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Lastec Articulator
Model 425HD/MD
Owner's Manual
Serial Numbers
Master
The Articulator
from Lastec,
A Division of Wood-Mizer Products, Inc.
8180 West 10th Street
Indianapolis, Indiana 46214
Phone (317) 808-0703 Fax (317) 808-0704
www.lastec.com

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Summary of Contents for Lastec 425HD

  • Page 1 Lastec Articulator Model 425HD/MD Owner’s Manual Serial Numbers Master The Articulator from Lastec, A Division of Wood-Mizer Products, Inc. 8180 West 10th Street Indianapolis, Indiana 46214 Phone (317) 808-0703 Fax (317) 808-0704 www.lastec.com...
  • Page 2: Table Of Contents

    Section-Page SECTION 1: TO THE OWNER Read This Manual In Its Entirety BEFORE Operating The Articulator ..1-2 Product Registration..................1-2 Lastec Product Warranty................1-3 LastecComponent Manufacturers’ Warranties ..........1-5 Servicing The Articulator ................1-5 Warranty Registration................... 1-7 SECTION 2: SAFETY INFORMATION Warning Symbols ..................
  • Page 3 Steering Control Arms ................3-17 3.21 Lights......................3-17 3.22 Mower Deck Height ................... 3-18 3.23 Mower Deck Height Cable Calibration (425HD)......... 3-19 3.24 Mower Deck Height Cable Calibration (425MD) ........3-20 3.25 Tires & Wheels ................... 3-21 3.26 General....................... 3-21 3.27...
  • Page 4 Every 800 Hours................... 5-4 5.10 Annual ......................5-4 5.11 5.12 Bi-Annual...................... 2-4 Maintenance Schedule................. 5-5 5.13 Model 425HD-MD Articulator Specifications ..........5-6 5.14 Hydraulic System Diagram (425HD) ............5-8 5.15 Hydraulic System Diagram (425MD)............5-10 5.16 Electrical Schematic ................... 5-11 5.17 Deck Belt Illustration...................
  • Page 5: To The Owner

    To The Owner SECTION 1: TO THE OWNER To The Owner 425HD-MD/masterdoc101602...
  • Page 6: Read This Manual In Its Entirety Before Operating The Articulator

    You should now fill out the warranty registration form (located in the back of this section) and mail or fax it to Lastec. This form must be completed and returned to the factory within fifteen (15) days of purchase in order to validate the warranty. Please do not hesi-...
  • Page 7: Lastec Product Warranty

    8180 W. 10th Street, Indinanpolis, Indiana, 46214, warrants as stated herein to the origi- nal purchaser and any subsequent purchaser (“purchaser”) for twelve (12) months or 1000 hours of equipment use from the date of purchase from Lastec (“warrantor”) that the equipment manufactured by warrantor and any optional equipment or accessories pur-...
  • Page 8 To The Owner Lastec Product Warranty EXCEPT FOR THE EXPRESS WARRANTY PROVISIONS STATED ABOVE, WARRAN- TOR DISCLAIMS ALL WARRANTIES, EXPRESS AND/OR IMPLIED, INCLUDING WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. No representation or other affirmation of fact...
  • Page 9: Lasteccomponent Manufacturers' Warranties

    Be sure to complete the following Lastec Warranty Registration Form and return to Lastec within 15 days of the purchase of your Articulator. This will aid you, Lastec, and your Lastec dealer in the warranting and servicing of your Articulator.
  • Page 10 LASTEC This Page Has Been Intentionally Left Blank...
  • Page 11: Warranty Registration

    How did you hear about Lastec? Who referred you to the Articulator? Who was the salesman that assisted you? Please check the box to your left if you would not allow Lastec to use your company's name for marketing purposes. To The Owner 425HD-MD/masterdoc101602...
  • Page 12 LASTEC This Page Has Been Intentionally Left Blank...
  • Page 13: Safety Information

    Safety Information SECTION 2: SAFETY INFORMATION Safety Information 425HD-MD/masterdoc101602...
  • Page 14: Warning Symbols

