TRUCK SERVICE MANUAL
Check oil level. An overfilled pump reservoir can be a
cause for leakage. The oil in the steering system
expands as heated during normal usage. If overfilled
the excess is forced through the reservoir cap vent.
Operate the engine and steering system until normal
operating temperature is obtained. Remove the
reservoir cap and check level. Adjust the oil level as
If leakage persists with the oil level correct and the cap tight,
replace the cap.
Air in the system can also cause the fluid level to rise,
especially after system repair. Bleed the system as described
in the MAINTENANCE section of this chapter.
If leakage persists upon tightening the fitting nut to
Loosen the nut and rotate tubing to reseat with
brass connector. Tighten nut again and recheck. If
leakage still persists, proceed to 3b.
Remove the hose and check the sealing .face for
cracks. If a cracked flare is found, replace the hose.
If no cracks are observed, proceed to 3c.
Replace the brass connector and reface the tube
flare. Also, check the threads in the pump housing
and on the fitting nut. If nut threads are damaged,
replace the nut. If pump housing threads are
damaged, replace both the housing and the nut. If
either the return hose or the pressure hose leaks,
other than at the nut connections, replace the hose.
Tighten fitting to specified torque. If leakage persists,
replace both "O" ring seals.
Replace reservoir "O" ring.
Replace drive shaft seal after inspecting and thoroughly
cleaning the sealing surface. Replace drive shaft if
severe pitting is found. If the corrosion in the lip seal
contact zone is slight, clean the surface of the shaft
with crocus cloth first. Always replace the seal if the
shaft is replaced.
EXTERNAL LEAKAGE 235 SERIES PUMP
Fig. 9 Suspected Leakage Areas
CTS-2296R Chapter 1, Page 12
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