Table 5-2. Direct Support Troubleshooting-continued -706880696

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

Table 5-2. Direct Support Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

HYDRAULIC SYSTEM - Continued

JACK OUTRIGGER CYLINDER EXTENDS WHILE MACHINE IS ROADING

Step 1. Defective double pilot operated check valve.

Refer to hydraulic system component testing (see para 5-50).

Step 2. Leaking piston seals or internal damage.

Replace seals (see para 5-59).

SLOW OR ERRATIC OPERATION OF OUTRIGGER EXTENSION CYLINDERS

Step 1. Scored valve spool in outrigger control valve.

Replace (see para 4-190).

Step 2. Defective extension cylinder (internal parts).

Remove extension cylinder and repair as necessary (see para 4-194 and 5-58).

Step 3. Worn or defective main hydraulic pump.

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

OUTRIGGER EXTENDS WHILE MACHINE IS ROADING

Step 1. Air in system.

Purge system by extending and retracting, lowering and raising outrigger to its full travel

limits several times.

Step 2. Leaking piston seals or internal damage.

Replace required seals (see para 4-194 and 5-58).

OUTRIGGER VERTICAL STABILIZING CYLINDER SLOW OR ERRATIC

Step 1. Air in system.

Purge system by extending and retracting, lowering and raising outrigger to its ull travel

limits several times.

Step 2. Leaking piston seals or internal damage.

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

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