Safety, Operation & Service
If required, the spring cap 382514 must be drilled and
tapped for removal. Clamp the body of the rotor in the
vise and unscrew the pinion 617609 or nut 382522.
Before disassembling the governor, note which
"step" the adjustment ring pin 867187 is "on" in the
adjustment ring 867214. Depress the adjustment ring
and remove the pin. Remove the pin retainer 864532
and remove the two (2) governor weight pins 867184.
DISASSEMBLY—MOTOR BACKHEAD
Important Note: Pressure cap 382507 must not be
unscrewed while the motor backhead is connected to
air supply. This cavity is supplied with high pressure
air whenever the backhead is connected to the air
system. Remove pressure cap, spring 864681, ball
812156, and pin 847031. Rapid advance valve
382501 may be removed by unscrewing valve cap
382502 and removing retainer ring 869460. The rapid
advance lever 382503 may be removed by unscrew-
ing (3/16" hex) the flat head cap screw 382504.
DISASSEMBLY— HANDLE
Unscrew plug 864387 and remove drill button spring
622833. Depress the drill button 382484 and use a
1/8" diameter rod to unscrew button guard 382671.
Unscrew inlet bushing 867758 and remove spring
863072 and throttle valve 202365.
Unscrew end cap 382668 and spring 382489. Push
out throttle piston 382677.
Screw a 1/4-20 cap screw into the metering seat
382491. Clamp the cap screw in the vise and use a
soft faced hammer to drive the handle off.
Filter 382505 located in 13/32" dia. hole adjacent
to the metering seat should be checked and replaced
if necessary.
The emergency stop button 381243 should not be
removed unless the O-ring 844301 needs replacing.
Clamp the stop button in the vise and use a soft faced
hammer to drive the handle off. Tap the bushing
202354 with a 1/4-20 thread. Screw a 1/4-20 bolt in
the vise. Drive the handle off.
Unscrew the check valve seat 382487 and remove
O-ring 844302, 3/16" steel ball 842161 and check
valve spring 382488. NOTE: Spring is very small.
FOR VARIABLE SPEED TOOLS,
SEE PAGES 14 - 17
REASSEMBLY— GENERAL
The tool is reassembled in the reverse order of
disassembly. Clean all parts thoroughly in a solvent
and inspect for damage or wear. Check all bearings
for wear which can be detected by excessive end play
and/or roughness which would indicate a brinelled
condition. Inspect and replace any O-ring that is
damaged or worn. Rotor blades should be replaced at
every repair cycle or if they measure less than 1/4"
(6.35mm) at either end. All gear teeth, bearings, and
pins should receive a close inspection and be
replaced if necessary.
All gears and bearings in the planetary gear train
should receive a generous amount of NLGI 2-EP
grease during reassembly.
All gears and bearings in the right angle drill head
should receive a generous amount of "Lubriplate #
907" grease during reassembly.
Lubricate all O-rings during reassembly with 10W
machine oil.
HANDLE REASSEMBLY:
Insert throttle piston 382677 (with O-rings) into throttle
piston cylinder 382676. Replace spring 382489 and
end cap 382668.
Rotate the throttle piston 382677, to line up the slot
for the throttle valve 202365. Replace spring 863072,
O-ring, and inlet bushing 867758. If the screen in
the inlet bushing is torn or clogged, replace the
inlet bushing.
Page 11
EN-823122
February 17, 2004
Quackenbush
Operating and Safety Instructions
