9
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 10 AND 11
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 10 AND 11
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.
Temporarily plug the 1/8 NPT port in the motor backhead with
a pipe plug.
Invert unit and clamp in vise on the handle flats with motor gear
up.
NOTE: The exhaust deflector moves forward approximately
3/8" when rapid advance lever is depressed.
Apply 90 PSI air to the inlet bushing. Do not press drill button.
Operate the rapid advance lever and release, several times.
The 9/32" dia. steel ball should seat without leakage, and there
should be little or no slack in the lever. Pin 847031 may require
hand grinding to proper length. Make certain the air supply is
shut off and drained before removing pressure cap 382507. If
the pin is too short, get a new pin and resize. Tighten pressure
cap securely.
It does not matter whether the rotor has been turning or not; but
the following method should get the motor running with the
least chance of rubbing.
Place wrenches on the motor housing hex and the turnbuckle
collar flats rotating them together to loosen the threaded joint
between the turnbuckle collar and the motor backhead 1/4
turn.
Put a few drops of 10W machine oil into the inlet bushing and
apply 90 PSI air pressure to the motor unit. Press the drill
button. The motor should run forward at governed speed. Then
using both wrenches, tighten the motor housing and the
turnbuckle collar in unison to securely clamp the motor unit.
Adjust governed speed when needed by removing the motor
backhead and rotating the governor adjusting ring 867214.
Rotate clockwise to decrease the R.P.M. and counterclock-
wise to increase the R.P.M. setting.
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