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Table 4-2. Unit Troubleshooting-continued -706880194
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TM-5-4210-233-14-P-1 Firfighting Truck 100 Ft. Aerial Ladder 1000 GPM Manual
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Table 4-2. Unit Troubleshooting-continued -706880196
TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - Continued
16
SLOW OR ERRATIC OPERATION OF OUTRIGGER EXTENSION CYLINDERS
Step 1. Check for air in system.
Purge system by extending and retracting, raising and lowering the outrigger to its full travel
limits several times.
Step 2. Check for low hydraulic oil.
Fill oil to proper level (see para 3-1).
Step 3. Check for malfunctioning outrigger control valve.
Refer to Direct Support maintenance to replace control valve.
Step 4. Check for defective outrigger extension cylinder (internal parts).
Refer to Direct Support maintenance to repair outrigger extension cylinder.
Step 5. Check for defective main hydraulic pump.
Refer to Direct Support maintenance to repair pump.
17
OUTRIGGER EXTENDS WHILE MACHINE IS ROADING
Step 1. Check for air in extension cylinder.
Purge system by extending and retracting, raising and lowering the outrigger several times
to its full travel limits.
Step 2. Check for leaking piston seals or internal damage in outrigger extension cylinders.
Refer to Direct Support maintenance to replace seals.
4-66

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