Table 3-1. Troubleshooting - CONT.
Test or Inspection
MATERIAL HANDLING CRANE (MHC) (CONT).
SWING OPERATION SLOW, JERKY IN ONE OR BOTH
DIRECTIONS OR WILL NOT SWING IN EITHER DIRECTION.
Step 1. Check that outrigger jacks are firmly deployed. If not, lower
outrigger jacks until front suspension is unloaded.
Step 2. Check if truck is level (Para 2-30a).
Step 3. Check fluid level in main hydraulic reservoir.
If fluid level is low, notify Unit Maintenance.
If fluid level is OK and problem persists, notify Unit
HOIST DOES NOT SPOOL CABLE PROPERLY.
Step 1. As soon as a mis-spooled condition is observed, immediately
lower any load to the ground.
Step 2. Elevate the boom to the maximum angle, telescope out to maximum
length, and lower the hook to just above ground level (approximately
five wraps of cable remaining on the drum).
Step 3. Observe the entire length of hoist cable, and note any obvious kinks.
If kinks are noted, position the crane as necessary to permit access
to the kinked areas and refer to Para 2-11 and examine cable for
If the cable is still serviceable, return the crane to the position
described in Step 2.