OIL FORCED OUT OF RESERVOIR
CAUSE REMEDY
Clogged oil filter Change oil and oil filter. Increase change
intervals
Air in system Bleed air from system. Check for air leak on
suction side of supply pump
Faulty supply pump (Cavitation) Check supply pump following “Hydraulic
Supply- Diagnosis”. Repair pump per pump
service instruction
Relief plungers of steering gear not adjusted
properly
Adjust relief plungers (see final adjustments
LUBRICATING OIL DISCOLORED OR SMELLS BAD
CAUSE REMEDY
Operating temperatures too high Check and correct cause of overheating
Change intervals too long Increase oil change frequency
Incorrect lubricant used Drain, flush and refill with 10W-40 motor oil
OIL IN RESERVOIR - FOAMING
CAUSE REMEDY
Air leak in suction side of supply pump Refer to pump servicing instructions
Pump cavitating Check for restriction in pump supply
Oil overheating See high operating temperatures
Incorrect lubricant Change to 10W-40 motor oil
EXCESSIVE PUMP PRESSURE WITH STEERING GEAR IN NEUTRAL POSITION
CAUSE REMEDY
Pinched oil return line. High back pressure Relocate line
Binding steering column Repair steering column
Damaged actuating shaft bearing Replace damaged parts as required
WHEEL CUTS RESTRICTED
CAUSE REMEDY
Relief plungers misadjusted Adjust relief plungers (see final adjustments)
T300-1_T500-1_T780
Troubleshooting
392 P/N 12261-683
REVISED: January 2015
To Next Page
Loading...
