HYDRAULICS
8B-5
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 filter
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 8M)
e. Repair (Section 8L)
f. Repair (Section 8L)
2. No traction in either direction a. Oil supply
b. Faulty charge pump
c. Faulty charge relief
d. Traction motor faulty
e. Internal damage of hydro
f. Hydro control arm loose
a. Add oil (Section 11).
Inlet strainer plugged
(Section 8M)
b. Check charge pressure
(Section 8M)
Replace (Section 8D)
c. Check charge pressure
(Section 8M)
Repair (Section 8D)
d. Isolate, repair (Section 8E)
e. Repair (Section 8L)
f. Repair (Section 2)
3. Traction in one direction only a. Internal check valve in hydro
b. Pedal/linkage out of adjust-
ment
c. Faulty crossover relief valve
a. Repair (Section 8L)
b. Adjust (Section 2C)
c. Repair (Section 8L)
4. Sluggish response to accel-
eration or deceleration
a. Air in system
b. Low charge pressure
c. Internal damage of hydro
d. Faulty crossover relief valve
a. Add oil (Section 11)
Loosen inlet line, tighten
b. Check charge pressure
(Section 8M)
Charge pump relief faulty
(Section 8L)
Internal charge pump dam-
aged, replace
c. Repair (Section 8L)
d. Repair (Section 8L)
5. No 4-wheel drive a. Rear traction motor faulty
b. Faulty rear traction motor
check valves
a. Repair (Section 8E)
b. Repair (Section 8E)
8B
To Next Page
Loading...
Need help?
General
