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Bradco CONTRACTOR 408A BACKHOE Operator's & Parts Manual

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CONTRACTOR
408A
BACKHOE
OPERATOR'S & PARTS
MANUAL
BRADCO
®
P.O. Box 266 · Delhi, Iowa 52223 USA
(319) 922-2981 ·(800) 922-2981
Fax 319-922-2130
A Division of Attachment Technologies Incorporated

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Summary of Contents for Bradco CONTRACTOR 408A BACKHOE

  • Page 1 CONTRACTOR 408A BACKHOE OPERATOR'S & PARTS MANUAL BRADCO ® P.O. Box 266 · Delhi, Iowa 52223 USA (319) 922-2981 ·(800) 922-2981 Fax 319-922-2130 A Division of Attachment Technologies Incorporated...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 408A BACKHOE TO THE OWNER ....................A SAFETY PRECAUTIONS ................... B INTERNATIONAL SYMBOLS ................C PRE-OPERATION ....................D General Information Preparing the Tractor Bucket Options Backhoe - Major Component Nomenclature OPERATING INSTRUCTIONS ................G General Information Controls Before You Start Digging Basic Digging Technique Special Applications...

  • Page 5: To The Owner

    TO THE OWNER GENERAL COMMENTS Congratulations on the purchase of your new backhoe! Your backhoe was carefully designed and manufactured to give you many years of dependable service. Your backhoe will require some minor maintenance (such as cleaning and lubricating) to keep it in top working condition. Be sure to observe all main- tenance procedures and safety precautions in this manual and on the safety decals located on the backhoe and on any equipment on which the backhoe is mounted.
  • Page 7 SAFETY PRECAUTIONS TAKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS MANUAL IS USED TO CALL YOUR ATTENTION TO INSTRUCTIONS IN- VOLVING YOUR PERSONAL SAFETY OR OTHERS. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN INJURY OR DEATH. THIS SYMBOL MEANS: ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!

  • Page 9: Safety Precautions

    SAFETY PRECAUTIONS Do not take passengers on the tractor or backhoe. There is no safe place for a passenger. Use the handholds and step plates when getting on/off the tractor. Failure to do so could cause a fall. Inspect the tractor before you try to operate the unit. Check for needed maintenance or repairs and be sure to have them done before using the equipment.
  • Page 10 SAFETY PRECAUTIONS Block off work area from all bystanders, livestock, etc. Allow plenty of room for backhoe reach and swing. When operating on slopes, dig with the backhoe uphill, and avoid full reach and swinging the backhoe bucket to the downhill side. Tipping could result.
  • Page 11 SAFETY PRECAUTIONS MAINTENANCE Never work on equipment while it is running. Block up equipment, set hand brake, lower bucket and stabilizers, turn off the tractor and remove the key before performing repairs. Never make hydraulic repairs while the system is under pressure, or the cylinders are under load.

  • Page 13: International Symbols

    INTERNATIONAL SYMBOLS As a guide to the operation of your equipment, various international symbols have been utilized on the instruments and controls. The symbols are shown below with an indication of their meaning. Engine speed Alternator charge Hours recorded Power take-off (on) Engine water temperature Power take-off (off) Lights...
  • Page 14 PRE-OPERATION CONTRACTOR 408A BACKHOE GENERAL INFORMATION The purpose of this manual is to assist in setting up, operating and maintaining your backhoe. Read it carefully. It furnishes information and instructions that will help you achieve years of dependable performance. Right and left, when referred to in this manual, are determined from the operator's control position when facing the backhoe.

  • Page 15: Pre-Operation

    PRE-OPERATION BACKHOE MAJOR COMPONENT NOMENCLATURE CONTRACTOR 408A BACKHOE GENERAL INFORMATION Throughout this manual, reference is made to various backhoe com- ponents. The purpose of this page is to acquaint you with the various names of these components. This knowledge will be helpful when reading through this manual or when ordering service parts.

  • Page 16: Operating Instructions

    OPERATING INSTRUCTIONS CONTROLS GENERAL INFORMATION Your backhoe is operated by four different control levers. Two are for stabilizer operation and the other two operate the swing, boom, dipper, and bucket functions. The information contained below will help you become familiar with the operation of each control lever. Read the safety precau- tions (Section B) of this manual before attempting to use the backhoe.

  • Page 17: Before You Start Digging

    OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES GENERAL INFORMATION When operating the backhoe, smoothness of technique should be strived for at all times. Smoothness will come with experience and practice at feathering the controls. Establish a flowing digging cycle to increase operator efficiency and save unnecessary wear on the machine.
  • Page 18 OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES BEFORE YOU START DIGGING (CONTINUED) Once the unit is positioned, lower the stabilizers to the ground. The tires should still be supporting most of the vehicle weight with the stabiliz- ers relieving only part of the weight, and mainly acting to give the unit a wider base for increased stability and to keep the unit from moving or bouncing with backhoe use.

  • Page 19: Basic Digging Technique

    OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES BASIC DIGGING TECHNIQUE When starting an excavation, make the first cut of each section shallow, being careful to follow the exact layout of the excavation. The reason for the shallow cut is to minimize damage to the sod and to facilitate replacement. These first cuts are also important because they will act as guides for the re- maining cuts, thus getting the first few cuts as accurate as possible will help in keeping all future cuts accurate.

