Jacobsen LF 550 Technical/Repair Manual
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Jacobsen LF 550 Technical/Repair Manual

Jacobsen LF 550 Technical/Repair Manual

Lightweight fairway mowers
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See also: Parts & Maintenance Manual , Operating Manual
TM
TM
LF 550
and LF 570
Lightweight Fairway Mowers
Technical/Repair Manual
67978, 67979, 67980,
67981, 67982, 67983

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Summary of Contents for Jacobsen LF 550

  • Page 1 LF 550 and LF 570 Lightweight Fairway Mowers Technical/Repair Manual 67978, 67979, 67980, 67981, 67982, 67983...
  • Page 3 ©2012 Jacobsen, A Textron Company. All rights reserved.
  • Page 5 This manual provides detailed information and procedures to safely repair and maintain the following: WARNING Jacobsen LF 550™ and LF 570™ lightweight fairway mowers and associated accessory attachments Certain vehicle components contain or emit This manual is intended to introduce and guide the user...

  • Page 6: Safety

    Near the beginning of each chapter is a specifications listing. This listing contains any specifications contained within the chapter. Copyright 2012, Jacobsen, A Textron Company “All rights reserved, including the right to reproduce this material or portions thereof in any form.” 4241262-Rev B...
  • Page 7 Table of Contents Safety Specifications and General Information Engine Electrical Hydrostatic Power Train Hydraulics Steering Cutting Units Accessories and Miscellaneous Repair 4241262-Rev B...

  • Page 9: Table Of Contents

    Chapter 1 Safety Introduction ..............1-2 Prepare for the Job .

  • Page 10: Introduction

    SAFETY Introduction Safety Notices Safety is the most important element of any repair Throughout this manual, the following key safety words procedure. Knowledge of the procedure to be performed will be used to alert the reader of potential hazards. and safe work habits are essential to preventing death, Become familiar with these words and their meaning.
  • Page 11 SAFETY TN3585 Figure 1-1 4241262-Rev B...
  • Page 12 SAFETY 4181861 4181862 4131663 4241262-Rev B...
  • Page 13 SAFETY 4199140 41 8 1 8 64 4181863 4182520 4181865 4241262-Rev B...

  • Page 14: Inspect Safety Labels

    SAFETY Inspect Safety Labels Park Mower Safely Safety labels are critical to the safe operation of the See Figures 1-2 and 1-3. mower. Inspect the mower for any damaged, missing, or WARNING unreadable labels. Replace labels as needed before placing the mower back in service. Before cleaning, adjusting, or repairing this equipment, disengage all drives, engage park Keep Work Area Clean...

  • Page 15: Use Lifting Equipment Safely

    SAFETY Support Machine Securely NOTICE • Permanent damage to the turbocharger may WARNING occur if the engine is shut down without • Support the machine using properly rated allowing the turbocharger time to cool. jackstands. Never work under a machine •...

  • Page 16: Service Tires Safely

    SAFETY Service Tires Safely Handle Fuel Safely Handle fuel with care—it is highly flammable. WARNING WARNING An inflated tire contains explosive force. Use care when handling wheels and tires. • Never remove the fuel cap from the fuel tank, or add fuel, when the engine is running or while the engine is hot.

  • Page 17: Handle Chemical Products Safely

    SAFETY Handle Chemical Products Service Hydraulic System Safely Safely WARNING WARNING The hydraulic system is under pressure, and the oil may be hot! Exposure to chemical products could result in • Always allow the machine to cool completely serious injury. Handle chemical products with before performing service.

  • Page 18: Service Electrical Components Safely

    SAFETY Service Electrical Components Safely WARNING Always disconnect the negative terminal first and positive terminal last. Connect positive terminal first and negative terminal last. Use care when testing live circuits to prevent arcing. Arcing could result in death or serious injury. •...
  • Page 19 Chapter 2 Specifications and General Information Machine Identification ............2-2 Machine Serial Number .

