11
REASSEMBLY—MOTOR HOUSING AND
RUNNING MOTOR
Same as on page 9 & 10.
DESIRED FORWARD ROTOR SPEED
At the selected speed setting (80, 160, 320, or 650) the rotor
speed should be 8200 - 9700 RPM.
The motor speed should change smoothly as the speed is
adjusted step by step.
Reverse rotation (rapid advance lever depressed) should be
5,700 RPM minimum.
IF SHIMS ARE LOST, OR IF ROTOR SPEED IS IMPROPER
Remove motor unit and clamp in vise with the governor
assembly upward and the governor weights leaning inward.
Add or adjust shims 864732 and 869562 to provide this
clearance:
Reassemble and run motor. If the desired forward rotor speed
is still not acceptable (8200 - 9700 RPM); disassemble motor
backhead and add shims 203349 under governor spring
382238 to increase speed, or remove shims to decrease
speed.
Continue reassembly same as single speed tools
FINAL REDUCTION ASSEMBLY:
Reassemble in the reverse order of disassembly. Grease all
parts with a good grade of NLGI 2-EP grease. Install the
washer and ball bearing 864471 on the front of the output
spider. Clean the threads on the spider and pinion gear
382461. Hold a large hex wrench or similar tool on the side of
the spider and clamp in the vise. Apply a thread locking liquid
to the threads and screw the pinion into the spider (tighten to
approximately 60 ft. Ibs.—81.4Nm). Use Tool Maintenance Kit
for easier assembly.
HEAD REASSEMBLY:
UPPER BLOCK:
The retract valve must slide freely
(without O-ring) By its own weight inside the bore. Lubricate
and assemble O-ring 844306, retract valve 382333, spring
382540, and tighten valve cap 382331. Press (press on the
bearings stamped end) the needle bearing 617253, into the
rear of the gear stop 382547. The bearing should be flush with
face. Assemble O-ring 863009, on feed piston 382548 lubri-
cate and fit into bore. Piston should move with finger tip
pressure. Press the gear stop into bore. Apply a drop of thread
locking liquid on the two (2) screws 812667 and tighten them.
Screw the two (2) set screws, 382637 in until they are nearly
flush with the bore (must clear spring case). Place a drop of
thread locking liquid on the outer thread of each screw.
Assemble the thrust package as shown into the spring case.
Clamp the spring case and upper block in the vise, aligning the
spring case and compressing until the 5/32" dia. spotface is in
the position shown. Tighten each set screw 1 & 1/2 turns, and
remove from vise. The set screws should retain spring case;
but allow spring stack to compress and "spring back".
Note: Milled slot on top rim of spring case must be visible
through cast window in the upper block.
VISE
.001
.006
