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