JLG 26MRT Service & Maintenance page 50

SECTION 3 - TROUBLESHOOTING
TROUBLE
Machine hard to steer or steering is erratic (cont.)
Steering inoperative
Machine will not steer left or right
Machine wanders; steering not firm
3-6
Table 3-2. Chassis Troubleshooting
PROBABLE CAUSE
Lack of lubrication on steer components. Lubricate steer components in accor-
Restricted crossover relief valve.
Steer system pressure low.
Bent steering linkage.
Hydraulic pump not functioning properly. Repair or replace valve.
Steer cylinder not functioning properly.
Steer switch on controller not functioning
properly.
Hydraulic system pressure too low.
Loose or damaged wiring on control
switch or solenoid valve.
Solenoid valve not functioning properly.
Restricted or broken hydraulic line on
valve bank or hydraulic pump.
Relief valve improperly set or not function-
ing properly.
Steer cylinder not functioning properly.
Steer switch on controller not functioning
properly.
Wiring on steer control switch is dam-
aged.
Wiring on solenoid valve damaged.
Coil in solenoid damaged.
Bent cylinder rod.
Damaged steer linkage.
Crossover relief valve set too low or not
functioning properly.
Steer linkage loose.
Spindle bushings badly worn.
– JLG Sizzor –
REMEDY
dance with Lubrication Chart.
Clean or replace valve.
Adjust pressure.
Repair or replace linkage as required.
Repair or replace cylinder.
Repair or replace switch.
Adjust pressure.
Ensure proper connection of wires at con-
trol switch or solenoid valve. Using suit-
able test meter, perform continuity test on
wires. Repair or replace wires as neces-
sary.
Repair or replace valve.
Clean, repair or replace line.
Reset, repair or replace valve as neces-
sary.
Repair or replace cylinder.
Replace controller.
Repair or replace wiring.
Repair or replace wiring.
Replace coil.
Repair or replace cylinder.
Repair or replace steer linkage.
Reset, repair or replace valve as neces-
sary.
Tighten linkage.
Replace bushings.
3120791