Table 3-2. Organizational Troubleshooting Data

TM 55-1730-208-13

Section V. OPERATIONAL CHECKOUT

operating procedure to insure trouble is not due to

3-15. General.

incorrect operation.

This section provides information useful in

3-16. Performance Checks.

diagnosing and correcting unsatisfactory operation or

(Not applicable.)

failure of the hydraulic jack. Each trouble symptom

stated is followed by a list of probable causes. The

possible remedy recommended is described opposite

3-17. Troubleshooting Data.

the probable cause. Any operational trouble beyond

Refer

to .table

3-2

for

organizational

the scope of organizational maintenance must be

troubleshooting data applicable to the hydraulic jack.

reported to the next higher maintenance level as

applicable. Before looking for a trouble, check the

Table 3-2. Organizational Troubleshooting Data

Malfunction

Probable Cause

Jack will not rise capacity load

Faulty safety relief valve

Replace safety relief valve.

High pressure leak at hose or

Tighten or replace hose or plug.

plug

Leaking discharge valve

Replace valve body.

Leaking release assembly

Tighten release assembly.

Defective ram packing

Replace ram packing.

Defective pump body packing

Replace pump body packing.

Jack will not support load.

Leaking safety relief valve

Replace safety relief valve.

Leaking hose fitting

Tighten or replace fitting.

Leaking discharge valve

Replace pump body.

Leaking release assembly

Tighten release assembly.

Ram lock nut assembly not

Loosen retainer screw on ram

against cylinder

lock nut assembly, turn against

cylinder, and tighten retainer

screw.

Defective ram packing

Replace ram packing.

Jack will not lower load

Broken release assembly

Replace release assembly.

Bent ram

Replace cylinder and ram

assembly.

Ram lock nut not against

Loosen retainer screw on ram

cylinder

lock nut assembly, turn against

cylinder, and tighten retainer

screw.

Ram will not raise

Lack of hydraulic fluid

Service hydraulic system.

Clogged screen

Clean screen

Sticking intake or

discharge Operate pump handle rapidly to

valve ball

free sticking ball.

Open release assembly

Close release assembly.

Bent ram

Replace ram.

Ram will not rise to full

Lack of hydraulic fluid

Service system.

height

Clogged screen

Clean screen.

Closed air vent assembly

Open air vent assembly.

3-4