_5701 Page 234 34-J Desel - Servce & Parts Manual...
Page 241 Secton 26 - Base December 2021 Item Part Number Description Qty�� 18152 1/2" Pin Retainer 28347 Bracket, Cable Guide, Forming 32062 Turret Weldment 32075 Turret Cross-Member 32084 Pin, Ø50.80mm X 358mm LG 32101 Assembly, Hood, Engine, Micro Boom (Refer To Page 214) 32105 Plate, Cover, Front Turret 32106...
Page 242: Turret Assembly, Part 3
Secton 26 - Base December 2021 Turret Assembly, Part 3 41 42 36 37 DETAIL B SCALE 1 : 10 ILLUSTRATION No. 34-J Turret Assembly Art_5701 Page 236 34-J Desel - Servce & Parts Manual...
Page 243 Secton 26 - Base December 2021 Item Part Number Description Qty�� 9716 Horn 12v-48v 32076 Spacer, Turret Stop 32086 Hydraulic Tank Assembly (Refer To Page 170) 32093 Lower Control Box Bracket 32249 Hood Stop Assembly (Refer To Page 220) 32284 Plate, Accessories 32313 Auxiliary Pump Assembly (Refer To Page 168)
Page 244: Turret Assembly, Part 4
Secton 26 - Base December 2021 Turret Assembly, Part 4 39 35 21 37 46 51 DETAIL A SCALE 1 : 15 29 48 ILLUSTRATION No. 34-J Turret Assembly Art_5701 Page 238 34-J Desel - Servce & Parts Manual...
Page 245 Secton 26 - Base December 2021 Item Part Number Description Qty�� 32076 Spacer, Turret Stop 32088 Exhaust, Sub-Assembly (Refer To Page 230) 32095 Radiator Support, Bracket 32102 Hood Stop Assembly (Refer To Page 216) 32114 Bracket, Upper Support, Radiator 32200 Engine Kit, D1105 (Refer To Page 222-228) 32246 Mount, Hood Latch...
Page 246: Section 27 - Options
Secton 27 - Optons December 2021 Option, Cold Weather Option, Cold Weather WRAP HEATER PAD AROUND BATTERY CLOCK @ 2 DETAIL A SCALE 1 : 3 PLACE HEATER PAD ON HYD TANK 16 GAL OF ITEM ILLUSTRATION No. 34-J Option, Cold Weather Art_5694 Page 240 34-J Desel - Servce &...
Page 247 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32294 Cold Weather Option 32850 Turret Subassembly (Refer To Pages 232-238) 19177 Battery Blanket-110V, 36" 93439 Heater, Cylinder Head A0101 Rando Premium MV (Gallon) 92506 6' 15A-125VAC Extension Cord 92507 2' 14/3 15A-125VAC 3-WAY Split Cord 93275...
Page 248: OptOn, 3
Secton 27 - Optons December 2021 Option, 3�� 5 kW Generator DETAIL B AUX VIEW SHOWN IN DETAIL B AUX VIEW SHOWN IN DETAIL A&C ORIENTATION OF 19 GEN RETURN DETAIL C SCALE 1 : 7 GEN SUPPLY DETAIL A ILLUSTRATION No.
Page 249 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32240 Option, 3.5kW Generator 7115 Pry Out Plug 50811 HYFT MFFOR-FFORX-MFFOR-8 ; FS6602-08-08-08 50824 HYFT MFFOR-FFORX-MFFOR-6 ; FS6602-06-06-06 51309 HYFT MP-MFFOR 6-8 92277 10/3 So Cord, Power To Platform, Foot 92477 Butt Connector 10-12 AWG Non Insulated A0029...
Page 250 Secton 27 - Optons December 2021 HOSES LISTED ON NEXT PAGE VIEW FROM UNDERNEATH ILLUSTRATION No. 34-J Option, 3.5kW Generator Art_5689 Page 244 34-J Desel - Servce & Parts Manual...
