6
SERVICE INSTRUCTIONS — DISASSEMBLY
MOTOR DISASSEMBLY
Slip the front bearing plate and bearing off the front of the
rotor and remove the cylinder and four (4) rotor blades. Set
the rear bearing plate on the vise jaws with the rotor hanging
down. Use a 7/32" punch to drive the rotor out of the rear rotor
bearing.
DL BLACKHEAD DISASSEMBLY
For inspection or replacement of the throttle valve seal, No.
847426, unscrew and remove the throttle valve cap, No.
832207.
Unscrew the air inlet bushing, No. 867882, for inspection
and cleaning of the air inlet screen, No. 833300, and the
muffler, No. 869510. If either the screen or muffler is clogged
or torn, it should be replaced.
RDO HANDLE DISASSEMBLY
For inspection or replacement of the throttle valve, unscrew
the air inlet bushing, No. 867916. The air inlet screen, No.
412775, should also be inspected at this time. Replace the
screen if clogged or torn.
The muffler, No. 869200, may be removed for cleaning and
inspection by removing the muffler screen retainer, No.
847033.
DISASSEMBLY - GENERAL - ALL MODELS
Non-Reversible Models
Insert a hex wrench into the drill chuck and tighten the chuck
securely. Use a suitable hammer to strike the hex wrench
sharply in a counterclockwise direction when facing the
chuck. Remove the drill chuck from the spindle. Unscrew
and remove the gear case. The motor unit may now be
removed from the front of the handle. See the following
paragraphs for complete disassembly instructions on the
various subassemblies.
Reversible Models
Press the adjustment sleeve off the chuck and drive the roll
pin out of the chuck and spindle. Unscrew (left hand threads)
the spindle bearing retainer and remove the spindle assem-
bly from the front of the gear case. Clamp the spindle in a vise
and unscrew the chuck. The spindle may now be pressed
out of the spindle bearings.
Unscrew and remove the gear case. The motor unit may now
be removed from the front of the backhead. See the follow-
ing paragraphs for complete disassembly instructions on the
various subassemblies.
GEAR TRAIN DISASSEMBLY
Unscrew (left hand threads) the spindle bearing retainer
202031. The spindle may now be pressed out of the spindle
bearings.
If replacement of the idler gear pins is necessary, the old pins
should be pressed out the rear and the replacement pins
pressed in as shown in the following diagrams.
SINGLE REDUCTION MODEL
DOUBLE REDUCTION MODEL
.240
(6.10mm)
.255
(6.48mm)
Front
Rear
.360
(9.14mm)
.375
(9.53mm)
Front
Rear
.240
(6.10mm)
.255
(6.48mm)
Front
Rear
Summary of Contents for 8DL Series
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