parts in an approved solvent to re-
move all traces of lapping compound.
housing (53). Using retaining ring
(9) Install dowel pins (22 and 23) in
pliers, install retaining ring (43) in
rotary valve (24) if they were re-
the housing groove to lock the bear-
moved, and insert the rotary valve in-
ing in place.
to rotary valve bushing (41).
Press motor pinion ball bearing (41)
(10) Install valve chest cover (21).
into the recess in drive shaft (42). In-
(11) Aline bolt holes in valve chest (40)
sert the drive shaft into gear housing
with those in motor case (43), and
(63), tapping with a mallet to seat
press the projecting end of rotary
the drive shaft shoulder against drive
valve bushing (41) into the motor
shaft ball bearing (44). Using re-
taining ring pliers, intall retaining
(12) Make sure that the bushing enters the
ring (40) in the shaft groove.
motor case bore squarely (with the
Lay brake band assembly (39) around
bolt holes alined) and press the valve
drive shaft (42) so that the trunnion
chest on until it contacts the motor
can be inserted in the hole leading to
brake cylinder (37). Insert brake
band anchor pin (31) through the
Note. Support the open end of the
motor case during this operation.
loop in the brake band assembly and
screw it into the tapped hole in gear
(13) Aline the holes in the end of valve
housing (53), until the end of the
end crank (30) with the dowel pins
pin is slightly below the upper shoul-
of rotary valve (24) and install the
der of the brake band assembly.
assembled crank assembly into motor
Insert brake shaft setscrew (29). Back
case (43). Make sure that ball bear-
off setscrew 1/2 turn and tighten jam
ing (39) is seated properly in the mo-
(14) Rotate the crank until one of the con-
Install brake cylinder (37) with
necting rods is at top dead center.
brake cylinder case gasket (38).
Place a piston (18) over this rod and
Mount brake spring washer (33) and
secure with wrist pin (16) and wrist
brake spring (34) on bolt (32) and
pin caps (14).
install the bolt to the required dis-
(15) Using a suitable piston ring compres-
tance for proper brake adjustment
sor to hold oil regulating ring (17)
and piston ring (16) compressed, in-
Install O-ring (28) on brake piston
stall cylinder (12) with cylinder gas-
(27) and install in the brake cylinder
ket (13) over piston (18) and into
(37). Install brake cylinder cover
the cylinder wall in motor case (43).
(25) and brake cylinder gasket (26).
Secure with screws (10) and washers
Install setscrew (20) and jam nut
(21). Turn the setscrew in until it
(16) Repeat steps 14 and 15 until all pis-
contacts the piston. Back off 1/8 turn
tons and cylinders are installed.
and secure the jam nut. Apply 60 psi
(17) Install all plugs and caps.
air pressure through a 1/4-inch hose
b. Complete Traction Drive. Reassemble
nipple connected to the release port
complete traction drive in reverse of numerical
in the brake cylinder cover, and make
sure the brake can be rotated by hand.
the following special procedures:
Install clutch parts (45 through 52).
Install internal gear (19) in gear
clean oil to facilitate reassembly.
housing (53). Pull clutch lock pin
(1) Using a suitable fixture to bear on the
handle (46) and align the internal
outer race, press drive shaft ball