Table 5-2. Direct Support Troubleshooting-continued -706880697

TM 5-4210-233-14&P-1

Table 5-2. Direct Support Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

HYDRAULIC SYSTEM - Continued

OUTRIGGER VERTICAL STABILIZING CYLINDER SLOW OR ERRATIC - Continued

Step 3. Binding outrigger housing.

Repair or replace outrigger housing.

Step 4. Worn or defective main hydraulic pump.

Repair or replace pump (see para 5-61 or 6-75).

VERTICAL OUTRIGGER CYLINDER RETRACTS UNDER LOAD

Step 1. Defective double pilot operated check valve.

Replace pilot check valve (see para 4-195).

Step 2. Leaking piston seals or internal damage.

Replace piston seals (see para 4-195 and 5-59).

EXCESSIVE PRESSURE BUILD-UP

Defective pump pressure compensating valve.

Clean, repair, or replace as necessary (see para 6-75).

PUMP NOISE (ACCOMPANIED BY OIL FOAMING IN RESERVOIR)

Air entering at suction manifold.

Check all lines for security, manifold for cracks and proper attachment. Tighten, repair, or

replace components as necessary.

5-27