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Table 4-2. Unit Troubleshooting-continued -706880193
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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 -706880195
TM 5-4210-233-14&P-1
Table 4-2 Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - Continued
14
ERRATIC OPERATION IN ALL HYDRAULIC CIRCUITS
Step 1 heck for low hydraulic oil level.
Fill to proper level (see para 3-1. ).
Step 2. Check engine RPM.
Increase engine RPM to 1250 for smooth operation.
Step 3. Check for loose hose and/or fitting allowing air to enter system.
Re-tighten or replace fittings or hose (see para 4-9).
Step 4. Check operation of pressure reducing (de-stroking) valve.
Refer to Direct Support maintenance to test or replace valve.
Step 5. Check operation of hydraulic pump.
Refer to Direct Support maintenance to repair pump.
15
OUTRIGGER JACK CYLINDER EXTENDS WHILE MACHINE IS ROADING
Step 1. 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 defective jack cylinder check valve.
Refer to Direct Support maintenance for troubleshooting.
Step 3. Check for leaking jack cylinder piston seals or intern l damage.
a
Refer to Direct Support maintenance, to replace seals.
4-65

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