    Hazards such as damage to equipment, serious personal injury, or even fatal injury are possible, perhaps even likely, if the accompanying instructions or procedures are not heeded. 425HD-MD/masterdoc101602 Safety Information...
  • Page 15: About This Manual

    The illustrations and data used in this manual were current at the time of printing, but the Articulator may vary slightly due to ongoing engineering changes. LasTec reserves the right to implement engineering and design changes to the Articulator as may be neces- sary without prior notification.
  • Page 16: Safety Guards And Covers

    -- never operate the Articulator with any of the safety covers removed! Safety is a primary concern in the design and manufacture of all LasTec products. Unfor- tunately, our extensive efforts to provide safe equipment can be negated by a single care- less act of an operator.
  • Page 17: Preparational Safety Rules

    Always perform the pre-operation equipment inspection and the appropriate mainte- nance schedule (Section 5) before operating the Articulator. Do not change the engine governor settings or over-speed the engine. Safety Information 425HD-MD/masterdoc101602...
  • Page 18: Operational Safety Rules

    Do not stop or start suddenly when going up or down a hill. Avoid operating on steep slopes. Do not mow in reverse unless absolutely necessary - and then only after careful observation of entire area behind the Articulator. Use extreme care and maintain minimum ground speed when transporting on a hill- 425HD-MD/masterdoc101602 Safety Information...
  • Page 19 Articulator while the engine is running or hot; never fuel the Articulator indoors; always clean up any spilled fuel; never smoke around fuel. Do not allow extended running of engine indoors - exhaust fumes are deadly. Safety Information 425HD-MD/masterdoc101602...
  • Page 20: Maintenance Safety Rules

    Upon completing any maintenance or service function, verify that all safety guards and devices are properly installed before operating the Articulator. Verify that all warning labels and decals are properly installed, visible, and legible. Always remove debris from underneath the Articulator after each use. 425HD-MD/masterdoc101602 Safety Information...
  • Page 21: Storage Safety Rules

    Sand chipped or scratched areas and re-paint them to prevent rust during storage. Grease all grease fittings and lubricate all moving parts of the Articulator to prevent rust during storage. Safety Information 425HD-MD/masterdoc101602...
  • Page 22 LASTEC This Page Has Been Intentionally Left Blank...
  • Page 23: 425Hd-Md Initial Setup

    425HD-MD INITIAL SETUP SECTION 3: 425HD-MD INITIAL SETUP 425HD-MD INITIAL SETUP 425HD-MD/masterdoc101602...
  • Page 24: Assembly

    425HD-MD INITIAL SETUP Assembly Assembly The Model 425HD-MD Articulator requires a minimum amount of assembly before opera- tion. Follow the steps below to assemble the Articulator: 1. Remove the loose deck (deck 1) and the rocker assembly from the skid.
  • Page 25: Parking Brake

    425HD-MD INITIAL SETUP Parking Brake 12. The deck lift cables(425HD Only) are factory calibrated. The adjustment nuts on the deck 1 cable are locked into position during shipping, eliminating the need for adjustment after re-assembly. Simply install the cable into the mount plate on the side of the rocker assembly.
  • Page 26: Fuel

    The Model 425HD-MD Articulator is equipped with an 8.5 gallon fuel tank, which is located behind the left fender. The Articulator is shipped dry (no fuel) from the factory, so you will need to fuel the Articulator before operating.
  • Page 27: Engine Cover/Operator Seat Pan

    425HD-MD INITIAL SETUP Engine Cover/Operator Seat Pan Engine Cover/Operator Seat Pan Always clean the entire engine area and deck area of any excess grease, oil, fuel, or debris to prevent damage to the equipment, fire hazard, and projectile hazards! In order to fully access the mower deck, many of the drive components or controls, or the...
  • Page 28: Engine Oil

    425HD-MD INITIAL SETUP Engine Oil Engine Oil Be sure to use the correct oil in the engine crankcase! Be sure to check the engine oil level and quality daily! Incorrect oil, inadequate oil level, or contaminated oil will cause engine damage!
  • Page 29: Coolant