Page 251 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32240 Option, 3.5kW Generator 32237 Bracket, 3.5 KW GEN 32238 Bracket, Manifold 3.5KW 32297 3.5KW Generator Manifold Assembly (Refer To Page 246) 50007 WSHR M12 ZP Nordlock 50132 M12-1.5X030 08 ZP 50836 HYFT MFFOR-MB-6-8 ;...
Page 252: OptOn, 3
Secton 27 - Optons December 2021 Option, 3�� 5 kW Generator Manifold Assembly ILLUSTRATION No. 34-J 3.5kW Generator Manifold Assembly Art_5695 Page 246 34-J Desel - Servce & Parts Manual...
Page 253 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32297 3.5KW Generator Manifold Assembly 50835 HYFT MFFOR-MB-6-6 50841 HYFT MFFOR-MB-8-8 ; FS6400-08-08-O 95238 Generator Manifold, 3.5KW 95712 Valve 95711 Valve 94083 Coil Page 247 34-J Desel - Servce & Parts Manual...
Page 254: OptOn, Upper Control Box Cover
Secton 27 - Optons December 2021 Option, Upper Control Box Cover ILLUSTRATION No. 34-J Option, Upper Control Box Cover Art_5698 Page 248 34-J Desel - Servce & Parts Manual...
Page 255 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32356 Option, Upper Control Box Cover 32352 Weldment, Upper Control Box Cover 53090 BHCS M06-1.00X070, 12.9, SS, F 53092 NNYL M03-0.50 SS 92852 UHMW 1.25" X 5.5" C-Channel Wear Strip 94268 Clamp, Round Tube, 35 mm, Polyamide, Black 94486...
Page 256: OptOn, 7
Secton 27 - Optons December 2021 Option, 7�� 5 kW Generator Assembly AUX VIEW SHOWN IN DETAIL A DETAIL B SCALE 1 : 4 25° DETAIL A SCALE 2 : 15 IN PLATFORM ILLUSTRATION No. 34-J 7.5kW Generator Assembly Art_5700 Page 250 34-J Desel - Servce &...
Page 257 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 32374 Option , 7.5 kW Generator Assembly 32237 Bracket, 3.5 kW Gen 32238 Bracket, Manifold 3.5KW 50007 WSHR M12 ZP Nordlock 50132 M12-1.5X030 08 ZP 28993 7.5kW Generator Manifold Assembly (Refer To Page 256) 94612 Pump HYD Rexroth 18CC 93829...
Page 258: OptOn - 7
Secton 27 - Optons December 2021 Option - 7�� 5 kW Breaker Box 2 PLCS 2 PLCS 67 FT TO PLATFORM CUT-OUT DETAIL TO 7.5KW GENERATOR 3 PLCS 3 FT 2 PLCS SEE DETAIL A GROUND JUNCTION BOX FOR FRONT DECAL LOCATIONS 3X CENTER ON DOOR APPROX.
Page 259 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 31220 Subassembly, Option, 7.5KW Breaker Box 28849 Option, 7.5kW Generator DIN Rail 28894 Option, 7.5kW Back Panel Hole Cutout 31144 Option, 7.5kW Breaker Box Cutout 50191 THMS #10-32 × 0.50 ZP 50238 NNYL #10-32 05 Z 50337...
Page 260: OptOn - Subassembly, 7
Secton 27 - Optons December 2021 Option - Subassembly, 7�� 5 kW Outlet Boxes MkII PLATFORM JUNCTION BOXES 16 15 17 ILLUSTRATION No. 45-J Subassembly, 7.5kW Outlet Boxes MkII Art_5733 Page 254 34-J Desel - Servce & Parts Manual...
Page 261 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 28573 Subassembly, Option, 7.5KW Outlet Boxes MKII 28574 Outlet Box Forming 53180 HHMS #08-32 X 0.50" ZP Type F Thread Cutting 92271 Outlet, 120V 20A GFCI 92661 Terminal, Ring #10 Stud, 12-10 AWG 94354 Cord/Cable Connector, Strain Relief, Liquidtight, 3/4”, Steel 94414...
Page 262: OptOn - 7
