Cranking speed to low

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Engine driven pump fails to raise pressure (Cont)

TM-55-1905-220-14-3 Landing Craft Unit LCU 1671-1679 (1905-01-009-1056) Manual

Table 3-70. Anchor Winch Engine - Hydrostarter Loss of Fluid from Reservoir Troubleshooting

TM 55-1905-220-14-3

Table 3-69. Anchor Winch Engine - Hydrostarter Cranking

Speed Too Low Troubleshooting.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Cranking speed to low.

Step 1.

Check that hydrostarter system fluid is not too heavy.

Check fluid in the system. Use hydraulic fluid MIL-L-17672, Type 2135 TH.

Step 2.

Check that engine oil is not too heavy.

Replace the oil with the proper viscosity grade.

LUBRICATING OIL GRADES

DESCRIPTION

SPECIFICATION

OES (Sub Zero)

MIL-L-10295

OE/HDO - 10

MIL-L-2104

OE/HDO - 20

MIL-L-2104

OE/HDO - 30

MIL-L-2104

Step 3.

Check for control valve that is not fully opens

Valve body sticking in valve housing. Replace valve cage and valve assembly.

Step 4.

Check for restricted inlet line.

Check plumbing from accumulator to hydrostarter to insure hoses are not collapsed and

are free of obstructions.

Step 5.

Check for excessive internal leakage in hydro-starter.

Examine around hydrostarter for broken thrust bearing plate, scored port plate, frozen

piston or broken cylinder spring.

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