TM 9--2350--292--10
0091 00--1
HYDRAULICS SYSTEM TROUBLESHOOTING
0091 00
THIS WORK PACKAGE COVERS:
Hoist winch fails to operate or develop full power
0091 00--1
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Hydraulic oil constantly overheats
0091 00--1
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Insufficient or no auxiliary oil pressure
0091 00--1
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Insufficient main hydraulics system pressure
0091 00--1
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Main winch fails to operate or fails to develop full power
0091 00--2
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Winch operates on auxiliary hydraulic power, but does not operate on main engine hydraulic power
0091 00--2
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INITIAL SETUP:
Personnel Required
Three
References
WP 0045 00
WP 0101 00
WP 0036 00
HOIST WINCH FAILS TO OPERATE OR DEVELOP FULL POWER
Step 1. Check oil level in hydraulic reservoir.
Fill as specified in WP 0101 00.
Step 2. Attempt to operate with PTO clutch manually engaged (WP 0045 00).
Step 3. If problem still exists, notify unit maintenance (HOIST WINCH FAILS TO OPERATE OR DEVELOP
FULL POWER).
HYDRAULIC OIL CONSTANTLY OVERHEATS
Step 1. Check OIL TEMP GAGE for high temperature indication.
If gauge indicates high temperature (above 225°F (107°C)), ensure PTO CLUTCH switch is ON. Stop any
operations using the hydraulics system. Run the engine at 2000 RPM to circulate oil through the hydraulic
oil cooler until oil cools and indicator goes off.
Step 2. If problem still exists, notify unit maintenance (HYDRAULIC OIL CONSTANTLY OVERHEATS).
INSUFFICIENT OR NO AUXILIARY OIL PRESSURE
Step 1. Check and ensure system selector lever is in auxiliary position.
Place system selector lever in auxiliary position.
Step 2. Check oil level in hydraulic reservoir (WP 0101 00).
Fill as specified in WP 0101 00.
Step 3. If problem still exists, notify unit maintenance (INSUFFICIENT OR NO AUXILIARY OIL PRESSURE).
INSUFFICIENT MAIN HYDRAULICS SYSTEM PRESSURE
Step 1. Remove subfloor plates above hydraulic lines and components (WP 0036 00).
Step 2. Inspect lines and components for leaks.
Step 3. Tighten fittings and connections.
Step 4. Attempt to operate with PTO clutch manually engaged (WP 0045 00).
Step 5. If problem still exists, notify unit maintenance (INSUFFICIENT MAIN HYDRAULICS SYSTEM
PRESSURE).