TM 5-3820-241-34
CHAPTER 5
MAINTENANCE OF THE FEED SYSTEM COMPONENTS
Section I. FEED MOTOR
5-1. General
The rock drill feed motor is a four cylinder,
reversing air powered motor, driven through a
16:1 reduction transmission attached to a
sprocket chain drive. The motor pulls the drill up
or down along the feed assembly.
5-2. Feed Motor Removal and Disassembly
a. Removal.
(1) Position the rock drill boom 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) Remove the feed motor in numerical
sequence as illustrated in figure 5-1.
5-1
