5
SERVICE INSTRUCTIONS
DISASSEMBLY
Eye protection must be worn when disassembling tool or when air line is turned on. A
self relieving valve in close proximity to the repair station to bleed off air is recom-
mended.
WARNING
!
move the rotor shaft retainer, No. 843618, and using a soft
mallet tap the rotor shaft out of the front rotor bearing, No.
613248. This will allow the front bearing plate, No. 613273,
the cylinder, No. 613225, rotor blades, No. 613236, and
the rotor, No. 613234, to be removed. Remove the two (2)
keys, No. 863365, from the rotor shaft, No. 613274, and
clamp it in the vise with the governor up. To remove the
front rotor bearing from the front bearing plate for inspec-
tion, the rotor bearing retainer, No. 613294, (Left Hand
Treads) must be unscrewed first.
DRILL HEAD
To disassemble the drill head, unscrew the four (4) stop
body screws, No. 617245, and remove the stop body, No.
624106, with its attached components. Loosen the two (2)
set screws No. 202583, and remove the gear stop.
Removing the three (3) piston body screw, No. 624651,
will allow the cylinder, No. 624618, and attached compo-
nents to be removed from the housing. Unscrew the three
(3) cover screws, No. 847688, and remove housing cover,
No. 624636, with its attached components. By tapping the
housing on a soft block of wood, the bevel gear, No.
614217, and attached bearing, No. 864471, may be
removed.
GENERAL
Remove all tubing from the tool and clamp the tool lightly
on the flats of the motor housing in a soft jawed vise and
loosen the lock ring, No. 619421, and unscrew the drill
head from the power unit.
POWER UNIT GEAR TRAIN
Remove the lock ring. Using a suitable wrench, unscrew
the internal gear, No. 613285, from the motor housing.
No. 613275. The planet cage, No. 613277, or No. 612050,
with the attached components may now be removed from
the rear of the internal gear. Unscrewing the bevel gear,
No. 614216, will allow the removal of the front planet cage
bearing, No. 864471, and the planet cage washer. By
pulling the three (3) planet gear pins, No. 613279, out of
the front of the planet cage, the planet gears may be
removed.
MOTOR UNIT
To remove the motor unit from the motor housing, invert
the tool in the vise. Loosen the handle nut, No. 613283,
and remove the handle. The complete motor unit may now
be slipped out through the rear of the motor housing.
Unscrew the governor ( Left Hand Threads) and remove
the rear bearing plate, No. 613241, from the shaft. Re-
INSTALL SPINDLE FROM
THIS DIRECTION ONLY.
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