    425HD-MD INITIAL SETUP Coolant Coolant The radiator is pressurized! NEVER check the coolant while the engine is running! COOLANT IS HOT! Always allow ample time for coolant to cool before checking, changing, or repairing leaks! Clean Radiator Daily! Overheating may occur if radiator is not cleaned daily.
  • Page 30: Hydraulic Fluid

    The Model 425HD-MD Articulator uses a specific type of oil in the hydraulic system. This oil is formulated to prolong the life of the hydraulic pumps. LasTec has developed a kit, which contains (2) 2 1/2 gallon reusable containers of oil and (2) oil filters. This is enough oil and filters for (2) complete hydraulic system oil changes (system capacity is approxi- mately 7 quarts).
  • Page 31: Hydraulic Pump Adjustment

    425HD-MD INITIAL SETUP Hydraulic Pump Adjustment 3.10 Hydraulic Pump Adjustment Always use jack stands when adjusting the hydro pumps! Keep everyone clear of all controls while adjusting the hydro pumps! Occasionally, you may need to adjust the hydraulic pumps to keep the drive wheels from creeping.
  • Page 32: Hydraulic Pump Belts

    If you are unable to install a new belt with the pump pivoted to its closest proximity to the engine drive pulley, it is likely you are installing the wrong size belt. Contact your LasTec dealer for proper belt lengths for your Articulator.
  • Page 33: Gearbox

    425HD-MD INITIAL SETUP Gearbox 3.13 Gearbox Be sure to use the correct fluid in the gearbox! Check fluid level and quality daily! Incorrect fluid, inadequate fluid level, or contaminated fluid will cause gearbox damage! Check the oil level and condition in the gearbox. The gearbox should be approximately half full (16 ounces).
  • Page 34: Gearbox Belts

    425HD-MD INITIAL SETUP Gearbox Belts 3.14 Gearbox Belts NEVER inspect, adjust, or change the gearbox belt while the engine is running! Gearbox Drive Belt Tension Is PRESET. Increasing The Spring Tension Could Cause Serious Damage. Improper gearbox belt tension can cause serious damage to the...
  • Page 35: Mower Deck Drive Belt

    If the belt you are check- ing is new, and the idler tensioner goes to its maximum stroke without adequately tightening the belt, it is likely you have installed the wrong size belt. Contact your LasTec dealer for the proper belt lengths for your Articulator.
  • Page 36: Mower Deck Belts

    If the belt you are check- ing is new, and the idler tensioner pivots to its maximum stroke without adequately tightening the belt, it is likely you have installed the wrong size belt. Contact your LasTec dealer for the proper belt lengths for your Articulator.
  • Page 37: Weight Transfer Springs

    425HD-MD INITIAL SETUP Weight Transfer Springs 3.18 Weight Transfer Springs It is important that the weight transfer system is operating properly. The weight transfer springs help to lighten the mower deck by transferring excess weight to the drive unit. The elimination of excess weight allows more agile floating of the mower deck, resulting in a higher quality cut and a lower incidence of turf damage.
  • Page 38: Blades

    Always replace any damaged, dull, or missing blades before operating the Articulator. LasTec also offers low-lift blades and mulching blades for certain mowing applications. Contact your LasTec dealer for further information about optional blades available.
  • Page 39: Operator Seat

    425HD-MD INITIAL SETUP Operator Seat 3.20 Operator Seat Check that the operator seat pan is properly latched and operator seat is secure. Be sure the seatbelt is secure and operable. Adjust the seat forward or back so that the operator can easily reach the control panel, steering control arms, and mower deck height adjustment pedal.
  • Page 40: Mower Deck Height

    NEVER attempt to change the cutting deck height while the engine is running! The Model 425HD-MD Articulator has a mower deck height range of 1" to 4 1/2", in 1/4" increments. If you wish to change the deck height, do so before attempting to operate the Articulator.
  • Page 41: Mower Deck Height Cable Calibration (425Hd)

    ALWAYS be sure to set the parking brake before making any adjustments to the Articulator! Occasionally, you will need to calibrate the mower deck height cables (425HD Only). Fol- low these procedures to calibrate: 1. Park the Articulator on a flat, level surface. Be sure to turn off the engine and set the park- ing brake before making any adjustments to the Articulator.
  • Page 42: Mower Deck Height Cable Calibration (425Md)

