Page 117
45-J Desel - Servce & Parts Manual
January 2022
Secton 19 - Troubleshootng
Problem
Possible Cause
Remedy/Solution
Steer
No steer in either direction
Joystick rocker switch inoperative
Check continuity through micro-switch inside joystick handle using wires
outside the handle. Check output (see EZ-Cal 2C2, P10-7 and P7-8).
Steering valve 5 inoperative
Check steering valve for power. Check for damage and contamination.
Check output from GP400 (see EZ-Cal ID # 2E1 P5-2 and P5-3). Inspect/
replace steering valve.
Hoses connected incorrectly
See Section 10 - Hydraulic System for correct connection.
Steer cross-port relief valve(s) 3-1
and 3-2 set too low
Set steer relief valves to 1500 PSI (103 bar). See hydraulic diagram for
relief valves location.
System interlock
Check EZ-Cal HELP messages for interlock
Steer in one direction only
Joystick rocker switch inoperative
Check continuity through micro-switch inside joystick handle using wires
outside the handle. Check output (see EZ-Cal 2C2, P10-7 and P7-8).
Steering valve 5 inoperative
Check steering valve for power. Check for damage and contamination.
Check output from GP400 (see EZ-Cal ID # 2E1 P5-2 and P5-3). Inspect/
replace steering valve.
No power to steering coil
Check for power and ground in both directions. Repair wiring. Check
output from GP400 (see EZ-Cal I.D. #s 2F-11 right & 2F-12 left).
System interlock
Check EZ-Cal HELP messages for interlock
Will steer but not fully or
slow steering
One or both steering cylinder
internal seal failure
Check/replace steering cylinder seals.
Steer cross-port relief valve(s) 3-1
and 3-2 set too low
Set steer relief valves to 1500 PSI (103 bar). See hydraulic diagram for
relief valves location.
King pin/s seizing in the bore
Disassemble and inspect. Replace bushings.
