Safety, Operation & Service
Insert spring 382489, O-ring 844307, and latch piston
382490, into handle. Line up the air ports in the
metering seat 382491, and handle 382480, and tap
the metering seat into the handle until the shoulder on
the seat is flush with the surface of the handle. Use a
1/4-20 bolt to tap or press the metering seat. Install the
drill button and shaft assembly 381171, using a thread
retaining compound. Install the drill button spring
622833 and plug 864387 with O-ring.
Press the stop button assembly 381243, into the
handle until the shoulder on the bushing is flush with
the handle.
When installing the check valve assembly, the spring
382488, should be installed with the small coil up. Use
a slender rod. Place the 3/16" steel ball 842161, on
the small coil and the O-ring 844302, on the top of the
ball. Install the check valve seat 382487, and O-ring
844303, and tighten firmly.
MOTOR BACKHEAD REASSEMBLY:
Install rapid advance valve 382501, muffler plate
382506, and retainer ring 869460. Put on muffler
869850, exhaust deflector 869844, and valve cap
382502. Fit rapid advance lever 382503, into detents
and tighten flat head screw 382502, tight.
Place 9/32" steel ball 812156 in 25/64" dia. hole and
rap with a soft metal punch to form aluminum seat.
Be certain that pin 847031 moves freely in hole.
Install pin, ball, spring 864681, and pressure cap
382507.
FOR VARIABLE SPEED TOOLS,
SEE PAGES 14 - 17
MOTOR AND GOVERNOR REASSEMBLY:
Assemble governor and pin retainer 864532. Seat the
front rotor bearing 842870, in the front bearing plate
382521, and support the bearing on its outer race.
Measure from the face of the bearing plate to the
bearing inner race. Select or fit by sanding a rotor
collar .002" longer than this measurement. Install the
rotor collar (chamfered side first) and bearing plate
assembly on the rotor. Tighten rotor pinion 617609,
or rotor nut 382522, to approximately 35 ft. Ibs.
(47.5 Nm). When installing the rotor blades 382520,
be certain that the rotor blade kick-out pins are
working. Assemble the three (3) rotor blades, cylinder
867377, rear bearing plate 867369, rear bearing
864522, and governor assembly. Be certain pin
retainer 864532, is in place. Tighten (left hand
threads) the governor assembly or rear rotor nut
382523, almost as tight as the pinion gear or front
rotor nut.
FOR VARIABLE SPEED TOOLS,
SEE PAGES 14 - 17
MOTOR HOUSING AND RUNNING MOTOR:
Work the motor unit into the housing and clamp the
housing in the vise with the governor assembly up.
Work the muffler element 382517, into the exhaust
deflector 382516. Assemble the O-ring 864589, onto
the turnbuckle collar 382508. Place spring 619394,
on motor housing 382509, and work the exhaust
deflector on, compressing the spring. Screw (left
hand threads) the turnbuckle collar on until the
3/32" dia. hole in the front of the exhaust deflector is
half covered.
Screw the motor backhead onto the motor housing
(prevent turnbuckle rotation), clamping the motor unit
securely. Use two (2) 1/4-20 cap screws and wooden
hammer handle to tighten the motor backhead.
Install gasket 382492, and handle 382480, on the
backhead—16 ft. Ibs. (21 .7 Nm) minimum. Be sure to
include filter 382505.
Page 12
EN-823122
February 17, 2004
Quackenbush
Operating and Safety Instructions
.002” Gap after Assembly
3/32” Diameter