  • Page 20: Special Applications

    OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES BASIC DIGGING TECHNIQUES (CONTINUED) Once the sides are cleaned up, finish grading the bottom of the exca- vation. This is done by making the remaining cuts long and shallow, con- centrating on making them level and smooth. Remove any remaining spoil. Check the excavation bottom for depth and levelness, making any adjusting cuts as needed.
  • Page 21 OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES TRENCHING BETWEEN A BUILDING AND AN OPEN EXCAVATION (CONTINUED) Position the unit so the backhoe swing post is over the centerline of the trench connection. Dig with the backhoe at extreme swing positions, and in as close to the stabilizers as possible.
  • Page 22 OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES EXCAVATING ON SLOPES When digging on slopes always face the backhoe upgrade whenever possible. It may be necessary to cut a level surface in the hill for the back- hoe to sit in when operating on slopes. This will allow the backhoe to sit level for digging the main excavation.
  • Page 23 OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES PIPELINE LEAK REPAIR To check for pipeline leaks, start by digging a bellhole about six feet wide and ten feet long. Then, dig lengthwise along the pipeline to locate the leak. Once the leak is located, position the unit to dig at grade level on both sides of the pipeline.
  • Page 24 OPERATING INSTRUCTIONS OPERATING TECHNIQUES ATTACHMENT TYPE BACKHOES MISCELLANEOUS - BACKFILLING To backfill an excavation, lower the extended bucket into the spoil pile. Curl the bucket and lift it clear of the spoil pile. Swing the bucket to the excavation and extend the bucket. Return the bucket to the spoil pile and continue the cycle until the job is completed.

  • Page 25: Transporting

    OPERATING INSTRUCTIONS TRANSPORTING GENERAL INFORMATION Follow the simple steps listed below when preparing the backhoe for transportation between work sites. Read and follow the safety precautions for backhoe transporting listed in Section B of this manual before moving the backhoe. Before transporting the backhoe, raise the boom, dipper, and bucket to the transporting position.

  • Page 26: Lubrication

    LUBRICATION 408A BACKHOE GENERAL INFORMATION Economical and efficient operation of any machine is dependent upon regular and proper lubrication of all moving parts with a quality lubricant. Neglect leads to reduced efficiency, heavy draft, wear, breakdown, and needless replacement parts. All parts provided with grease fittings should be lubricated as indi- cated.
  • Page 27 LUBRICATION 408A BACKHOE BACKHOE LUBRICATION DIAGRAM The following diagram is provided to help you locate all the points on your backhoe that need lubricating. Be sure to follow the lubrication inter- vals as noted by the lubrication symbols used on this page. Always replace any missing grease fittings as soon as possible.
  • Page 28 MAINTENANCE GENERAL MAINTENANCE GENERAL INFORMATION Regular maintenance is the key to long equipment life and safe opera- tion. Maintenance requirements have been reduced to an absolute mini- mum. However, it is very important that these maintenance functions be performed as described below. EVERY 8 HOURS OF OPERATION Grease all swivel points (ram and base end of all cylinders) thor- oughly.
  • Page 29 MAINTENANCE GENERAL MAINTENANCE CONTROL VALVE The hydraulic control valve maintenance is normally limited to replace- ment of O-ring seals, cleaning and the replacement of valve sections or relief valve cartridges. The most common cause of premature wear and malfunctioning of hy- draulic system components is the ingress on contaminants and incorrect high pressure inlet and low pressure return connections (cavitation).

  • Page 30: Maintenance

    MAINTENANCE 408A BACKHOE HOSE ROUTING GENERAL INFORMATION The purpose of this page is to show the hydraulic hose routing be- tween the backhoe control valve and the various backhoe hydraulic cylin- ders. This information is helpful when trouble shooting cylinder and control valve related problems.
  • Page 31 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE GENERAL INFORMATION The following information is provided to assist you in the event you should need to repair or rebuild a hydraulic cylinder. When working on hydraulic cylinders, make sure that the work area and tools are clean and free of dirt to prevent contamination of the hydraulic system and damage to the hydraulic cylinders.
  • Page 32 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE Pull the cylinder rod from the Remove and discard all old seals. cylinder tube. THREADED TYPE GLAND Inspect the piston and the bore of the cylinder tube for deep scratches or 1 . Rotate the gland with a spanner galling.
  • Page 33 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE ASSEMBLY PROCEDURE Inspect the piston and the bore of the cylinder tube for deep scratches or GENERAL galling. If damaged, the piston and cylinder tube must be replaced. IMPORTANT: Replace all seals even if they do not appear to be damaged. Failure to replace all seals may result in premature cylinder failure.
  • Page 34 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE RETAINING RING TYPE GLAND After installing the internal gland seal, install the external O-ring and backup washer. O - RING Now insert the seal into the gland from the inner end. Position the seal in it's BACKUP WASHER groove, and release and remove the tool.
  • Page 35 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE shown on the chart for the thread Rotate the gland until the gland retain- diameter of the cylinder rod.(see chart) ing rod forms a ring between the gland IMPORTANT: Do not contact the and the cylinder tube. active surface of the cylinder rod with When complete, the bent end of the the vise.
  • Page 36 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE Slide the gland onto the cylinder INPORTANT: Ensure that the piston rod being careful not to damage the ring fits squarely into the cylinder tube rod wiper. Then install the spacer, or and piston groove, otherwise the ring flat washer (if so equipped), small O- may be damaged and a leak will occur.
  • Page 37 MAINTENANCE INSTRUCTIONS CYLINDER SEAL REPLACE TORQUE SPECIFICATION CHART Use the following torque values when tightening the nuts on the cylinder rod threads. POUNDS - FEET Thread Diameter Minimum Maximum 7/8 " * 1 " 1-1/8 " 1-1/4 " 1-3/8 " * 1"...

