Hydraulic Lift Cylinders.

Maintenance of Forklifts
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MAINTENANCE OF FORKLIFTS - OD1660 - LESSON 1/TASK 1

(a) Cleaning and Inspecting.

1 Clean all metal parts thoroughly, using solvent P-D-680 or

equal.

The parts should be dried thoroughly.

2 The cylinders should be inspected for wear, scored areas,

scratches, nicks and burrs.

3 The

cylinders

should

also

inspected

for

cracks

and

distortion.

4 All defective parts should be replaced.

NOTE

Upon reassembly, use new packing.

The rod end

nut should be torqued between 170 to 180 ft-lbs.

(b) Test.

The hydraulic slave cylinder should be tested in a

similar manner to the hydraulic tilt cylinder, described in paragraph

6d(l)(b), beginning on page 19.

(3) Hydraulic Lift Cylinders.

(a) The hydraulic lift cylinders are of the double-acting two-

stage type. There are two cylinders, one mounted on each side of the

mast between the forklift frame and the mast.

(b) This cylinder is activated by the control valve and raises

and lowers the fork carriage.

They have fittings at the top for

bleeding air from the system.

NOTE

When working on the lift cylinders or with the

mast raised, use supports to block the mast.

1 Clean all metal parts thoroughly, using solvent P-D-680, or

equal.

All parts should be dried thoroughly.