6
INSTALLING A SPINDLE:
Run a "Tool Crib Check" (page 5)
Important: Retract stop collar
2
382579 must be in place and
locked on the spindle. Install the spindle in the spindle drive
gear 617200 and use spindle "in & out" tool 382593 to push the
spindle "in". Depress the green drill button to start the motor
and raise the manual retract lever
5
. The spindle will retract.
Release the drill button. The spindle will continue to retract until
the retract stop collar
7
depresses the signal valve
8
and the
tool will automatically shut off. Note: When the retract stop
collar
7
is near or touching the signal valve
8
; Do not press the
green drill button
4
; as this will prevent tool shutoff and jam the
spindle into the head.
CHANGING FEED GEARS
—Remove (left hand threads) the
adjustable depth stop
6
from the rear of the spindle. Using the
spindle "in & out" tool 382593 to support the front of the spindle,
depress the rapid advance lever
2
and feed the spindle forward
until the spindle feeds itself out of the spindle feed gear.
Release the rapid advance lever, shut off the air supply, and
pull the spindle out of the spindle drive gear. Remove the side
hose assembly. Unscrew and remove one (1) 6-32 x 1 (7164"
hex) socket head cap screw 382539 and two (2) 1/4-20 x 2-
1/4 (3/16" hex) socket head cap screws 867839 Note: Clamp-
ing the tool in a vise will make removal of the screws more
convenient. Insert finger in spindle feed gear to prevent the
eighteen (18) 7/32" balls 842160 from being lost when remov-
ing upper block assembly and spindle feed gear. Remove
differential feed gear. Remove gear holder 382557. Refer to
the feed chart on assembly drawing for the appropriate feed
gears. The feed gears are marked with the number of teeth
each one has— example 33T (thirty three teeth). After install-
ing the replacement gears, be sure that gear holder 382557 is
aligned and in place. The right angle head should be securely
clamped in the vise and compressed so that the two (2) cap
screws 867839 and cap screw 382539 can be firmly tightened.
SHEAR PIN MAY SHEAR BECAUSE:
1. Motor doesn't stop at full retract, or the retract valve did not
reset. Retract collar
7
jams into housing cover 382582 or
382591. Pin shears.
2. Packed chips or dull cutter may overload the spindle. Feed
rate may be too high. Drilling or reaming may be beyond the
torque capability of this right angle drill. Pin shears.
3. Improper adjustment of lift arm assembly may prevent
automatic retract when the depth stop
6
contacts the drill
head. If this occurs possible damage to gears and shearing
of pin will result.
4. Gear teeth have broken, spindle threads have been dam-
aged, or parts inside the drill head have failed.
DOES NOT REQUIRE DISASSEMBLY:
1. Does not require disassembly of drill head, spindle may be
freed in this manner:
A. Turn off air supply.
B. Remove tool from drilling fixture.
C. Rotate spindle with wrench (CCW from rear). . .
opposite drilling direction 2 or 3 turns. This will
require high torque.
D. When spindle is free, replace shear pin. Leave the
pin guard in place. Supply air pressure and rapid
advance the spindle out of the drill head.
E. Correct malfunction and run "Tool Crib Check".
2. Turn off air supply.
A. Remove tool from drilling fixture.
B. Correct torque overload problem.
C. Replace shear pin.
D. Make sure the pin guard is in good condition and
in place.
E. Return tool to service.
3 and 4 require disassembly, cleaning, inspection, and re-
placement of damaged parts inside the drill head. All parts
inside the drill head should be washed and re-greased. When
cause of malfunction is corrected, run "Tool Crib Check" (page
5).
SHEAR PIN INSTALLATION AND REMOVAL
CHANGING RAPID ADVANCE CLUTCH SPRING:
Unscrew
and remove the clutch cover 382537. Drive the shear pin out
of the driven gear 629046 and clutch shaft 382525. Remove
clutch assembly from right angle head. Clamp the clutch
assembly in the vise to remove the spring load before driving
the roll pin 415019 out of the lower clutch jaw 382535. Remove
from the vise and slip the clutch shaft 382525 out of the pinion
and clutch hub 382526.
CHANGING THRUST PACKAGE:
Remove the upper block
assembly following the instructions for changing feed gears
(place finger into the spindle feed gear to keep the eighteen
(18) balls from falling out). Remove the feed gear and eighteen
(18) balls. Clamp the spring case 382663 and upper block
assembly in the vise to compress the thrust package. Use a
7/32" hex wrench to remove the two (2) 1 0-32 x 1/4" set screws
382637. Remove the assembly from the vise and slip the
spring case and thrust package out of the upper block.
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