Table 2-21. Crane Troubleshooting
TEST OR INSPECTION
Complete crane schematics can be found at the back of this manual.
CRANE ELECTRIC- FRS
1. CRANE INOPERATIVE.
Unless advised otherwise, the FRS 24V MASTER switch and the crane MAIN
POWER switch must be in the ON position for all voltage checks.
Before performing crane troubleshooting procedures, make sure the FRS 24 VDC
electrical system is functioning properly.
Attempt to move outrigger jack cylinders using crane controls on outrigger control
If outrigger/beams jack cylinders begin to move, problem is with the crane
electrical system. Refer to Test 5.
If outrigger beams/jack cylinders do not move, go to Test 2.
Return Manual Override switch to NORMAL position and install manual override
guard after Test 2. Notify Supervisor.
Cut and remove safety lock seal. Remove two screws, lockwashers, washers and
manual override guard from crane. Turn and pullout Hydraulic Pressure Manual
Override button and attempt to move outrigger jack cylinders, using crane controls
on outrigger control valve bank.
If outrigger jack cylinders begin to move, the problem is with the crane electrical
system, go to Test 5.
If the outrigger beams/jack cylinders do not move, the problem is with the hydraulic
system, go to Test 3.