  • Page 38: Backhoe Storage

    BACKHOE STORAGE 408A BACKHOE BACKHOE STORAGE To prepare the backhoe for storage, first wash off all dirt and grime from the unit. Coat the exposed portions of the cylinder rods with grease. Lubricate all grease fittings. Make sure the backhoe hydraulic system is properly sealed against contaminates entering the unit.

  • Page 39: Troubleshooting

    TROUBLESHOOTING PROBLEM POSSIBLE CAUSE REMEDY Backhoe fails to lift or Low oil supply Add oil swing Improper hose hookup Check hydraulic dia- gram; reinstall properly Worn control valve Replace section section Pump damaged or Replace pump worn Broken hydraulic line Check for leaks and re- place line Jammed swing linkage...
  • Page 40 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE REMEDY Backhoe fails to hold up Broken or leaking lines Replace broken hose load and check for leaks Dirty oil Drain and refill oil, replace filter Oil leaking past cylin- Replace packings der packings Oil leaking past control Replace or repair worn valve section...
  • Page 41 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE REMEDY External leakage Control valve tie bolts Torque bolts to loose 20 ft.lbs. Damaged O-rings Repair control valve between valve sections Damaged O-rings on Repair control valve valve spools Cylinder seals damaged Repair cylinder Damaged O-rings on Repair control valve valve drop check Broken oil lines...

  • Page 42: Bolt Torque

    BOLT TORQUE BOLT TORQUE SPECIFICATIONS GENERAL TORQUE SPECIFICATION TABLE Use the following torques when special torques are not given. These values apply to fasteners as received from suppliers, dry, or when lubricated with normal engine oil. They do not apply if special graphited or moly disulphide greases or other extreme pressure lubricants are used.

  • Page 43: Pre-Delivery Checklist

    PRE-DELIVERY CHECKLIST GENERAL INFORMATION The following is a list of areas that should be inspected by the dealer prior to delivery of the backhoe to the customer. The customer should check the list and make sure that the dealer has completed the inspection. Completion of this check list will help insure that the customer receives the backhoe in complete working order, ready to install.

  • Page 44: Limited Warranty

    Any claims under this warranty must be made within fifteen (15) days after the Buyer learns of the facts upon which such claim is based. All claims not made in writing and received by BRADCO within the time period specified above shall be deemed waived.
  • Page 45 TABLE OF CONTENTS SERVICE PARTS MAINFRAME ASSEMBLY ......... SN #8408AX973 AND UP ....#85700 UP TO SN #8408AX972 ....#83371 Mainframe Swing Post Swing Cylinder Stabilizers Hose Bundle SEAT ..........................#6980 BOOM & DIPPER ASSEMBLY ......SN #8408AX973 AND UP ....#85699 UP TO SN #8408AX972 ....

  • Page 46: Mainframe Assembly

    MAINFRAME ASSEMBLY ASSEMBLY #85700 MAINFRAME SERIAL #8408AX973 AND UP 7459 6-5-98...
  • Page 47 MAINFRAME ASSEMBLY ASSEMBLY #85700 MAINFRAME SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 1043 .38" UNC X 1.00" Hex Capscrew (Two pin retaining capscrews installed with Locktite Grade 242) 1514 .38" Flat Washer 81807 Spacer Tube 81592 6616 Grease Zerk 83977 Thrust Washer 1.38"...

  • Page 48: Swing Post

    MAINFRAME ASSEMBLY ASSEMBLY #85700 SWING POST SERIAL #8408AX973 AND UP 7461 6-8-98...
  • Page 49 MAINFRAME ASSEMBLY ASSEMBLY #85700 SWING POST SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 1043 .38" UNC X 1.00" Hex Capscrew (Installed with Locktite Grade 242) 1503 .38" Lock Washer 1514 .38" Flat Washer 81807 Spacer Tube 81847 85720 Swing Post (Includes (2) 81828 Bushings Installed with Locktite Grade 680) 82534 As Req'd...

  • Page 50: Swing Cylinder

    MAINFRAME ASSEMBLY ASSEMBLY #85700 SWING CYLINDER SERIAL #8408AX973 AND UP MAINFRAME SWING POST 7463 6-8-98...
  • Page 51 MAINFRAME ASSEMBLY ASSEMBLY #85700 SWING CYLINDER SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION As Req'd 57693 Thrust Washer 1.25" X .078" As Req'd 64727 Thrust Washer 1.25" X .145" As Req'd 64728 Thrust Washer 1.25" X .031" 62523 Self Aligning Bushing (Included in Swing Cylinder Assembly) 81585 Spacer...

