1
5
4
3
2
TM 9-4940-568-10
3-40
Table 3-1. Troubleshooting - CONT.
Malfunction
Test or Inspection
Corrective Action
CRANE (CONT)
8.
SWING OPERATION SLOW OR JERKY IN ONE OR BOTH DIRECTIONS, OR DOES
NOT SWING IN EITHER DIRECTION.
Step 1. Check if FRS (1) is level (Refer to level gages (2) on crane (3), level bubble should be
in green area on both gages.)
NOTE
On the FRS, the crane must be in the stowed position when checking hydraulic oil level.
Hydraulic oil must be at operating temperature.
Step 2. Check the hydraulic oil level in sight glass (4) on hydraulic reservoir (5). Oil level should
be between add and full marks.
If oil level is low, add oil (Appendix G).
If oil level is OK, go to Step 3.
Step 3. Check for loose or leaking hydraulic connections and damaged hydraulic tubes or hoses.
Tighten loose connections. If leak does not stop, notify Unit Maintenance.
If tubes or hoses are damaged or other problems are evident, notify Unit Maintenance.
