TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
69. NO OIL FLOWS IN HYDRAULIC SYSTEMS
Step 1.
Reservoir-to-pump supply line broken or restricted. Air
entering at suction lines. Pump not priming.
a. Inspect all hydraulic lines for leaks. If OK, do Step
2.
b. Clean, repair, or replace hydraulic lines as
necessary. Check all lines for security, suction
lines for cracks, and proper attachment. Tighten,
repair or replace components as necessary. (Refer to
pages 16-38 and 16-40.)
Step 2.
Hydraulic pump failure.
a. Contact Direct Support Maintenance.
70. EXCESSIVE HYDRAULIC PRESSURE BUILDUP
Step 1.
System hydraulic relief valve set too high.
a. Use adequate pressure gauge and adjust system
hydraulic relief valve as necessary. If OK, do Step
2. (Refer to page 16-54.)
Step 2.
Restricted pump-to-control valve hydraulic supply line.
a. Remove and inspect hydraulic line.
b. Clean or replace hydraulic line. (Refer to pages
16-38 and 16-40.)
71. PUMP NOISE. ACCOMPANIED BY OIL FOAMING IN RESERVOIR
Step 1.
Air entering at suction lines. Low oil level.
a. Check all hydraulic lines for security and proper
attachment.
b. Tighten, repair or replace components as necessary.
c. Ensure that oil level in reservoir is adequate. Fill
to HIGH mark on sight gauge. (Refer to LO 5-3810-306-
12.)
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