Milwaukee 5339-20 Repair Instructions page 20

REPAIR
INSTRUCTIONS
SDS Max
1 Secure hammer gear box in a machinists
vise.
combined
drill/chisel
2 Install service fixture #61-10-2060 into
hammer: front spindle.
3 Engage / lock external splines of set collar
into internal splines of spindle bevel gear
To check static
(figs. 2 and 3).
slip of clutch
4 Install a piece of nylon bar stock or equiv-
alent material, approximately 3/4" x 1-1/8"
in between locking plate and gear box.
Turn service fixture slowly clockwise until
nylon bar stock is wedged tight between
wall of gear box and crank wheel, as
shown (fig. 3). Once crank wheel has been
secured, continue to turn torque wrench in
a clockwise direction until clutch slips.
5 Clutch must slip at 96-140 ft. lbs. (130-190
Nm.) at spindle, checked clockwise as
viewed from the front of the tool. (Refer to
note below).
Note: If the static slip of the clutch doesn't
fall between the listings, do the following:
Run the tool at the highest speed ("G" on the
dial switch) for 10 minutes. Immediately re-
move gear box cover and insert recommend-
ed nylon / plastic block into gear box to
prevent gears from rotating. Turn the torque
wrench clockwise and slip the clutch 8 times
before actual slip torque readings are taken.
Take an additional 8 slip torque readings and
determine the average of the 8 readings. The
average should be within the torque range
specified.
Spline ham-
1 Install service fixture #61-10-2065 into
front spindle.
mer:
2 Install a piece of nylon bar stock or equiv-
alent material, approximately 3/4" x 1-1/8"
To check static
into gear box on the opposite side of pis-
slip of clutch
ton connecting rod. Turn service fixture
slowly clockwise until nylon bar stock is
wedged tight between wall of gear box
and crank wheel, as shown (fig. 1). Once
crank wheel has been secured, continue
to turn torque wrench in a clockwise direc-
tion until clutch slips.
3 Clutch must slip at 96-140 ft. lbs. (130-
190 Nm.) at spindle, checked clockwise
as viewed from the front of the tool. (Refer
to note above).
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20
58-92-5305 d1