HYDRAULIC SUSPENSION LOCKOUT SYSTEM WILL NOT ENGAGE (HMMH).

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

SUSPENSION (CONT)

96.

HYDRAULIC SUSPENSION LOCKOUT SYSTEM WILL NOT ENGAGE (HMMH).

Step 1.

Check for low oil level in hydraulic suspension lockout system.

If oil level is low, add oil (TM 5-2420-224-10).

If oil level is not low, go to step 2.

Step 2.

Check for oil leaks and damaged lines in hydraulic suspension lockout system.

If there are oil leaks or damaged lines in hydraulic suspension

lockout system, tighten loose connections or replace lines

(pages 4-650, 4-652).

If there are no oil leaks or damaged lines in hydraulic suspension

lockout system, perform Malfunction 72 or Malfunction 73.

97.

ONE SIDE OF HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH).

Check for oil leaks and damaged lines in hydraulic suspension lockout system.

If there are no oil leaks or damaged lines in hydraulic

suspension lockout system, tighten loose connections or replace

lines (pages 4-650, 4-652).

If there are oil leaks or damaged lines in hydraulic suspension

lockout system, replace front shock absorbers (page 4-369).

HYDRAULIC SYSTEM

98.

HYDRAULIC PUMP NOISY.

NOTE

Steps 1 thru 3 are the same for both front and rear hydraulic pumps.

Step 1.

Check for loose mounting capscrews on hydraulic pump.

If mounting capscrews are loose, tighten capscrews.

If mounting capscrews are tight, go to step 2.

Step 2.

Check for low oil level in hydraulic tank.

If oil level is low, add oil (TM 5-2420-224-10).

If oil level is not low, go to step 3.

Change 2