  • Page 52: Stabilizers

    MAINFRAME ASSEMBLY ASSEMBLY #85700 STABILIZERS SERIAL #8408AX973 AND UP MAINFRAME 7465 6-8-98...
  • Page 53 MAINFRAME ASSEMBLY ASSEMBLY #85700 STABILIZERS SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 1652 Snap Ring 57693 Thrust Washer 1.25" X .078" As Req'd 64727 Thrust Washer 1.25" X .145" As Req'd 64728 Thrust Washer 1.25" X .031" As Req'd 81846 83397 Stabilizer Cylinder Assembly...
  • Page 54 HOSE BUNDLE CLAMPS 7392 4-22-98...
  • Page 55 HOSE BUNDLE CLAMPS UP TO SERIAL #---10065 REQ'D PART NO. DESCRIPTION 1043 .38" UNC X 1.00" Hex Capscrew 84724 Right Hose Bundle Clamp 1837 .38" UNC Deformed Lock Nut 84718 Left Hose Bundle Clamp SERIAL #---10065 AND UP REQ'D PART NO. DESCRIPTION 1043 .38"...
  • Page 56 MAINFRAME ASSEMBLY ASSEMBLY #83371 MAINFRAME UP TO SERIAL #8408AX972 6720 6-5-98-2...
  • Page 57 MAINFRAME ASSEMBLY ASSEMBLY #83371 MAINFRAME UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 1043 .38" UNC X 1.00" Hex Capscrew (Two pin retaining capscrews installed with Locktite Grade 242) 1514 .38" Flat Washer 81807 Spacer Tube 81592 6616 Grease Zerk 83977 Thrust Washer 1.38"...
  • Page 58 MAINFRAME ASSEMBLY ASSEMBLY #83371 SWING POST UP TO SERIAL #8408AX972 6722 6-8-98-2...
  • Page 59 MAINFRAME ASSEMBLY ASSEMBLY #83371 SWING POST UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 1043 .38" UNC X 1.00" Hex Capscrew (Installed with Locktite Grade 242) 1503 .38" Lock Washer 1514 .38" Flat Washer 81807 Spacer Tube 81847 83648 Swing Post (Includes (2) 81828 Bushings Installed with Locktite Grade 680) 82534 As Req'd...
  • Page 60 MAINFRAME ASSEMBLY ASSEMBLY #83371 SWING CYLINDER UP TO SERIAL #8408AX972 MAINFRAME SWING POST 6724 6-8-98-3...
  • Page 61 MAINFRAME ASSEMBLY ASSEMBLY #83371 SWING CYLINDER UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 1521 1.25" Flat Washer 62523 Self Aligning Bushing (Included in Swing Cylinder Assembly) 81585 Spacer 68057 Thrust Washer 82441 Needle Bearing (Included in Swing Cylinder Assembly) 81827 Swing Cylinder Assembly (Includes (2) #82441 Needle Bearings and...
  • Page 62 MAINFRAME ASSEMBLY ASSEMBLY #83371 STABILIZERS UP TO SERIAL #8408AX972 MAINFRAME 6726 6-8-98-2...
  • Page 63 MAINFRAME ASSEMBLY ASSEMBLY #83371 STABILIZERS UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 1652 Snap Ring 57693 Thrust Washer 1.25" X .078" As Req'd 64727 Thrust Washer 1.25" X .145" As Req'd 64728 Thrust Washer 1.25" X .031" As Req'd 81846 83397 Stabilizer Cylinder Assembly...
  • Page 64 SEAT ASSEMBLY 6731 12-8-95...

