b.
Cleaning and Inspection.
(1)
Clean all parts with cleaning solvent (Fed
Spec P-D-680) and dry thoroughly.
(2)
Inspect the fittings and valve for thread
damage or other defects.
c.
Installation.
(1)
Install the hydraulic pump shut-off valve as
illustrated in figure 4-7.
(2)
Operate the rock drill (para 2-5) and check
for leaks.
Section VII. MAINTENANCE OF THE PNEUMATIC SYSTEM
4-17.
General
The rock drill pneumatic system consists of an air line
lubricator, hydraulic pump drive air motor, pressure
regulator, two tramming motors, feed motor, drill motor,
feed control valve and the necessary hoses and fittings.
Refer to figure 1-3 and figure 1-4 for the air system
schematic diagram.
4-18.
Air Line Hoses and Fittings
a.
Removal.
(1)
Position the rock drill feed assembly in the
horizontal position and block the end of the feed.
(2)
Disconnect the main air supply at the
lubricator, open the blow handle (fig. 2-1) and release all
the air from the system.
(3)
Remove the hose manifold as illustrated in
figure 4-8.
4-15
