HYDRAULIC SUSPENSION LOCKOUT CYLINDER ASSEMBLY

TM 9-2350-238-20-1

2-11. TROUBLESHOOTING INFORMATION (CONT).

Table 2-3. UNIT TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

HYDRAULIC SUSPENSION LOCKOUT CYLINDER ASSEMBLY

HYDRAULIC SUSPENSION LOCKOUT CYLINDER ASSEMBLY DOES NOT ACTUATE.

93.

Step 1.

Check for low hydraulic pressure near pump and slip ring using pressure gage.

Start engine and set HYD PUMP/PTO CLUTCH switch ON.

If pressure gage indicates about 450 psi, go to step 7.

If pressure gage indicates less than 450 psi, go to step 2. Set HYD

PUMP/PTO CLUTCH switch OFF. Stop engine. Remove pressure

gage.

Check for open impact wrench manual shut-off valve.

Step 2.

If open, close impact wrench manual shut-off valve.

Check for damaged or faulty impact wrench manual shut-off valve.

Step 3.

Replace impact wrench manual shut-off valve. Refer to page 2-781.

Step 4.

Check for damaged or faulty impact wrench control check valve.

Replace impact wrench control check valve. Refer to page 2-781.

Step 5.

Check for damaged or faulty hull hydraulic relief valve.

Replace hull hydraulic relief valve. Refer to page 2-797.

If problem still exists, notify direct support maintenance.

Step 6.

Install pressure gage to lockout cylinder manifold test port. Start engine and

Step 7.

set HYD PUMP/PTO CLUTCH switch ON.

If pressure gage indicates a minimum of 450 psi, replace lockout

pressure reducing valve. Refer to page 2-887. Set HYD PUMP/PTO

CLUTCH switch OFF. Stop engine. Remove pressure gage.

Step 8.

Check for damaged or faulty lockout cylinder check valve.

Replace lockout cylinder check valve. Refer to page 2-887.

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