INNER BOOM LIFT CYLINDER DRIFTS. cont'd -680640445

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

CRANE (HMMH) (CONT)

Step 2. Check inner boom lift cylinder holding valves as follows:

a. Start engine. Set auxiliary throttle switch (9) to CRANE.

b. Lift load. Allow control lever to go to neutral.

c. Set auxiliary throttle switch (9) to IDLE. Stop engine.

d. Move control lever to attempt to lower load to floor.

If load lowers any amount, replace inner boom lift cylinder

(page 4-692).

If load does not lower, notify direct support maintenance.

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