cam pinion handle (25) from the top of the
backhead, and slide rotation selector cam pin-
This section contains repair instructions for
ion (26) out from the bottom of the backhead.
the drifter drill.
g. Remove backhead cap (27), and all piston
parts (29 through 35) from backhead (36).
Note. If the parts do not come out easily, insert
Remove the drifter drill as described in
a screwdriver into the cam pinion hole of the back-
head, and force out' the piston.
h. Force rotation paw1 housing (38) out of
air inlet housing (42), and remove rotation
Disassemble drifter drill in the numerical
pawl housing key (39), rotation pawl plung-
ers (40), and rotation pawls (41).
the procedures specified below:
i. Remove the assembled valve chest parts
a. If the shank piece is attached to the drift-
from cylinder (54) by inserting a 3/4-inch di-
er drill, remove chuck jaw retainer bolts (1, fig.
ameter bolt (approximately 10 inches long) in-
6-1) and nuts (2), and separate chuck jaw re-
to the cylinder with the head down. Engage the
tainer (3) with the shank piece.
bottom of valve chest cover (49) with the bolt
b. Remove hose stem (4) with related parts
and pull the parts out of the cylinder.
(5 through 9), air connection plug (10), and
Caution: When the valve chest parts are
blower hose connection (12) with related parts
removed, be careful not to lose valve chest
(13 and 14).
c. Remove tube retainer (15) and O ring
(16). Remove blower tube (19) with blower
j. Slide out valve chest cover (49). Remove
tube washer (17) and blower tube rubber
valve (46). Separate front valve chest (47)
from the valve chest cover by inserting a screw-
d. Remove nuts (21) and assembly rods
driver through the ports in the cover and tap-
(20), and pull air inlet housing (42) and
ping evenly with a mallet.
backhead (36), with assembled parts intact,
Caution: Tap the front valve chest evenly
from cylinder (54).
to avoid cocking the part in the cover.
Note. The air inlet housing and backhead are re-
k. Insert rifle bar (37) through the cylinder
moved together to avoid the possibility of the rota-
tion pawls (41) falling out.
(54) and wedge it into piston (51). Pull the
piston out of the cylinder.
e. Separate air inlet housing (42) from back-
l. Separate the cylinder (54) with assembled
head (36), and remove rifle bar (37).
parts, from fronthead (60).
f. Remove rotation selector cam (22) from
m. Insert a brass bar into cylinder (54), and
backhead (36). Remove nut (23), external
tooth lock washer (24), and rotation selector
tap out piston stem bearing (52).