8-8
Final drive trans-
mission noisy
No lubricating oil
Parking brake
damaged or out of
adjustment
Axles have too
much end play
Chain loose
Check and bring oil to
the proper level. Use
10W30 API SJ oil
Inspect and adjust or
replace damaged parts
Pre-load axle bearings
removing all end play
Replace the chain
8.2B Final Drive Transmission
Brake will not
hold machine
Brake will not
release machine
Brake valve will
not release pres-
sure
Brake parts dam-
aged or worn
Brakes are disen-
gaged
No power to brake
valve solenoid
No pressure in
supply line to
brake valve
Brakes are
engaged
Verify position of over-
ride
Consult your Dealer or
Thomas Service Dept.
Engage parking brake
Check fuse, If fine, con-
sult Dealer or Thomas
Service Dept.
Consult your Dealer or
Thomas service Dept.
Release brake
8.2C Park Brake
Symptom Cause Remedy
Symptom Cause Remedy
8. 2A Hydrostatic Drive 8.2A Hydrostatic Drive
Symptom Cause Remedy
No power on Reservoir low Replenish with
one side (both on oil 10W30 API
directions) SJ oil.
Check for hose or
fitting leak.
Disconnected Reconnect and adjust
control linkage linkage.
Groove pin Replace. Check
sheared on pintle lever for loose
pump pintle bolt or
lever excessive play.
High pressure Replace line. Ensure
line failure new line fits without
being forced. If
necessary stress
relieve.
Drive chain Replace chain or
failure connection link.
Adjusttightener
tension.
Motor shaft Inspect and repair
failure defective parts.
Check motor
mounting bolts.
Excessive Inspect and repair
internal defective unit. Flush
leakage in pump all lines and tank.
and/or motor Replace filter.
Check on type
of fluid used and
engine RPM.
No power on Defective relief Replace defective
one side (one valve valve.
direction only)
Damaged ball Disassemble and
check repair.
No power on Reservoir low Replenish with
both sides on oil 10W30 API SJ
(also loss of Check for hose or
hydraulic fitting leaks
power)
Universal Joint Inspect and repair
failure between damaged parts Flush
engine and pump all lines and tank,
change filter. Check
on type of fluid used
and engine RPM
Damaged Disassemble and
ball check repair
Gradual loss Excessive Consult dealer or
of power as internal Thomas Service
machine leakage in Dept.
warms up pump and/or
motor
Symptom Cause Remedy
System erratic Air in system due Replenish with
and/or noisy to low oil level in 10W30 API SJ
reservoir oil.
Air in system due Check fittings
to leak at and tighten.
suction fitting
Internal pump or Consult your dealer
motor wear or Thomas Service
caused by Dept.
overspeeding
Excessive play in Adjust linkage and
linkage or pintle tighten or replace
lever pintle lever.
Machine will Control levers Check that shields
not travel in a binding are not stopping
straight line in lever from full travel.
high range
Check for linkage
binding at spring
mount. Adjust
tracking.
TROUBLESHOOTING 8.2
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