TRUCK SERVICE MANUAL
STEERING
4. Check system over for external leakage.
Leakage is usually indicated by an oilwetted
area, oil dripping or oily dirt accumulation. Since
air and fan draft have probably spread leaking
oil, clean the entire system off thoroughly, then
operate and watch for leakage. Usual points for
leaks are around fittings or along hoses which
have burst or split under stress and strain.
Leakage can cause the same troubles as a low
oil supply in the reservoir and a "lump" or hard
spot in steering. Air occasionally causes shimmy
too.
D. The third step is to check pump pressure.