Milwaukee 5339-20 Einrichtungshandbuch

58-92-5305 d1 022005

Cat. No. 5339-20

SDS Max Demolition Hammer

Cat. No. 5342-20

SDS Max Rotary Hammer

MILWAUKEE ELECTRIC TOOL CORPORATION

13135 W. LISBON ROAD • BROOKFIELD, WISCONSIN 53005-2550

REPAIR

INSTRUCTIONS

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Special Tools

Require –Forcing discs 61-10-0011

–Hex key 4 mm

–Hex key 5 mm

–Sleeve 61-10-0013

–Pin-type face spanner 61-10-0012

–Spindle Fixture (optional) 61-30-0290

Important!–Before beginning the maintenance work, perform an initial check with a high voltage test.

–Before performing repair work, disconnect the power cord from the electrical outlet!

Disassembly

Removing the

auxiliary handle 1Remove handle (1) by turning it counter-

clockwise.

Disassembling

the handle 1Unscrew knob (3) and remove screw (1).

2Press spring ring (2) in direction of the ar-

rows and remove handle (4).

0011

0012

0013

0290

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

spring ring 1Remove both retainers (1).

2Slightlyspreadspringring(2)andpullitoff

the machine towards the front.

Removing the

end cover cap ☞Position machine in a vertical position.

1Depress sleeve (2) and remove end cover

cap (1) with aid of a screwdriver.

2Remove sleeve (2).

3Remove retaining ring (3).

4Remove the following parts:

–damping element (4)

–damping ring (5)

–interlock sleeve (6).

☞Removing/leveringoff damping ring(5)

prior to removing retaining rings (3) will

be an alternative method of spindle

disassembly

Removing the

interlock

elements

1Depress interlock plate (2) against pres-

sure springs (3) until interlock elements

(1) are released. Remove them, if neces-

sary with aid of a screwdriver.

2Remove the following parts:

–interlock plate (2)

–pressure spring (3),

–washers (4).

☞Usingservicefixture#61-30-0290,with

two legs removed, will allow equal

pressure to be applied to both sides of

the interlocking elements for easy re-

moval.

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

seal retainer 1Remove four screws (1) with a 5 mm hex

key.

2Turn seal retainer (2) 45° and remove it

with a plastic face hammer from below

(see illustration).

☞Removal of seal retainer (2) only re-

quires light hammer blows at each of

the four screw holes. Striking seal re-

tainer with heavy blows can damage

retainer.

Disassembling

the seal retainer 1Remove outer o-ring (2) from seal retainer

(1).

2Remove inner seal ring (3) from seal re-

tainer (1).

3Remove retaining ring (4) from the gear-

box.

Removing the up-

per gear box cov-

1Remove six screws (1) with washers from

the gear box cover.

2Remove gasket (2) from groove of gear

box (3).

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

lever 1Removeadjustingplateassembly(4)from

pin (2) located on lever (1).

2Squeeze spring (5) together at the bottom

side of lever (1) and remove lever from

gear box cover.

3Remove O-ring (3).

☞When removing adjusting plate (4)

from pin (2) take care to not bend

spring assembly.

Combined

drill/chisel

hammer:

Removing

spindle assembly

1Loosen spindle assembly (1) by turning it

slightly and pulling it from the front of the

gear box (in direction of arrow).

☞In case of stiffness, lightly tap gear box

(2) with a plastic face hammer. Spindle

assembly (1) will be released in direc-

tion of arrow.

Chisel

hammer:

Removing

spindle assembly

1Remove retaining ring (3) using retaining

ring pliers from spindle groove.

2Loosen spindle assembly (5) by turning it

slightly and pulling it from front of gear box

(in direction of arrow).

☞In case of stiffness, lightly tap gear box

(4) with a plastic face hammer. Spindle

(5) will be released in direction of ar-

row.

3Remove retaining ring (3), washer (2) and

O-ring (1) from gear box (4).

321

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Disassembling

the spindle as-

sembly

1Remove thrust collar (1) from spindle (4).

Remove O-ring (2) from thrust collar (1).

2Remove ram assembly (5) from spindle

(4) by tapping it lightly with a plastic face

hammer.

