SM04-01 9-0
Page 3
DESCRIPTION
The steering pump is a direct drive, gear type pump. The pump provides a priority flow at a fixed rate.
MAINTENANCE
TROUBLESHOOTING.
SYMPTOM
PROBABLE CAUSE
SOLUTION
1.
Noisy pump.
a.
Low oil supply.
a.
Fill reservoir.
b. Oil too heavy.
b.
Change to proper viscosity.
c. Air leak in inlet line.
c.
Check plumbing.
d. Partly blocked inlet line.
d. Check for foreign object and/or
clean lines.
2. Foaming oil.
a. Pump cavitation.
a. Refer to Symptom 1.
b. Water in the oil.
b. Check reservoir.
3.
Pump or oil overheating.
a. Oil supply too thin.
a. Drain,and fill with proper viscos-
ity oil.
b. Oil supply contaminated.
b. Drain, clean filter, and fill with
clean oil.
c.
Pump cavitating.
c. Refer to Symptom 1.
d. Pump drive shaft excessively
d. Check alignment.
misaligned with pump driven shaft.
e. Pump drive shaft axially loaded by
e. Check for clearance at ends of
driving shaft.
shafts, for shaft misalignment or worn
driving splines.
f.
System relief valve bypassing.
f. Check relief valve setting. Refer
to Solution 4c.
4. Low flow.
a.
Pump cavitating.
a. Refer to Symptom 1.
b.
Foaming oil.
b. Refer to Symptom 2.
