Section-XIV. HYDRAULIC CYLINDERS

TM 5-3820-239-15

Section-XIV. HYDRAULIC CYLINDERS

hoses and fittings from the cylinders to be re-

3-45. General

moved.

The hydraulic cylinders used on the pneu-

b. Hydraulic Boom Cylinders. See figure

matic drill are all essentially identical in opera-

3-17 and remove the boom swing cylinder and

tion and design. The two cylinders used on the

the boom lift cylinder.

hydraulic boom assembly (boom swing and

c. Power Dump and Swing Cylinders. See

boom lift) (fig. 1-1) control the boom position

figure 3-18 and remove the dump cylinder and

both horizontally and vertically. The two cylin-

the swing cylinder from the power dump and

ders used on the power dump and swing assem-

swing assembly.

bly (swing and dump) (fig. 1-1) control the

d. Drill Guide Extension Cylinder. See

position of the drill guide. The remaining

figure 3-19 and remove the drill guide ex-

cylinder is a part of the power guide extension

tension cylinder.

mounting (fig. 1-1) The extension cylinder

moves the drill guide up and down within the

3-47. Installation

clamps of the extension mounting.

a. See figures 3-17 through 3-19 and install

the hydraulic cylinders.

3-46. Removal

b. See figure 1-5 and connect the hoses and

fittings,

a. General. See figure 1-5 and disconnect