Thomas 85 - User Manual

Other manuals for Thomas 85

Repair Manual216 pages

Questions and Answers

L
Louis GarciaAug 17, 2025
Why Thomas Compact Loader engine will not crank over?
- K
  Kelli DelacruzAug 18, 2025
  The engine of your Thomas Compact Loader might not crank over due to several reasons. It could be a battery failure, in which case you should check, charge, or replace the battery. Alternatively, there might be a battery cable failure; inspect for loose or corroded connectors, tighten and clean them, and use di-electric grease to prevent future corrosion. Other potential causes include starter failure (repair or replace), a burnt fuse (check and replace), a defective relay (check relay continuity and replace if needed), or an ignition switch failure (check continuity, repair, or replace).
B
bwuAug 20, 2025
What to do if Thomas 85 has no power on one side?
- E
  elizabethbrooksAug 20, 2025
  If your Thomas Compact Loader is experiencing a loss of power on one side, consider these potential causes: the reservoir might be low on oil, so replenish it with 10W30 API SE/CD oil and check for hose or fitting leaks. A disconnected control linkage could also be the issue; reconnect and adjust the linkage. Other possible causes include a groove pin sheared on the pump pintle lever (replace and check the pintle lever for loose bolts or excessive play), a high-pressure line failure (replace the line, ensuring it fits without being forced), a drive chain failure (replace the chain or connection link), a motor shaft or key failure (inspect and repair defective parts, and check motor mounting bolts), or a charge pressure failure (replace parts as necessary).
T
Troy SmithAug 22, 2025
What to do if Thomas 85 engine cranks but won't start?
- X
  xjonesAug 22, 2025
  If the engine of your Thomas Compact Loader cranks over but doesn't start, the auxiliary hydraulics might be engaged; disengage them. A defective glow plug relay could also be the problem; check its continuity and replace it if defective. Look for a broken connection or defective wire by disconnecting the ROPS harness from the engine harness and checking the continuity of the malfunctioning circuit in both harnesses. Finally, ensure there is fuel in the loader.
O
Olivia HernandezAug 25, 2025
Why Thomas Compact Loader loses power on both sides after running?
- B
  Beverly WilliamsAug 26, 2025
  If your Thomas Compact Loader initially loses power on one side and then on both sides after a few minutes of running, it could be due to excessive internal leakage in the pump and/or motor. Inspect and repair the defective unit, flush all lines and the tank, replace the filter, and check the type of filter used and the engine RPM. Another possible cause is a defective relief valve; replace it if necessary.
J
Jason TannerAug 27, 2025
What causes loss of hydraulic power in Thomas Compact Loader?
- J
  James ZhangAug 28, 2025
  A loss of hydraulic power, indicated by no flow from the gear pump, in your Thomas Compact Loader could be due to several reasons. The reservoir might be low on oil; replenish it with 10W30 API SE/CD oil and check for hose or fitting leaks. A failure in the universal joint between the engine and pump could also be the cause; inspect and replace any damaged parts, and check for misalignment between the engine and pumps. Additionally, check for a spline coupling failure between the front and rear hydrostatic pump, inspecting the coupling for sheared splines and checking the pump shaft bearings. Finally, the hydraulic gear pump itself might not be functioning; inspect and repair it.
D
David MaxwellAug 30, 2025
How to fix jerky hydraulic action in Thomas 85 Compact Loader?
- J
  Joseph JosephAug 30, 2025
  If your Thomas Compact Loader experiences jerky hydraulic action, the reservoir may be low on oil; replenish it with 10W30 API SE/CD oil. Another possible cause is air in the hydraulic system; check for leaks between the reservoir and pump and bleed the system by extending and retracting the lift cylinders several times. Additionally, the anti-cavitation check valve might not be functioning correctly; inspect, repair, or replace it.
O
orozcomiguelSep 1, 2025
Why Thomas 85 Compact Loader boom raises slowly?
- D
  Daniel PowersSep 1, 2025
  If the boom of your Thomas Compact Loader raises slowly at full engine RPM, it could be due to a faulty pressure relief valve in the control valve; check the pressure flow and repair or replace the pump as necessary. Internal leakage in the pump due to wear is another possibility; check the pump flow and repair or replace the pump as needed. Additionally, oil might be bypassing one or both lift cylinder piston seals; install new piston seal kits.
S
stevensimonSep 4, 2025
What to do if Thomas 85 brake will not hold?
- Y
  ystevensSep 4, 2025
  If the brake on your Thomas Compact Loader will not hold the machine, there might be slack in the cables, requiring adjustment using the tightening nuts. Inspect cable mounts or ends for looseness or disconnection, and tighten or reconnect as needed. Also, check for kinked or broken cables, and replace them if necessary. Finally, the brake itself could be damaged or worn; inspect, replace, clean, or adjust as required.
C
Casey WilsonSep 6, 2025
What to do if foot controls will not release on Thomas 85?
- C
  costajamesSep 7, 2025
  If the foot controls on your Thomas Compact Loader will not release, it could be due to electro solenoids not releasing the valve spools. This might be caused by a defective solenoid or binding solenoid lock; loosen the screws and readjust. Another possible cause is a broken or poor contact from the relay to the solenoid on the valve, which also indicates a defective solenoid or binding solenoid lock; loosen the screws and readjust.
A
Amy SteeleSep 9, 2025
Why Thomas 85 Compact Loader brake will not release?
- D
  Donna BakerSep 9, 2025
  If the brake on your Thomas Compact Loader will not release, the cables might be kinked or binding; inspect and replace any worn or damaged parts. A broken, worn, or disconnected spring could also be the cause; inspect, reconnect, or replace as required. Additionally, a stuck pin could be the issue; try moving the machine slightly forward or backward slowly.