  • Page 65: Seat

    SEAT ASSEMBLY REQ'D PART NO. DESCRIPTION 6980 Seat 6732 12-8-95...
  • Page 66 BOOM & DIPPER ASSEMBLY ASSEMBLY #85699 SERIAL #8408AX973 AND UP 12 15 7455 6-10-98...
  • Page 67 BOOM & DIPPER ASSEMBLY ASSEMBLY #85699 SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 85663 Boom Cylinder Assembly 53031 90° Grease Zerk As Req'd 6623 Thrust Washer 1.38" X .031" As Req'd 64724 Thrust Washer 1.38" X .090" As Req'd 64725 Thrust Washer 1.38"...
  • Page 68 BOOM & DIPPER ASSEMBLY ASSEMBLY #85699 SERIAL #8408AX973 AND UP BUCKET (NOT INCLUDED IN BOOM & DIPPER ASSEMBLY) 7457 6-10-98...
  • Page 69 BOOM & DIPPER ASSEMBLY ASSEMBLY #85699 SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 85677 Bucket Cylinder Assembly 53031 90° Grease Zerk 6616 Grease Zerk 1650 Snap Ring As Req'd 6623 Thrust Washer 1.38" X .031" As Req'd 64724 Thrust Washer 1.38"...
  • Page 70 BOOM & DIPPER ASSEMBLY ASSEMBLY #81813 UP TO SERIAL #8408AX972 7451 6-4-98...
  • Page 71 BOOM & DIPPER ASSEMBLY ASSEMBLY #81813 UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 6615 Self Aligning Bushing (Included in Cylinder Assemblies) 81611 Boom Cylinder Assembly 53031 90° Grease Zerk As Req'd 6623 Thrust Washer 1.38" X .031" As Req'd 64724 Thrust Washer 1.38"...
  • Page 72 BOOM & DIPPER ASSEMBLY ASSEMBLY #81813 UP TO SERIAL #8408AX972 BUCKET (NOT INCLUDED IN BOOM & DIPPER ASSEMBLY) 7453 6-4-98...
  • Page 73 BOOM & DIPPER ASSEMBLY ASSEMBLY #81813 UP TO SERIAL #8408AX972 REQ'D PART NO. DESCRIPTION 6615 Self Aligning Bushing (Included in Cylinder Assembly) 81634 Bucket Cylinder Assembly 53031 90° Grease Zerk 6616 Grease Zerk 1650 Snap Ring As Req'd 6623 Thrust Washer 1.38"...
  • Page 74 CONSOLE ASSEMBLY ASSEMBLY #85701 7382 12-17-99-2...
  • Page 75 CONSOLE ASSEMBLY ASSEMBLY #85701 REQ'D PART NO. DESCRIPTION 1958 .25" UNC X .75" Hex Head Body Bolt 86649 Console Cover with Decals 85838 Ball Handle 85839 Control Handle - Left 85840 Control Handle - Right 83235 Control Lever Boot 2558 M10 Hex Nut 85826 Boot Support Plate...
  • Page 76 VALVE ASSEMBLY ASSEMBLY #2233 7386 12-16-99-2...
  • Page 77 VALVE ASSEMBLY ASSEMBLY #2233 REQ'D PART NO. DESCRIPTION 3269 Straight Adapter 8MBo - 6MJ 3457 Straight Adapter 6MBo - 6MJ 30185 Adapter 6MBo - 6MJ (.076 Restrictor) 30187 Swivel Adapter 4FP - 6FJX 3185 Needle Valve (Speed Control) 3137 Straight Adapter 4MP - 6MJ 3430 90°...
  • Page 78 VALVE ASSEMBLY HIDROIRMA VALVE #85511 STABILIZER SECTION BUCKET SECTION #45724 SWING SECTION #45725 #45723 DIPPER SECTION BOOM SECTION #45726 #45722 ENDCAP WITH RE- TURN #45728 ENDCAP WITH RELIEF #45727 7384 12-16-99-2...
  • Page 79 VALVE ASSEMBLY HIDROIRMA VALVE #85511 SERVICE PARTS REQ'D PART NO. DESCRIPTION 45702 Screw 45704 Joystick Plate - Left 45705 Joystick Plate - Right 45706 45707 Washer 45708 Terminal With Stud 45709 Joystick Spool Pin 45710 Terminal 45711 Bushing 45712 Left Joystick Support 45713 Right Joystick Support 45717...
  • Page 80 VALVE ASSEMBLY REPLACEMENT PARTS - HYDROIRMA VALVE 7388 12-11-98-2...
  • Page 81 VALVE ASSEMBLY REPLACEMENT PARTS - HIDROIRMA VALVE REQ'D PART NO. DESCRIPTION 3341 Plug 8MBo 3306 Replacement O'Ring 45736 Tie Rod Assembly (Includes Nuts & Washers) 45720 Section Seal Kit 45731 Restrictor .076 45732 Restrictor .109 45714 Circuit Relief With Anti-Cav. @ 2500 PSI 45715 Circuit Relief With Anti-Cav.
  • Page 82 CONSOLE ASSEMBLY ASSEMBLY #83372 6710 8-28-96-2...
  • Page 83 CONSOLE ASSEMBLY ASSEMBLY #83372 REQ'D PART NO. DESCRIPTION 83406 Ball Handle - RED 83273 82795 Spring 83409 Console Cover with Decals 1939 .25" UNC X .75" Flange Head Hex Capscrew 83063 Ball Handle 81871 Control Handle 83235 Control Lever Boot 1242 .50"...
  • Page 84 VALVE ASSEMBLY ASSEMBLY #2230 6718 8-28-96-2...
  • Page 85 VALVE ASSEMBLY ASSEMBLY #2230 REQ'D PART NO. DESCRIPTION 81517 Valve - 6 Spool - Gresen 3368 O'Ring Adapter 8MBo-4FP 3088 90° Adapter 4MP-6MJ 3336 O'Ring Adapter 10MBo-4FP 3283 90° Adapter 10MBo-8MJ 3001 90° Adapter 4MP-6MJ 3185 Needle Valve 3137 Male Connector 4MP-6MJ 45633 Restrictor with Spring - .076 Dia.