  • Page 20: Machine Identification

    SPECIFICATIONS AND GENERAL INFORMATION Machine Identification Engine Serial Number See Figure 2-3. Machine Serial Number See Figures 2-1 and 2-2. TN3605 Figure 2-3 The engine serial number plate (1) is attached to the top of the rocker arm cover. The plate also includes the engine model number and the engine code number.

  • Page 21: Component Location

    SPECIFICATIONS AND GENERAL INFORMATION Component Location See Figure 2-4. CAUTION Become familiar with operator controls, machine components, and correct operating procedures before beginning repair procedures. TN3586 Left Front Wheel Throttle Lever Hydraulic Oil Tank Left Front Cutting Unit Instrument Panel Hood Center Cutting Unit Steering Wheel...

  • Page 22: Specifications

    SPECIFICATIONS AND GENERAL INFORMATION Specifications Quick Reference Specifications Engine General Engine Specifications ® Manufacturer/Models Kubota Interim Tier 4/Stage IIIA V1505-E3B ® Kubota Interim Tier 4/Stage IIIA V1505-T-E3B Engine Type 4-Stroke, Diesel Fuel Requirement No. 2-D Diesel Fuel (Cetane Rating 45) Number of Cylinders/Configuration 4, In-Line Displacement...

  • Page 23: Electrical

    SPECIFICATIONS AND GENERAL INFORMATION Electrical Test Specifications Resistance Across Solenoid Coil— 5.3 ± 10% ohms Front Mow Solenoid Coil at 68° F Resistance Across Solenoid Coil— 5.3 ± 10% ohms Front Backlap Coil at 68° F Resistance Across Solenoid Coil— 5.3 ±...

  • Page 24: Hydrostatic Power Train

    SPECIFICATIONS AND GENERAL INFORMATION Hydrostatic Power Train Test Specification Traction Pump Flow 38.3 (145) at 3150 rpm gpm (lpm) Forward System Relief Pressure— 3625 ± 10% (250 ± 10%) at 3150 rpm psi (bar) Machine Serial Numbers Ending 1651 Through 2499 Forward System Relief Pressure—...
  • Page 25 SPECIFICATIONS AND GENERAL INFORMATION Repair Specification Brake Release Valve—Check Valve Torque 20–25 (27.1–33.9) lb-ft (N·m) 4WD Valve—Ports “LRF,” “LRR,” “RRF,” and “RRR” 110 (149) lb-ft (N·m) Fitting Torque 4WD Valve—Ports “LF” and “RF” Fitting Torque 110 (149) lb-ft (N·m) 4WD Valve—DRN Port Fitting Torque 25 (34) lb-ft (N·m) 4WD Valve—REV Port Fitting Torque...

  • Page 26: Hydraulics

    SPECIFICATIONS AND GENERAL INFORMATION Hydraulics Test Specifications Front Cutting Units Pump Flow 6.8 (25.7) at 3150 rpm gpm (lpm) Rear Cutting Units Pump Flow 6.8 (25.7) at 3150 rpm gpm (lpm) Lift/Steer Pump Flow 6.8 (25.7) at 3150 rpm gpm (lpm) Hydraulic Leakage Percentage Ranges 0–10% = Good 11–20% = Marginal...

