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TM 5-4210-233-14&P-1
Table 4-2. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - Continued
21
FOAMING HYDRAULIC OIL
Step 1. Check hydraulic oil level.
Fill system to proper level (see para 3-1).
Step 2. Check for broken or loose supply line.
Tighten or replace line (see para 4-9).
Step 3. Check for water in hydraulic system as indicated by white or milky hydraulic oil.
Drain, flush, and refill system (see para 3-1).
Step 4. Check for Incorrect type of oil in system.
Drain and refill system (see para 3-1).
22
CLOUDY HYDRAULIC OIL
Excessive moisture in system.
Drain, flush, and refill system (see para 3-1).
23
OVERHEATING HYDRAULIC OIL
Step 1. Check hydraulic oil level.
Fill system to proper level (see para 3-1).
Step 2. Check for contaminated hydraulic oil.
Determine/correct cause of contamination; drain, flush and refill system (see para 3-1).
Step 3. Check for defective pressure reducing (de-stroking) valve.
Replace pressure reducing valve (see para 4-191).
24
EXCESSIVE PRESSURE BUILD-UP
Check for defective pump pressure compensating valve in main hydraulic pump.
Refer to Direct Support maintenance.
4-68
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