Oscillating Cylinder Check Valve - TM-10-3930-242-340188

TM 10-3930-242-34

6-8. Oscillating Cylinder Check Valve

stall t h e h y d r a u l i c slave c y l i n d e r ( T M

10-3930-242-12).

a. General. The purpose of the oscillating cy-

b . Disassembly. Refer to figure 69 and re-

linder check valve is to hold the machine stable

m o v e the hydraulic slave cylinder.

d u r i n g any type of operation. Should the check

v a l v e malfunction the machine will lean to the

NOTE

s i d e when operating on a slope. The oscillating

The Army model 200 and Army model 222 cylinders

c y l i n d e r check valve is located on the front of

a r e of identical construction and have identical

components. The cylinder used on the Army model

the forklift between the two automatic slack ad-

202 has slightly different internal components, but

justers.

maintenance procedures are similar. The hydraulic

b. Removal.

slave cylinder for the Army model 202 is illustrated

(1) Raise the extension boom assembly and

in TM 10-3930-242-34P/2.

i n s t a l l safety supports.

c. Cleaning and Inspection.

(2) Refer to figure 6-8 and remove the oscil-

(1) Clean all metal parts thoroughly, using

l a t i n g cylinder check valve.

solvent

P-D-680, or

equal.

Dry parts

thoroughly.

c. Cleaning and Inspection.

(1) Clean the oscillating cylinder check

(2) Inspect the parts for wear, scored areas,

s c r a t c h e s , nicks, and burrs.

valve thoroughly, using solvent P-D-680, or

( 3 ) Inspect the cylinder for cracks and dis-

equal.

tortion.

(2) Inspect the valve for leakage, cracks and

( 4 ) Replace defective parts.

damage.

d. Reassembly. Refer to figure 6-9 and reas-

(3) Replace a damaged or leaking check

s e m b l e the hydraulic slave cylinder.

valve. A slight leak will cause the valve to mal-

function.

NOTE

d . Installation.

Upon reassembly, use new packing. Torque the

(1) Refer to figure 6-8 and install the oscil-

rod end nut to the value specified in paragraph

l a t i n g cylinder check valve.

1-7b (8),

( 2 ) Remove safety supports and lower the

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

e x t e n s i o n boom assembly.

h y d r a u l i c slave cylinder in a similar manner.

f. Installation. Install the hydraulic slave cy-

6-9. Hydraulic Slave Cylinder

linder (TM 10-3930-242-12).

a. Removal and Installation. Remove and in-

6-10. Hydraulic Side Shift Cylinder

a. Removal. Remove the hydraulic side shift

cylinder (TM 10-3930-242-12).

b. Disassembly. Refer to figure 610 and dis-

a s s e m b l e the hydraulic side shift cylinder.

NOTE

The Army model 200 and Army model 222 cylin-

ders are of identical construction and have identi-

cal components. The cylinder used on the Army

model 202 has slightly different internal compo-

n e n t s , but maintenance procedures are s i m i l a r .

T h e hydraulic side shift cylinder for the Army

model 202 is illustrated in TM 10-3930-242-34P/2.

c. Cleaning and Inspection.

(1) Clean all metal parts thoroughly, using

solvent P-D-680, or equal. Dry all parts

thoroughly.

(2) Inspect the parts for wear, scored areas,

s c r a t c h e s , nicks and burrs.

(3) Inspect the cylinder for cracks and dis-

tortion.

( 4 ) Replace defective parts.

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

Figure 6-8. oscillating cylinder check valve, removal and

s e m b l e the hydraulic side shift cylinder.

installation.

6-10