TM 5-3820-241-34
(1) Coat all parts with a light coat of engine
(4) Reassemble the remaining components in
Oil.
the reverse of numerical sequence as illustrated in
(2) Insert the plug valve (7, Fig. 5-2) in the
motor housing (19) and align with the line up
b. Installation. Install the feed motor
assembly in the reverse of numerical sequence as
screw (3).
illustrated in figure 5-1.
(3) Install the piston rings (18) on the pistons
(17).
Section II. FEED TRANSMISSION
5-5. General
(2) Disconnect the air supply at the
l u b r i c a t o r fitting. Open the blow handle and
The rock drill is equipped with a positive acting,
release all air from the system.
gear type, transmission which is fully enclosed
(3) Refer to TM 5-3820-241-12 and remove
and grease lubricated. The transmission has a
the feed chain.
16:1 gear reduction train.
(4) Remove the feed motor (para 5-2).
5-6 Feed Transmission, Removal and Dis-
( 5 ) Remove t h e f e e d t r a n s m i s s i o n a s
assembly
illustrated in figure 5-3.
a. Removal.
(1) Position the rock drill feed mechanism in
the horizontal position.