Secton 27 - Optons December 2021 Option - 7�� 5 kW Generator Manifold Assembly ILLUSTRATION No. 34-J 7.5kW Generator Manifold Assembly Art_5696 Page 256 34-J Desel - Servce & Parts Manual...
Page 263 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 28993 7.5kW Generator Manifold Assembly 94108 2 By 2 Parallel Body #12 51066 HYFT MFFOR-MB90-10-12 94109 Plug For 94108 51217 HYFT MB-12 PLUG 51199 HYFT MFFOR-FFORX-MFFOR-10 FF6602-10-10-10 94410 Needle Valve 94126 2 Way Proportional Valve NC W/12 E-Coil 51198...
Page 264: OptOn - ProactVe Platform Safety System
Secton 27 - Optons December 2021 Option - Proactive Platform Safety System SECTION D-D SCALE 1 : 12 DETAIL M SCALE 1 : 8 ILLUSTRATION No. 45-J Option, Proactive Platform Safety System Art_5605 Page 258 34-J Desel - Servce & Parts Manual...
Page 265 Secton 27 - Optons December 2021 Item Part Number Description Qty�� 28537 Bracket, Prox Switch Mount 28865 Harness, PPSS Extension 28866 Harness, PPSS Control 28890 Harness, PPSS Override 42386 Harness, PPSS Sensor Cable 90 Deg 50000 WSHR M06 ZP Standard Flat 50047 NNYL M06X1.00 08 ZP Nylock 50141...
Page 266: Section 28 - Decals
Secton 28 - Decals December 2021 Decals Decals 9 10 Page 260 34-J Desel - Servce & Parts Manual...
Page 267 Secton 28 - Decals December 2021 Front of Turret Front of Turret Inside Front of chassis Opposite side of chassis also INSIDE CASE Page 261 34-J Desel - Servce & Parts Manual...
Page 268 Secton 28 - Decals December 2021 91975 Qty. - 2 95183 Qty. - 2 93801 Qty. - 2 93807 Qty. - 2 93755 Qty. - 2 93572 Qty. - 2 93930 Qty. - 1 92117 Qty. - 1 90732 Qty. - 1 93805 Qty.
Page 269 December 2021 Page 263 34-J Desel - Servce & Parts Manual...
Page 270 MEC Parts Order Form Phone: 559-842-1523 Fax: 559-400-6723 Email: Parts@mecawp.com Please Fill Out Completely: Date: Ordered By: Account: Your Fax No�� : Bill to: Ship to: Purchase Order Number Ship VIA ** All orders MUST have a Purchase Order Number...
Page 271 MEC Aerial Platform Sales Corp. and is found upon inspection by MEC Aerial Platform Sales Corp. to be defective in material and/or workmanship. MEC Aerial Platform Sales Corp. shall not be liable for any consequential, incidental or contingent damages whatsoever.
Page 272 MEC Aerial Work Platforms 1401 S. Madera Avenue, Kerman, CA 93630 USA Toll Free: 1-877-632-5438 Phone: 1-559-842-1500 Fax: 1-559-842-1520 info@MECawp.com www.MECawp.com...

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5596

Mec 34-J Diesel Service & Parts Manual

Chapter 1 - Service

Service Introduction

Section 1 - MEC Operator Policy

Section 2 - Safety Symbols & General Safety Tips

Section 3 - Specifications

Section 4 - Torque Specifications

Section 5 - Boom Support

Section 6 - Hydraulic, Electrical & Total System

Section 10 - Hydraulic System

Section 11 - Electrical System

Chapter 2 - Parts

Parts Introduction

Section 25 - Hydraulics

Section 27 - Options

Section 28 - Decals

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