Pipe plug, sq-hd, 3/4 in. (2)
1 1 Spindle
Pipe plug, sq-hd, 1 in.
16 Retaining ring
1 7 Differential pressure nozzle
1 8 Dowel pin
19 O-ring (2)
20 Bare manifold lubricator
Section VI. PROPELLING CONTROL VALVES
6-40. inspection and Repair
This section contains repair instructions for
a. Inspect all parts for wear and damage.
the propelling control valves. The propelling
b. Inspect all hardware for damaged threads.
control valves supply air to the propelling air
Retap or rechase threads if stripped or crossed,
motors to tram the pneumatic drill either for-
or replace if unservicable.
ward or reverse. There are two valves used,
one for each traction drive, and quantities
c. Note that disc (11) and body (8) are
specified throughout this section are for one
matched parts and may not be replaced indi-
d. Replace O-ring (9).
Remove the propelling control valves as ,de-
Reassemble propelling control valve in re-
Disassemble propelling control valve in the
verse of numerical sequence as illustrated on
numerical sequence as illustrated on figure
Install the propelling control valves as de-
Clean all parts with an approved sol-
vent, and blow dry with compressed air.