ing (52). Place a motor case gasket
gear so that the lock pin fits into one
(13) over the screws, install casing
of the holes in the gear.
cover (14), and place another motor
If ball bearings (17) were removed
case gasket (13) over the screws.
from planet gears (18) use a suitable
bearing pusher to bear on the outer
Note. Install casing cover (14) so that
the raised portion is facing outward, and
is perpendicular to the clutch lock pin
gears. Using retaining ring pliers, in-
stall four retaining rings (16) in the
planet gear grooves.
(13) Install assembled propelling air mo-
Install assembled planet gears (18)
tor (10), and secure with lock wash-
ers (9) and nuts (8).
of drive shaft (42). Using retaining
(14) Install pipe plug (3) and magnetic
ring pliers, install retaining rings
plug (1) with gasket (2).
(16) in the stub grooves, to lock the
(15) Install studs (6).
planet bearings in place.
Note. If the traction drive is to be in-
Insert motor pinion gear (12) be-
stalled immediately, do not install lock
washers (6) and nuts (4).
tween the planet gears until meshed,
and press or tap the gear into motor
pinion ball bearing (41) installed in
Install the complete traction drive as de-
the bore of drive shaft (42).
Insert screws (7) through gear hous-
Section XIII. MAIN FRAME AND TRACK ASSEMBLY
mum) under the frame to collect the rock drill
oil from the reservoir, and remove magnetic
This section contains repair instructions for
drain plug (7) with gasket (8) from the bot-
the main frame and track assembly. This assem-
tom of the reservoir.
bly forms the basic structure for the pneumatic
drill, on which all of the various units are
d. Remove remaining parts only as nec-
mounted. In addition, the lubricating oil reser-
voir is an integral part of the frame.
Clean all parts with an approved solvent and
Disassemble main frame and track assembly
blow dry with compressed air.
in the numerical sequence as illustrated on fig-
ure 6-30. Note the following special pro-
6-88. Inspection and Repair
a. Only if necessary to remove traction units
a. Inspect all parts for wear and damage.
of the frame from the traction units. Remove
b. Inspect all hardware for damaged
bolts (1) and nuts (2) to free the traction units
threads. Retap or rechase threads if stripped or
from the frame.
crossed, or replace if unserviceable.
b. Only if necessary to remove tow hitch
(4), straighten the ends and remove cotter pin
Reassemble main frame and track assembly
in reverse of numerical sequence as illustrated
c. Remove oil filler plug (5) with O-ring
(6). Place a container (2 gallon capacity, mini-