Quackenbush 230QGDA Série Manuel D'instructions page 14

EN-823122
February 17, 2004
VARIABLE SPEED TOOLS
For disassembly of drill head and gear trains, see page
14-17.
DISASSEMBLY—VARIABLE SPEED MOTOR AND
GOVERNOR UNIT
Clamp handle in vise with motor housing upwards.
Unscrew both motor housing 382509 and turnbuckle
collar 382508 in unison from handle. Keep governor
center 382619, shims, and bearing 847095 together as
a unit. Replace this bearing if it is damaged.
CAUTION: Do not lose these shims. The same shims
must be used for reassembly.
Tap motor and motor housing on wooden bench top to
remove motor unit. Hold either the pinion gear 617609
or rotor nut 382522 and unscrew (left hand threads)
governor assembly. Remove rear bearing 864522,
bearing plate 867369, cylinder 867377 and three (3)
rotor blades 382520. Note: Check function of rotor
blade kick-out approximately 1/ 8". If required, the
spring cap 382514 must be drilled and tapped for
removal. Clamp body of the rotor in vise and unscrew
pinion 617609 or nut 382522. To remove governor
weights from spider, press governor weight pins
867184 out.
DISASSEMBLY—VARIABLE SPEED
MOTOR BACKHEAD
WARNING: 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 unscrewing (3/16" hex) flat
head cap screw 382504. Remove button head
screw 844288. That will release the governor valve
382618. Remove governor spring 382238, shims
202349, auxiliary spring cap 382264, spring 382271
(inside cap) and guide stud 382620. Caution: Do not
lose those shims. The same shims must be used
Safety, Operation & Service
Quackenbush
Operating and Safety Instructions
for reassembly. Remove set screw 382512 and
speed cam. Remove detent pad 382627, set screw
867502, and spring 512275 for inspection.
DISASSEMBLY—HANDLE Same as on page 14.
REASSEMBLY—GENERAL Same as on page 14.
REASSEMBLY—HANDLE Same as on page 14.
REASSEMBLY—VARIABLE SPEED MOTOR
BACKHEAD
Install rapid advance valve and related parts (same as
single speed tool). Lubricate O-ring 844307 on speed
cam. Assemble spring 512275, set screw 867502, and
detent pad 382627 onto backhead. Install speed cam
and lock set screw 382512. Install governor parts in
reverse order of disassembly and secure with button
head screw.
REASSEMBLY—VARIABLE SPEED MOTOR AND
GOVERNOR
Assemble governor weights 867189, pins 867184, and
spider 382621. Seat front rotor bearing 842870, in front
bearing plate 382521, and support bearing on its outer
race. Measure from face of the bearing plate to bearing
inner race. Select or fit by sanding a rotor collar .002"
longer than this measurement. Install rotor collar
(chamfered side first) and bearing plate assembly
on rotor. Tighten rotor pinion 617609, or rotor nut
382522, to approximately 35 ft. Ibs. (47.4 Nm).
When installing the rotor blades 382520, be certain that
the rotor blade kickout pins are working. Assemble the
three (3) rotor blades, cylinder 867377, rear bearing
plate 867369, rear bearing 864522, and governor
assembly. Tighten (left hand threads) governor
assembly almost as tight as pinion gear or front
rotor nut.
VARIABLE SPEED MOTOR HOUSING AND
RUNNING MOTOR
Work the motor unit into the housing and clamp the
housing into a vise with the governor assembly upward.
Assemble the governor center 382619, shims, and
bearing 847095, with the governor weights leaning
inward.
Page 14