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1. Hydraulic System (Continued)
Problem
Foot pedals do not operate smoothly
2. Hydrostatic Drive
Problem
No power on one side (both
directions)
No power on one side (one direction
only)
No power on both sides (also loss of
hydraulic power)
Gradual loss of power as machine
warms up
System erratic and/or noisy
Machine will not travel in a straight
line
62
4. MAINTENANCE
Cause
Foot pedal linkages out of
adjustment
Foot pedal linkages need lubrication
Cause
Reservoir low on fluid
Disconnected control linkage
Bolt sheared on pump pintle lever
High pressure line failure
Drive chain failure
Motor shaft or key failure
Excessive internal leakage in motor
and/or pump
Defective relief valve
Reservoir low on oil
Coupling failure between engine and
pump
Drive coupling between front and
rear pump failure
Check system pressure
Excessive internal leakage in pump
and/or motor
Air in system due to low oil level in
reservoir
Air in system due to leak at suction
fitting
Internal pump or motor wear caused
by overspeeding
Excessive play in linkage or pintle
lever
Control levers binding
Remedy
Adjust foot pedal linkages.
Lubricate with a silicone based
lubricant.
Remedy
Replenish with 10W30 API SJ oil.
Check for hose or fitting leak.
Reconnect and adjust linkage.
Replace. Check pintle lever for
loose bolt or excessive play.
Replace line. Ensure new line fits
without being forced. If necessary
stress relieve.
Replace chain or connection link.
Adjust tightener tension.
Inspect and repair defective parts.
Check motor mounting bolts.
Inspect and repair defective unit.
Flush all lines and tank. Replace
filter. Check on type of fluid used
and engine RPM.
Replace defective valve.
Replenish with 10W30 API SJ oil.
Check for hose or fitting leaks.
Inspect and replace damaged parts.
Check for misalignment between
engine and pumps.
Inspect couplings for sheared
splines, replace. Also check support
bearings in pumps.
If low, consult dealer.
Consult dealer.
Replenish with 10W30 API SJ oil.
Check fittings and tighten.
Consult your dealer.
Adjust linkage and tighten or replace
pintle lever.
Check that shields are not stopping
lever from full travel.
Adjust tracking.
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