  • Page 86 VALVE ASSEMBLY 408 BACKHOE VALVE ASSEMBLY LEFT MECHANICAL JOYSTICK RIGHT MECHANICAL JOYSTICK ASSEMBLY #45655 ASSEMBLY #45656 INLET OUTLET #4710 #4690 DIPPER #45648 BOOM #45651 SWING #45665 BUCKET #45648 LEFT STABILIZER #4704 RIGHT STABILIZER #4704 6962 9-21-98-2...
  • Page 87 VALVE ASSEMBLY GRESEN INLET COVER TORQUE TO 20 ft. lbs. TORQUE TO 14 ft. lbs. 6967 5-22-96...
  • Page 88 VALVE ASSEMBLY GRESEN INLET COVER REQ'D PART NO. DESCRIPTION 4710 Inlet Cover #10 Ports 45148 WH Main Relief Valve Assembly @ 2250 PSI NOTES: Valve Section Seal Kit #4653 contains (3) Exhaust Passage O-Ring Seals and (2) Pressure Passage O-Ring Seals 6968 5-22-96...
  • Page 89 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45648 408 Dipper & Bucket Section 509, 511, 609 & 611 Dipper Section TORQUE TO TORQUE TO 14 ft. lbs. 10 ft. lbs. TORQUE TO 20 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 20 ft.
  • Page 90 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45648 408 Dipper & Bucket Section 509, 511, 609 & 611 Dipper Section REQ'D PART NO. DESCRIPTION Valve Section Housing 45667 Cylinder Port Relief Assembly @ 2500 PSI 45653 Spool Clevis Adapter 45652 Spool Seal Kit Spool 45282 Spool Positioner Assembly...
  • Page 91 VALVE ASSEMBLY GRESEN VALVE STABILIZER SECTION ASSEMBLY #4704 Horizontal Handle Assembly #45586 (Not included in Valve Section Assembly #4704) TORQUE TO 20 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 20 ft. lbs. 6947 5-20-96...
  • Page 92 VALVE ASSEMBLY GRESEN VALVE STABILIZER SECTION ASSEMBLY #4704 REQ'D PART NO. DESCRIPTION Valve Section Housing 4819 Lockout Check Assembly 45652 Spool Seal Kit Spool 45282 Spool Positioner Assembly 45654 Unlocking Piston NOTES: Items without part numbers are not sold separately. Valve Section Seal Kit #4653 contains (3) Exhaust Passage O-Ring Seals and (2) Pressure Passage O-Ring Seals.
  • Page 93 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45665 408 Swing Section TORQUE TO 14 ft. lbs. TORQUE TO 20 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 20 ft. lbs. TORQUE TO 14 ft. lbs. 6969 9-21-98-2...
  • Page 94 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45665 408 Swing Section REQ'D PART NO. DESCRIPTION Valve Section Housing 45139 Cylinder Port Relief / Anti-Cav. Check Assembly @ 2250 PSI 45653 Spool Clevis Adapter 45652 Spool Seal Kit Spool 45282 Spool Positioner Assembly INCLUDED IN VALVE ASSEMBLY BUT NOT IN VALVE SECTION 45633 Restrictor with Spring - .076 Dia.
  • Page 95 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45651 408 Boom Section TORQUE TO 14 ft. lbs. TORQUE TO 20 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 10 ft. lbs. TORQUE TO 20 ft. lbs. TORQUE TO 14 ft. lbs. 6971 9-21-98-2...
  • Page 96 VALVE ASSEMBLY GRESEN VALVE SECTION ASSEMBLY #45651 408 Boom Section REQ'D PART NO. DESCRIPTION Valve Section Housing 45667 Cylinder Port Relief Assembly @ 2500 PSI 45653 Spool Clevis Adapter 45652 Spool Seal Kit Spool 45282 Spool Positioner Assembly INCLUDED IN VALVE ASSEMBLY BUT NOT IN VALVE SECTION 45546 Restrictor with Spring - .095 Dia.
  • Page 97 VALVE ASSEMBLY GRESEN OUTLET COVER TORQUE TO 20 ft. lbs. OPTIONAL TORQUE TO 20 ft. lbs. 6955 5-20-96...
  • Page 98 VALVE ASSEMBLY GRESEN OUTLET COVER REQ'D PART NO. DESCRIPTION 4690 Outlet Cover 4691 Open Center Plug Assembly (Includes Open Center Plug & Main O-Ring Seal #4693) 3234 Plug OPTIONAL 6977 Closed Center Plug Assembly (Includes Main O-Ring Seal #4693) 4698 Power Beyond Sleeve Assembly (Includes Main O-Ring Seal #4693) NOTES:...
  • Page 99 VALVE ASSEMBLY LEFT MECHANICAL JOYSTICK ASSEMBLY #45655 RIGHT MECHANICAL JOYSTICK ASSEMBLY #45656 6959 5-16-96...
  • Page 100 VALVE ASSEMBLY LEFT MECHANICAL JOYSTICK ASSEMBLY #45655 RIGHT MECHANICAL JOYSTICK ASSEMBLY #45656 REQ'D PART NO. DESCRIPTION 45657 Mounting Plate 1943 Screw 45664 Rod End 45662 Mechanical Slide 1945 Screw 1944 Screw 45658 Bracket - Left 45659 Bracket - Right 45661 Rod End Stud 1271 Screw...
