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TM 5-4210-233-14&P-1
Table 5-2. Direct Support Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - Continued
11
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).
12
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).
13
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).
14
OUTRIGGER VERTICAL STABILIZING CYLINDER SLOW OR ERRATIC
Step 1. Air in system.
Purge system by extending and retracting, lowering and raising outrigger to its f
ull travel
limits several times.
Step 2. Leaking piston seals or internal damage.
Replace seals (see para 4-195 and 5-59).
5-26
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