    425HD-MD INITIAL SETUP Mower Deck Height Cable Calibration (425MD) 3.25 Mower Deck Height Cable Calibration (425MD) Occasionally, you will need to calibrate the mower deck height. Follow these procedures to calibrate: 1. Park the Articulator on a flat, level surface. Be sure to turn off the engine and set the park- ing brakes before making any adjustments to the Articulator.
  • Page 43: Tires & Wheels

    425HD-MD INITIAL SETUP Tires & Wheels 3.26 Tires & Wheels All tires are foam filled with the exception of the rear drive tires. Check the air pressure in the rear drive tires. Maintain an air pressure amount of 10psi. Verify proper function of all mower deck gauge wheels. The wheels should turn freely without excessive side-to-side motion, and be free of debris.
  • Page 44: Battery

    425HD-MD INITIAL SETUP Battery 3.28 Battery EXPLOSIVE GAS! Batteries produce explosive hydrogen gas while being charged! Always charge batteries in a well-ventilated area! Keep all batteries out of the reach of children! The Articulator utilizes a 12-volt battery. Ratings: CA@32°F=680; CCA@0°F=540. The battery is located inside the covered utility box behind the right rear fender.
  • Page 45: Engine

    425HD-MD INITIAL SETUP Engine Use extreme care to avoid spilling or splashing electrolyte (which is dilute sulfuric acid) as it can destroy clothing and burn the skin. If electrolyte is spilled or splashed on clothing or the body, it should be neutralized immediately and then rinsed with clean water. A solu- tion of baking soda, or household ammonia, and water may be used as a neutralizer.
  • Page 46: Mower Deck Lift

    Articulator! The Model 425HD-MD Articulator is equipped with hydraulic deck lift arms which lift the deck of the unit. Test the operation of the hydraulic deck lift arms while the engine is running. Be sure the blades are NOT engaged.
  • Page 47: Maintenance Checklist

    Check the gearbox belts for proper tension and condition. Gearbox Drive Belt Tension Is PRESET. Increasing The Spring Tension Could Cause Serious Damage. Use LasTec Part No. 018818 ONLY. Check the mower deck drive belt and idler tension spring for proper installation, tension and condition.
  • Page 48 425HD-MD INITIAL SETUP Pre-Operation Equipment Inspection Checklist Inspect entire Articulator for loose or entangled parts, debris, obstructions, or neglected tools. Verify that the battery has sufficient charge to start the engine. Check engine for abnormal exhaust or sounds. Check oil pressure and coolant temperature lights.
  • Page 49: Operating Procedures

    Operating Procedures SECTION 4: OPERATING PROCEDURES Operating Procedures 425HD-MD/masterdoc101602...
  • Page 50: Starting The Engine

    Activation of these switches is indicated by the operator present and neutral start lights on the control panel (the two green lights directly above the key switch). Turn the key switch clockwise to the RUN position. If both green indicator lights are activated, you are ready to start the engine. 425HD-MD/masterdoc101602 Operating Procedures...
  • Page 51: Stopping The Engine

    Stop the engine by throttling down to a slow idle, then turning the ignition key switch to the OFF position. Wait for all motion to stop. Be sure all auxiliary switches are in the OFF position. Set the parking brake before dismounting the Articulator. Operating Procedures 425HD-MD/masterdoc101602...
  • Page 52: Motion Control

    ALWAYS verify that all safety covers are in place and secure before operating the Articulator! The Model 425HD-MD Articulator is equipped with two hydraulic pumps, one operating each rear drive wheel. These pumps are controlled separately with each of the steering control arms (located to the left and right of the operator seat).
  • Page 53: Ground Speed

    Articulator. Ground Speed The Model 425HD-MD Articulator is designed to cut cleanly and efficiently at relatively high ground speeds. Reduced ground speed is required when operating on severe con- tours, when cutting excessively tall, wet, or thick grass, or when traveling up or down large or steep hills.
  • Page 54: Mower Deck Operation