Remove O-ring (6) from ram (5).

3Remove retaining ring (3) from spindle.

Disassembling

the spindle as-

sembly

1Remove following parts from spindle (D):

–roller race (1)

–washer (2)

–o-ring (3)

–attachment washer (4).

2Remove four rollers (C) with a magnetic

screwdriver from spindle (D).

☞In case of stiffness, remove rollers (C)

with light taps with a plastic face ham-

mer. Twist the spindle and driver back

and forth while tapping to aid in easy

roller removal.

3Remove striker guide (5) from spindle (D).

4Remove striker (7) and o-ring (6) from

striker guide (5).

5Remove three o-rings (8) from striker (7).

6Remove thrust collar (9), pressure o-ring

(A), and washer (B) from spindle (D).

678

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

piston assembly 1Position piston assembly (5) into the back

dead center position.

2Combined drill/chisel hammer:

Remove spindle bevel gear (3) from gear

box.

3Remove set collar (1) and locking plate (2)

from gear box.

4Removethe piston assembly (5) upwards.

Remove o-ring (4) from piston (5).

Disassembling

the motor hous-

ing

1Remove the two screws (1) from service

cover (2) and remove service cover (2) in

direction of arrow.

2Lift springs (3) on both sides of carbon

brush cover and pull carbon brushes out

(4). Pull the carbon brush leads off.

3Remove four hex head screws (4) from

the motor housing.

4Pull gear box (5) with the armature from

the motor housing.

☞Carbon brush set consists of two

brushes, one brush has a secondary

lead incorporated into it. This lead

must be disconnected from the elec-

tronic module at this time.

124

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Disassembling

the armature 1Remove three hex head screws (8) from

bearing end plate (7) and pull complete ar-

mature assembly (B) with bearing end

plate (7) from gear box (1).

2Remove o-ring (2) from gear box (1).

3Insert the pin-type face spanner (61-10-

0012)(3)intosealnut(4)andremoveseal

nut (4) counter-clockwise. Remove bear-

ing end plate (7).

4Remove retaining ring (5) from bearing

end plate (7) and press out bearing (6).

5Separate fan (9) from armature (B) with

forcing discs (A).

6Remove bearing cup (D) and press off

bearing (C).

☞If armature fan (9) requires removal,

use service fixture (A) #61-10-0011 as

illustrated. (Follow fan reassembly pro-

cedure).

Removing the

crank wheel 1Remove following parts from gear box (8):

–crank wheel (1)

–thrust washer (2)

–thrust bearing (3)

–thrust washer (4).

2Combined drill/chisel hammer:

Additionally remove clutch (5) from gear

box (8).

3Remove caged needle bearings (6 and 7)

by simply lifting them out of the gear box.

☞The chisel hammer does not have a

clutch (5) and needle bearings (6 & 7)!

☞No cleaning solvent should penetrate

into clutch; wipe any old lubrication off

clutch assembly using a dry, clean rag.

23456

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

lower gear box

cover

1Remove two screws (1) and remove lower

gear box cover (2).

☞The exposed plane surface serves

only for manufacturing the gear box

and has no other function!

Disassembling

the electronic

component

1Remove the four screws (1) from the

handle and remove handle half (2).

2To remove cord leads, remove/loosen two

screws (4) from switch (3).

3Remove screws (5) from cord clamp (6)

and remove the cord (7).

4Remove the following parts:

–four o-rings (C)

–two wires (D)

–two screws (A)

–two carbon brush holders (B)

–electronic part (E)

–four screws (8)

–side handle plate (9).

PAGE

INSTRUCTIONS

REPAIR

58-92-5305 d1

Removing the

anti-vibration

mechanism

and the field

1Remove air deflector ring (5).

2Remove screw (4). Remove the following

partsof the anti-vibration mechanismfrom

motor housing (8):

–thrust piece (1)

–spring (2)

–vibration lever(3).

☞Caution: Screw (4) and vibration spring

cover (1) are under spring pressure.

3Remove two screws (7) and remove field

(6) from motor housing (8).

☞Should the field be stuck, tap motor

housing (8) lightly with a plastic face

hammer.

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