HYDRAULICS
8B-3
SECTION 8B. FAILURE ANALYSIS
GENERAL
The following table lists common problems, probable
causes, and suggested remedies with section refer-
ences to detailed descriptions of remedial procedures.
PROBLEM PROBABLE CAUSE REMEDY
1. System noisy a. Oil cold
b. Air in system
c. Clogged inlet strainer
d. Charge pump internal failure
e. Pump or motor internal failure
f. Faulty crossover relief
a. Let oil warm up
b. Add oil (Section 11), loosen
inlet connection, tighten
c. Clean strainer
d. Check charge pressure
(Section 8O)
e. Repair
f. Repair (Section 8O)
2. No traction in either direction a. Oil supply
b. Faulty charge pump
c. Faulty charge relief
d. Tow valve open
e. Traction motor faulty
f. Faulty crossover relief valve
g. Internal damage of hydro
h. Hydro control arm loose
a. Add oil (Section 11) Inlet
strainer plugged (Section 8O)
b. Check charge pressure.
(Section 8O). Replace
Section 8D)
c. Check charge pressure
(Section 8O)
Repair (Section 8D)
d. Close tow valve
e. Isolate, repair (Section 8E
and Section 8F)
f. Repair (Section 8D)
g. Repair (Section 8D)
h. Repair (Section 2)
3. Traction in one direction only a. Internal check valve in hydro
b. Pedal/linkage out of adjust-
ment
a. Repair (Section 8D)
b. Adjust (Section 2C)
8B
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