  • Page 101 VALVE ASSEMBLY Horizontal Handle and Bracket Assembly #45586 TORQUE TO 10 ft. lbs. 5997 5-21-96-2...
  • Page 102 VALVE ASSEMBLY Horizontal Handle and Bracket Assembly #45586 REQ'D PART NO. DESCRIPTION Handle Cotter Pin Link Link Plate Screw Bracket NOTE: All parts marked with an asterisk (*) are included in Horizontal Handle and Bracket Assembly #45586. Parts are not sold separately. 5998 5-21-96-2...
  • Page 103 VALVE ASSEMBLY GRESEN VALVE SERVICE PARTS Spool Positioner Assembly Cylinder Port Relief Assembly Lockout Check Assembly Cylinder Port Relief/Anti Cav. Check Assembly Port Restrictor and Spring Assembly WH Main Relief Valve Assembly 6973 5-22-96...
  • Page 104 VALVE ASSEMBLY GRESEN VALVE SERVICE PARTS PART NO. DESCRIPTION 45282 Spool Positioner Assembly Bonnet Spring Spring Collar Spool Spud Screw 45667 Cylinder Port Relief Assembly @ 2500 PSI (Due to close tolerances only the seals may be serviced in the field.) 4822 Seal Kit O-Ring Seal...
  • Page 105 CYLINDER ASSEMBLY SWING CYLINDER ASSEMBLY #81827 6692 12-4-95...
  • Page 106 CYLINDER ASSEMBLY SWING CYLINDER ASSEMBLY #81827 REQ'D PART NO. DESCRIPTION 81024 Cylinder Rod 77458 Cylinder Gland 82441 Needle Bearing 81960 Cylinder Tube 81963 Piston 1483 Hex Nut 62523 Self Aligning Bushing 4 5 3 8 9 * Rod Wiper 4 5 2 5 0 * O'Ring 4 5 2 1 9 * Poly Pak Seal...
  • Page 107 CYLINDER ASSEMBLY STABILIZER CYLINDER ASSEMBLY #83397 6698 12-4-95...
  • Page 108 CYLINDER ASSEMBLY STABILIZER CYLINDER ASSEMBLY #83397 (1.25" DIAMETER CYLINDER ROD) REQ'D PART NO. DESCRIPTION 83398 Cylinder Tube 1483 Hex Nut 50252 Piston 77458 Cylinder Gland 83399 Cylinder Rod 4 6 4 5 * O'Ring 4 6 4 4 * Piston Ring 4 6 4 1 * O'Ring 5421...
  • Page 109 CYLINDER ASSEMBLY BOOM CYLINDER ASSEMBLY #85663 SERIAL #8408AX973 AND UP 7469 6-9-98...
  • Page 110 CYLINDER ASSEMBLY BOOM CYLINDER ASSEMBLY #85663 SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 85664 Cylinder Tube 1483 Hex Nut 4 5 2 5 0 * O'Ring 4 5 2 5 1 * Piston Ring 4 6 4 1 * O'Ring 4 5 2 4 8 * O'Ring...
  • Page 111 CYLINDER ASSEMBLY BOOM CYLINDER ASSEMBLY #81611 6694 12-4-95...
  • Page 112 CYLINDER ASSEMBLY BOOM CYLINDER ASSEMBLY #81611 REQ'D PART NO. DESCRIPTION 81612 Cylinder Tube 1483 Hex Nut 82857 Piston 82449 Cylinder Gland 82450 Cylinder Rod 6615 Self Aligning Bushing 4 5 2 5 0 * O'Ring 4 5 2 5 1 * Piston Ring 4 6 4 1 * O'Ring...
  • Page 113 CYLINDER ASSEMBLY DIPPER CYLINDER ASSEMBLY #85672 SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 85673 Cylinder Tube 1483 Hex Nut 4 5 2 5 0 * O'Ring 4 5 2 5 1 * Piston Ring 4 6 4 1 * O'Ring 4 5 2 4 8 * O'Ring...
  • Page 114 CYLINDER ASSEMBLY DIPPER CYLINDER ASSEMBLY #81641 6696 12-4-95...
  • Page 115 CYLINDER ASSEMBLY DIPPER CYLINDER ASSEMBLY #81641 REQ'D PART NO. DESCRIPTION 81642 Cylinder Tube 1483 Hex Nut 83113 Piston 82449 Cylinder Gland 81643 Cylinder Rod 6615 Self Aligning Bushing 4 5 2 5 0 * O'Ring 4 5 2 5 1 * Piston Ring 4 6 4 1 * O'Ring...
  • Page 116 CYLINDER ASSEMBLY BUCKET CYLINDER ASSEMBLY #85677 SERIAL #8408AX973 AND UP 7473 6-9-98...
  • Page 117 CYLINDER ASSEMBLY BUCKET CYLINDER ASSEMBLY #85677 SERIAL #8408AX973 AND UP REQ'D PART NO. DESCRIPTION 85678 Cylinder Tube 1483 Hex Nut 4 6 4 4 * Piston Ring 4 6 4 5 * O'Ring 4 6 4 1 * O'Ring 5421 Spacer 4 5 0 9 * O'Ring...
  • Page 118 CYLINDER ASSEMBLY BUCKET CYLINDER ASSEMBLY #81634 6690 12-4-95...
  • Page 119 CYLINDER ASSEMBLY BUCKET CYLINDER ASSEMBLY #81634 REQ'D PART NO. DESCRIPTION 81635 Cylinder Tube 1483 Hex Nut 50252 Piston 77458 Cylinder Gland 81636 Cylinder Rod 6615 Self Aligning Bushing 4 6 4 5 * O'Ring 4 6 4 4 * Piston Ring 4 6 4 1 * O'Ring 5421...
  • Page 121 MAINFRAME HOSE SET ASSEMBLY #83408 408A BACKHOE SN #11870 & UP 509A BACKHOE SN #11640 & UP REQ'D PART NO. DESCRIPTION 37675 Hose Assembly .25" X 56" 6FJX-6FJX 37700 Hose Assembly .25" X 12" 6FJX-6FJX 45° Gooseneck 37552 Hose Assembly .25"...