  • Page 27: Steering

    SPECIFICATIONS AND GENERAL INFORMATION Steering Test and Adjustment Specifications Rear Axle Alignment Toe-In Measurement 0.030–0.090 (0.8–2.3) in. (mm) Rear Axle Steering Arm-to-Steering Stop 0.030–0.090 (0.8–2.3) in. (mm) Measurement Rear Axle Assembly End Play 0.010–0.060 (0.25–1.5 mm) in. (mm) Repair Specifications Steering Wheel Nut 25–30 (34–41) lb-ft (N·m)
  • Page 28 SPECIFICATIONS AND GENERAL INFORMATION Cutting Units Checks and Adjustments Reel Bearing Pre-Load 0.040 (1.0) in. (mm) Bedknife Front Face Height 0.060 (1.5) in. (mm) Bedknife Front Face Angle degrees Bedknife Top Face Angle (Rear Relief) 8–10 degrees Reel Blade Relief Angle degrees Bedknife-to-Reel Gap 0.001–0.003 (0.025–0.076)
  • Page 29 SPECIFICATIONS AND GENERAL INFORMATION Accessories and Miscellaneous OPS Mounting Hardware Mounting Hardware Torque 80–90 (108–122) lb-ft (N·m) Fuel Tank Capacity 17 (64.4) gal (L) Work Light Work Light Adjustment Bolt 60–75 (6.8–8.5) lb-in. (N·m) Front Tires Size 26.5 x 14-12 Type 4-Ply Air Pressure...
  • Page 30 (kg) 67979 (LF 550, 4WD): 2960 (1343) 67981 (LF 570, 2WD): 3135 (1422) 67982 (LF 570, 4WD): 3274 (1485) 67980 (LF 550 Turbo, 4WD): 2974 (1349) 67983 (LF 570 Turbo, 4WD): 3284 (1490) Overall Cutting Width 100 (2540) in. (mm)

  • Page 31: Standard Torque Values

    SPECIFICATIONS AND GENERAL INFORMATION Standard Torque Values NOTE NOTICE Jacobsen uses Grade 5 plated bolts as standard, unless All torque values included in these charts are otherwise noted. When tightening plated bolts, use the approximate and are for reference only. Use of value given for lubricated.

  • Page 32: Hydraulic Hose, Tube, And Fitting General Instructions

    Make sure hoses are assembled to proper “A” and “B” ports on components. TN4097 Hydraulic Hose and Tube Torque Values • SAE Boss O-Ring Kit Jacobsen PN 5002452 • O-Ring Face Seal (ORS) O-Ring Kit PN 5002454 Size lb-ft N·m •...
  • Page 33 Chapter 3 Engine Specifications ..............3-2 General Engine Specifications .

  • Page 34: Specifications

    ENGINE Specifications General Engine Specifications Engine ® Manufacturer/Models Kubota Interim Tier 4/Stage IIIA V1505-E3B ® Kubota Interim Tier 4/Stage IIIA V1505-T-E3B Engine Type 4-Stroke, Diesel Fuel Requirement No. 2-D Diesel Fuel (Cetane Rating 45) Number of Cylinders/Configuration 4, In-Line Displacement 91.41 (1498) cu in.

  • Page 35: Component Location

    ENGINE Component Location Kubota V1505 See Figures 3-1 and 3-2. TN3590 Radiator/Hydraulic Oil Cooler Engine Coolant Drain Valve Thermostat Engine Oil Pressure Switch Engine Oil Fill Cap Alternator Muffler Fan Belt Exhaust Manifold Coolant Overflow Bottle Starter Motor Figure 3-1: Component Location—Right Side 4241262-Rev B...
  • Page 36 ENGINE TN3589 Air Cleaner Indicator Throttle Cable Air Cleaner Assembly Air Vent Screw Engine Coolant Filler/Pressure Cap Fuel Shutoff Solenoid Radiator/Hydraulic Oil Cooler Fuel Filter Engine Temperature Sensor Battery Air Intake Hose Insulating Sleeve Figure 3-2: Component Location—Left Side 4241262-Rev B...

  • Page 37: Checks And Adjustments

    ENGINE Checks and Adjustments WARNING Purging the Fuel System The engine may start during this process. Be careful of injury due to moving components. If the engine starts, continue purging the fuel Adjustment system. See Figures 3-3 through 3-5. CAUTION Do not purge fuel system when engine is hot.

  • Page 38: Repair

    ENGINE Repair WARNING Fan Belt The engine may start during this process. Be careful of injury due to moving components. If the engine starts, continue purging the fuel Removal and Installation system. See Figures 3-6 and 3-7. 1. Park the mower safely. (See “Park Mower Safely” on 8.

  • Page 39: Air Cleaner Assembly

    ENGINE Installation Notes • Install fan belt by reversing order of removal. • Adjust belt tension by loosening alternator mounting screws (1 and 3) and pulling alternator (2) against belt (4) until proper tension is achieved. • Measure belt tension at midpoint between pulleys. Adjust alternator belt to 0.25–0.313 in.

