Section X. HYDRAULIC LIFT SYSTEM MAINTENANCE

TM 10-3930-638-24&P

Section X. HYDRAULIC LIFT SYSTEM MAINTENANCE

This section contains the information you'll need to maintain the

hydraulic lift system. It gives you instructions on how to troubleshoot

problems, and repair or replace components that are within the scope

of organizational maintenance.

Para

Lifting Forks . . . . . . . . . . . . . . . . . . . . . . . 2-56c

Troubleshooting Symptom Index . . . . . . . . . . . 2-54

Lift Chains and Pulley s . . . . . . . . . . . . . . . . . 2-56d

Hydraulic Lift System Troubleshooting . . . . . . . .2-55

Sideshift Chains and Pulleys . . . . . . . . . . . . . 2-56e

Hydraulic Lift System Maintenance . . . . . . 2-56

Hoses, Lines and Fittings . . . . . . . . . . . . . . . 2-56f

Operational Test . . . . . . . . . . . . . . . . . . . . . 2-56a

Hydraulic Reservoir . . . . . . . . . . . . . . . . . . . 2-56g

Control Levers and Linkages . . . . . . . . . . . 2-56b

2-54. TROUBLESHOOTING SYMPTOM INDEX]

NOTE

A hydraulic system schematic is located at the back of this manual

in appendix F.

Para/Malfunction Page

HYDRAULIC LIFT SYSTEM

3-289

2-55/1

3-290

Load lowers too fast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-55/2

3-290

Load creeps downward . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-55/3

Unable to lift, tilt, shift, or rotate load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-291

2-55/4

Lift, tilt, shift, or rotate too slow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-291

2-55/5

Load creeps while tilting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-55. HYDRAULIC LIFT SYSTEM TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

NOTE

Also refer to paragraph 2-56a, operational test, for additional

troubleshooting data.

1. LOAD LOWERS TOO FAST

Step 1. Check hoses, lines and fittings between control valve and lift cylinder assembly for oil leaks.

a. If oil leakage is observed, tighten fittings; if hoses or lines are damaged, replace (para 2-56 f(l)).

b. If oil leakage is not observed, proceed to step 2.

2-389