  • Page 122 MAINFRAME HOSE SET ASSEMBLY #83408 408A BACKHOE UP TO SERIAL #11870 509A BACKHOE UP TO SERIAL #11640 HYDRAULIC CONTROL VALVE B C D MAINFRAME RIGHT STABILIZER CYLINDER SWING CYLINDERS #30137 TEE LEFT STABILIZER (LOCATED IN MAINFRAME ASSEMBLY) CYLINDER 6700 12-17-99-3...
  • Page 123 MAINFRAME HOSE SET ASSEMBLY #83408 408A BACKHOE UP TO SERIAL #11870 509A BACKHOE UP TO SERIAL #11640 REQ'D PART NO. DESCRIPTION 37675 Hose Assembly .25" X 56" 6FJX-6FJX 37522 Hose Assembly .25" X 16.35" 6FJX-6FJX 90° Gooseneck 37552 Hose Assembly .25"...
  • Page 124 BOOM & DIPPER HOSE SET (HIDROIRMA VALVE) ASSEMBLY #85918 HIIDROIRMA HYDRAULIC CONTROL VALVE DIPPER CYLINDER BOOM CYLINDER MAINFRAME BOOM (CUTAWAY VIEW) SWING POST DIPPER BUCKET CYLINDER 7467 6-8-98...
  • Page 125 BOOM & DIPPER HOSE SET (HIDROIRMA VALVE) ASSEMBLY #85918 REQ'D PART NO. DESCRIPTION 37669 Hose Assembly .38" X 82" 6FJX-6FJX 37670 Hose Assembly .38" X 131" 6FJX-6FJX NOTE: Letters on the hose set diagram show the hydaulic hose routing between the backhoe control valve and the various hydraulic cylinders. Simply match the letter on the control valve port to the same letter on the hydraulic hose ends.
  • Page 126 BOOM & DIPPER HOSE SET ASSEMBLY #81877 HYDRAULIC CONTROL VALVE DIPPER CYLINDER BOOM CYLINDER MAINFRAME BOOM (CUTAWAY VIEW) SWING POST DIPPER BUCKET CYLINDER 6708 9-21-98-2...
  • Page 127 BOOM & DIPPER HOSE SET ASSEMBLY #81877 REQ'D PART NO. DESCRIPTION 37523 Hose Assembly .38" X 80" 6FJX-6FJX 37524 Hose Assembly .38" X 129" 6FJX-6FJX NOTE: Letters on the hose set diagram show the hydaulic hose routing between the backhoe control valve and the various hydraulic cylinders. Simply match the letter on the control valve port to the same letter on the hydraulic hose ends.
  • Page 128 STABILIZER PADS 6733 12-12-95...
  • Page 129 STABILIZER PADS REQ'D PART NO. DESCRIPTION FLAT STABILIZER PAD ASSEMBLY - #81861 81865 Flat Stabilizer Pad GROUSER STABILIZER PAD ASSEMBLY - #81860 83421 Grouser Stabilizer Pad RUBBER STABILIZER PAD ASSEMBLY - #81862 83418 Rubber Stabilizer Pad Assembly (Includes Items 4 through 10) 83419 Stabilizer Pad 1226...
  • Page 130 STABILIZER PADS FLIP-OVER STABILIZER PAD ASSEMBLY #83091 (COMPLETE SET OF (2) FLIP-OVER PADS - ASSEMBLY #83058) 7023 11-1-96...
  • Page 131 STABILIZER PADS FLIP-OVER STABILIZER PAD ASSEMBLY #83091 (COMPLETE SET OF (2) FLIP-OVER PADS - ASSEMBLY #83058) REQ'D PART NO. DESCRIPTION 84496 Flip-Over Pad 84495 Spacer 1652 1.25" Snap Ring VARIES 57693 Thrust Washer 1.25" X .078" VARIES 64727 Thrust Washer 1.25"...
  • Page 132 OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER STABILIZER CYLINDER COVER ASSEMBLY #83850 7025 11-1-96...
  • Page 133 OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER OPTIONAL STABILIZER CYLINDER COVER STABILIZER CYLINDER COVER ASSEMBLY #83850 REQ'D PART NO. DESCRIPTION 83915 Stabilizer Cylinder Cover with Decal 4167 No Step Decal 83910 1.25"...
  • Page 134 BUCKET ASSEMBLIES 6735 12-12-95...
  • Page 135 BUCKET ASSEMBLIES PART NO. DESCRIPTION 6616 Replacement Grease Zerk 81824 Replacement Bucket Link (Requires (3) #6616 Grease Zerks, (4) #81610 Bushings, (1) #83368 Spacer) 83368 Replacement Spacer 81610 Replacement Bushing 81710 10" Bucket Weldment 81712 12" Bucket Weldment 81716 16" Bucket Weldment 81718 18"...
  • Page 136 FIRST LINE REPAIR KIT ASSEMBLY #83649 6729 12-8-95...
  • Page 137 FIRST LINE REPAIR KIT ASSEMBLY #83649 REQ'D PART NO. DESCRIPTION 45617 Seal Kit (Swing/Stabilizer/Bucket Cylinders) 45618 Seal Kit (Boom/Dipper Cylinders) 6886 Rubber Bumper 81610 Bushing 6616 Grease Zerk 6397 Bucket Tooth 1650 Snap Ring 1.38" 6623 Thrust Washer 1.38" X .031" 65349 Cylinder Seal Install Tool 1613...
  • Page 138 DECAL ASSEMBLY ASSEMBLY #40253 6716 12-26-95...
  • Page 139 DECAL ASSEMBLY ASSEMBLY #40253 REQ'D PART NO. DESCRIPTION 4368 Operating Controls Decal 40257 Important Decal 4247 Swing Speed Decal 40255 Operational Warning Decal 4170 Petcock Operation Decal 40151 High Pressure Fluid Decal 40249 Swing Lock Decal 4338 Made In U.S.A. 40219 Boom Lock Decal 4084...

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