Hydraulic Oscillating Cylinder

TM 10-3930-634-34

and support it with support arms provided. Oscillate

(3) Inspect the cylinder body for cracks and distor-

machine fully to the left. (With machine in this posi-

tion.

tion, there is no need to block between frame and axle

(4) Replace defective parts.

housing.) Tag hydraulic hoses for identification.

d. Reassembly. Refer to figure 6-10 and reassemble

(2) Refer to figure 6-11 and remove the oscillat-

the lift cylinder.

ing cylinder.

NOTE

b. Disassembly. Refer to figure 6-12 and disassem-

Upon reassembly, use new packing. Torque

ble the hydraulic oscillating cylinder.

the rod end nut to 900-1000 lb-ft torque, as

c. Cleaning and Inspection.

specified in paragraph 1-7b(8).

(1) Clean all metal parts thoroughly, using solvent

e. Test. Refer to paragraph 6-5e and test the hy-

P-D-680 or equal. Dry parts thoroughly.

draulic lift cylinder in a similar manner.

(2) Inspect parts for wear, scoring, scratches,

f. Installation. Refer to figure 6-9 and install the

nicks and burrs. Inspect hoses for deterioration and

hydraulic lift cylinder.

cuts.

NOTE

(3) Inspect cylinder body for cracks and distor-

The hydraulic lift circuit has a holding and

tion.

overcenter relief valve located inside the

(4) Replace defective parts.

right hand frame. This valve does not require

d. Reassembly. Refer to figure 6-12 and reassemble

any maintenance, service or adjustment. It is

the oscillating cylinder.

preset at 3000 psi.

NOTE

6-7. Hydraulic Oscillating Cylinder

Upon reassembly, use new packing. Torque

the rod end nut to the valve specified in para-

a. Removal.

graph l-7b(8).

(1) Place machine on level ground, raise the boom