    ALWAYS stay well clear of blades during operation! NEVER operate the Articulator when children are present! The Model 425HD-MD Articulator is equipped with a 96" wide mower deck, which is com- prised of four independently articulating 25" decks. All four decks are belt driven - the drive belt (located under the operator seat pan between the gearbox and the main deck) drives the main deck, and the deck belts (running between the decks) drive each deck.
  • Page 55: Maintenance

    Maintenance SECTION 5: MAINTENANCE Maintenance 425HD-MD/masterdoc101602...
  • Page 56: Every 8 Operating Hours Or Daily

    Calibrate cables if needed. Verify proper installation, operation, and flow of grass chute. Inspect entire Articulator for loose or entangled parts, debris, obstructions, neglected tools, or any other possible safety hazards, equipment hazards or projec- tile hazards. 425HD-MD/masterdoc101602 Maintenance...
  • Page 57: First 25 Operating Hours

    Change engine oil and filter. Grease the gearbox. Change the hydraulic oil & filter. Every 400 Operating Hours Replace Fuel Filter Cartridge. 1. Refer to the Kubota Diesel Engine Operator’s Manual located in the back of this manual. Maintenance 425HD-MD/masterdoc101602...
  • Page 58: Every 500 Hours

    Replace air cleaner filter elements. Change the hydraulic oil & filter. 5.12 Bi-Annual Replace fuel pipes and clamps. Replace radiator hoses and clamps. Replace battery. 1. Refer to the Kubota Diesel Engine Operator’s Manual located at the back of this manual. 425HD-MD/masterdoc101602 Maintenance...
  • Page 60: Model 425Hd-Md Articulator Specifications

    Maintenance Model 425HD-MD Articulator Specifications 5.14 Model 425HD-MD Articulator Specifications Mower Deck Mower Deck Configuration (4) 25” Articulating Decks Width 96” Blades (4) 25” High-Lift P701 Blade, 25" Low Lift P849 Blade, 25" Gator Mulching P848 Blade Tip Speed Normal Operating Range Of 15,000 to 18,000 Mower Deck Height Range 1”...
  • Page 61 Maintenance Model 425HD-MD Articulator Specifications Engine Model Kubota V1505-E Water-Cooled Diesel 027824 Bore & Stroke 74mm x 78.4mm Total Displacement 1498 cm / 91.41 cu in Power 38 HP High / Low Idle Speed 3000 RPM / 800 RPM Compression Ratio...
  • Page 62: Hydraulic System Diagram (425Hd)

    Maintenance Hydraulic System Diagram (425HD) 5.15 Hydraulic System Diagram (425HD) 425D Hydraulic Schematic Low-Pressure Cooler Right Left Motor Motor Right Left Pump Pump Tank Valve Filter Cylinder Dotted lines represent high-pressure lines 425HD-MD/masterdoc101602 Maintenance...
  • Page 63 Maintenance Hydraulic System Diagram (425HD) 34” 028368 Length Part Number 40” 028369 40” 028369 40” 028369 61” 028370 61” 028370 18” 018857 56” 018777 018348 “B” 40” 018778 61” 018769 * Cut to fit 9” 018775 Maintenance 425HD-MD/masterdoc101602...
  • Page 64: Hydraulic System Diagram (425Md)

    Hydraulic System Diagram (425MD) 5.16 Hydraulic System Diagram (425MD) Length Part Number 56” 018777 56” 018777 61” 028370 18” 018857 61” 028370 56” 018777 018348 40” 018778 56” 018777 Coolers 20” 018776 9” 018775 Cut to length 5-10 425HD-MD/masterdoc101602 Maintenance...
  • Page 65: Electrical Schematic

    Oil Pressure Water P1.9 (on engine) J3.6 Water Temp J2.9 J3.9 (on engine) J3.7 Hyd. Temp Blades (optional) J3.8 Blades P4.1 Seat Start P4.5 P4.2 Headlight P4.3 Flasher Headlight Beeper P4.6 P5.1 Hazard Right P5.2 Alarm Hazard Left Maintenance 425HD-MD/masterdoc101602 5-11...
  • Page 66: Deck Belt Illustration

    Maintenance Deck Belt Illustration 5.18 Deck Belt Illustration 018052 5-12 425HD-MD/masterdoc101602 Maintenance...

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