TROUBLE SHOOTING GUIDE
This chart is designed to provide a quick diagnosis of the malfunction and the corrective action to be taken. Its use will shorten maintenance time appreciably.
Malfunction
Probable Cause
Hot to Determine
Corrective Action
Page
Steps
1. Loss of Oil
Fittings
Check for loose hose fittings
Tighten fittings
Inspect for external
leakage under load
Hose or Tubing
Check for cracked or worn spots
Replace hose or tubing
in hose or tubing
Gaskets
Check motor shaft seal retainer
Replace gasket as necessary
13
gasket
Check gasket between pump hous-
Replace gasket as necessary
ing and control assembly
Check gasket between control hous-
If leakage is noted, replace gasket 106
6
ing and control arm assembly
and control seal
Seals
Remove motor shaft seal assembly
Replace seal as necessary
12 & 13
and check seal
Remove pump shaft seal assembly
Replace seal as necessary and
18
and check seal
gasket
Remove control seal plate and
Replace seal as necessary
6
check seal
O-Rings
O-Rings on high pressure
Remove plug and check O-Ring
Replace O-Ring
3
plugs (motor)
(2 Plugs)
O-Ring on shuttle valve plugs
Remove plug and check O-ring
Replace O-Ring
2
(motor)
(2 Plugs)
O-Ring on low pressure relief
Remove low pressure relief valve
Replace O-Ring
valve plug (motor)
assembly and check O-Ring
Square-Ring on shaft seal
Remove seal retainer and inspect
Replace Square-Ring
18
retainer assembly
for cuts or abrasions
2. Loss of Control
Low Oil Level
Check reservoir
Replenish to proper level
Plugged Oil Filter
Remove filter housing and
Replace filter element
check filter
85