Summary

FOREWORD

SAFETY PRECAUTIONS

THE LOADER

Safety precautions related to the loader itself.

OPERATING THE LOADER

Safety measures to follow while operating the loader.

Start Safely

Specific safety guidelines for starting the loader.

Park Safely

Procedures for safely parking the loader.

CONTROLS

INSTRUMENT PANEL

Description of dashboard indicators and gauges.

SEAT AND SEAT BELT

Information on seat adjustment and seat belt usage.

SEAT BAR

Details on the seat bar's function and safety interlock.

PARKING BRAKE

Explanation of parking brake engagement and release.

THROTTLE CONTROL

Operation of the engine throttle control.

STEERING CONTROLS

Using steering levers for direction and speed.

HAND CONTROLS

Operation of optional hand controls.

AUXILIARY HYDRAULICS

Controls for auxiliary hydraulic functions.

FOOT PEDALS

Functions of foot pedals for hydraulics.

QUICK - TACH

Operation of the quick-tach system.

BOOM SUPPORT

Using boom support pins for safety.

OPERATION

Starting Instructions

Procedures for safely starting the loader.

Operating Procedure

General guidelines for operating the loader.

Filling From a Pile

Technique for loading material from a pile.

Digging With a Bucket

Method for digging and loading material.

Leveling and Backfilling

Spreading material and leveling ground.

Auxiliary Hydraulics

Operation of attachments using auxiliary hydraulics.

Lifting

Procedures for lifting the loader.

Towing

Instructions for towing or winching the loader.

Securing

Methods for securing the loader for transport.

Battery Maintenance and Boosting

Procedures for battery care and jump-starting.

Lowering Lift Arms (ENGINE OFF)

Manual procedure to lower lift arms.

MAINTENANCE

Preventative Maintenance Service Schedule

Schedule of recommended maintenance tasks by hours.

Service Access

Locations for accessing components for service.

Daily Service Checks

Routine checks of fluids, tires, safety equipment, and decals.

50 Hour Service Check

Specific maintenance tasks for the 50-hour service interval.

Final Drive Maintenance

Maintenance procedures for the final drive.

Hydraulic;Hydrostatic System Maintenance

Maintenance of hydraulic and hydrostatic systems.

Engine Maintenance

Procedures for servicing the engine.

Air Cleaner Maintenance

Steps for cleaning or replacing the air cleaner.

Electrical System

Information on the electrical system.

Tire Maintenance

Procedures for tire inflation, service, and rotation.

Troubleshooting

Common problems and solutions for electrical and hydrostatic systems.

Hydraulic System

Troubleshooting hydraulic system issues.

Final Drive Transmission

Troubleshooting final drive problems.

Special Tools

List of special tools required for maintenance.

SPECIFICATIONS

Loader Specifications

Technical details and dimensions of the loader.

Torque Specifications

Recommended torque values for fasteners.

Sound Power Level Specification

Noise level specifications for the loader.

Decals

Identification and location of safety and operational decals.

ATTACHMENTS AND BUCKETS

Thomas Approved Buckets

List of approved bucket types and their capacities.

Thomas Approved Forks and Grapples

Approved fork and grapple attachments.

Thomas Approved Attachments

List of other approved attachments for the loader.

Thomas 85 Specifications

General

Brand	Thomas
Model	85
Category	Compact Loader
Language	English

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