  • Page 40: Muffler And Exhaust Assembly

    ENGINE Installation Notes • Install air cleaner assembly by reversing order of removal. • Install dust cap with air inlet (3) located at bottom of assembly. TN3603 Figure 3-10 • Reset air filter indicator by pressing button (8) on end of indicator (9).

  • Page 41: Exhaust Manifold-Naturally Aspirated Engine

    ENGINE Exhaust Manifold and Turbocharger 6. Install insulating sleeve (5), tailpipe (6), and U-bolt (3), and install, but do not tighten, two nuts (4). Removal and Installation 7. Install two screws (7) and two lock washers (8). Tighten screws (7) to 35–40 lb-ft (47.5–54.2 N·m). See Figure 3-13.

  • Page 42: Radiator/Hydraulic Oil Cooler

    ENGINE Radiator/Hydraulic Oil Cooler Removal See Figures 3-14 through 3-19. WARNING Never remove the radiator cap when the coolant is hot. The engine must be shut down and cooled before the radiator cap is removed. Very hot coolant will be sprayed from the radiator if the cap is loosened before the engine has cooled.
  • Page 43 ENGINE TN3606 Figure 3-19 14. Remove four radiator/hydraulic cooler mounting bracket nuts (12). TN3603 15. Carefully remove radiator/hydraulic cooler from Figure 3-17 mount. NOTE NOTE Plug hoses after disconnecting to prevent loss of Dispose of fluids properly at approved local recycling hydraulic oil.

  • Page 44: Engine Oil Cooler (Turbocharger Engine Only)

    ENGINE Engine Oil Cooler Thermostat (Turbocharger Engine Only) Removal and Installation Removal and Installation See Figure 3-21. 1. Park the mower safely. (See “Park Mower Safely” on See Figure 3-20. page 1-6.) 1. Park the mower safely. (See “Park Mower Safely” on 2.

  • Page 45: Fuel Filter

    ENGINE Fuel Filter Removal and Installation See Figures 3-22 through 3-24. CAUTION Diesel fuel is highly flammable—handle with care. Use an approved container with a spout that will fit inside the fuel filler neck. Avoid using unapproved containers to transport fuel. Keep all fuel containers clean and closed when not in use.

  • Page 46: Fuel Pump

    ENGINE Fuel Pump Removal and Installation See Figures 3-25 through 3-27. CAUTION Diesel fuel is highly flammable—handle with care. Use an approved container with a spout that will fit inside the fuel filler neck. Avoid using unapproved containers to transport fuel. Keep all fuel containers clean and closed when not in use.

  • Page 47: Engine

    ENGINE Engine Removal and Installation See Figures 3-28 through 3-36. NOTE Naturally aspirated engine shown; turbocharged engine is similar. 1. Park the mower safely. (See “Park Mower Safely” on page 1-6.) 2. Allow engine to cool completely. 3. Disconnect battery negative (–) cable at battery. 4.
  • Page 48 ENGINE TN3616 Figure 3-31 TN3627 Figure 3-33 14. Unscrew hose clamp (10). 15. Disconnect fuel return line (9). 20. Remove nut (18) and disconnect engine temperature sensor wire (19). 16. Remove nut (12). Disconnect glow plug wire (11). TN3615 TN3626 Figure 3-34 Figure 3-32 21.
  • Page 49 ENGINE WARNING Prevent personal injury. Use a properly rated lifting device. Always be sure the load is balanced before lifting. TN3617 Figure 3-35 23. Unlatch wire harness clamps (24). 24. Remove bolt (25). TN3633 Figure 3-36 25. Using an engine hoist, support engine (26) and remove three engine mounting bolts (27).

  • Page 50: Engine Service

    • Install engine by reversing order of removal. • If necessary, remove components from engine and install components on new engine. • Apply dielectric grease (Jacobsen PN 365422) to any wire connectors disconnected. • Use new exhaust gasket when installing exhaust system.

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Lf 570

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