Clarke 07097A Manual de usuario

56043143 Page 1

MODELS: 07097A, 07127A, 07128A

56043143 Page 2

Switch Replacement

1-Remove the two screws (13) securing the right handle (42)

2-Remove switch retaining nut (68)

3-Pull switch from handle (Fig. 25)

4-Remove tape from switch to expose wiring connections

5-Disconnect all wires from switch

Assembly Hints

Connect the light wires with the incoming power wires on the switch so that

the light is on when machine is plugged in

Always retape the switch to prevent shorting between metal objects inside

machine

Switch and on/off plate are indexed for proper orientation and should be

installed with the off position to the back

Pigtail Replacement

1-Remove the two screws (13) securing the right handle (42)

2-Disconnect the black and white pigtail wires from the switch and the ground wire (52) from the handle housing

3-Remove pigtail and strain relief assembly (9) from Handle housing

Assembly Hints

Always retape the switch to prevent shorting between metal objects inside machine

Motor Brush Replacement

1-Remove the screw (7) retaining the top cover (25)

2-Disconnect wires from field to brushes

4-Remove the two screws (53) securing each brush holder assembly (56)

5-Push the holder down and over to remove it from the field housing (Fig. 26)

6-Disconnect shunt wire and pull brush (59) out toward the brush side

Speed selection switch replacement

1-Remove four screws (6) securing the cover (19)

2-Remove the switch retaining nut (36)

3-Disconnect wires from switch

Assembly Hints

Black wire from field and diode ground wire connect to the Hi side of switch and the White wire from the field and the diode

terminal wire connect to the Lo side

Diode Replacement

1-Remove four screws (4) securing the field housing (28)

2- Remove field housing assembly by holding the handles and gently tapping down on the lower housing

3-Remove the diode securing nut (33) from inside the housing (Fig. 27)

Assembly Hints

Insulating washers (32) must be intact and installed on both sides of the field housing. The dust baffles can be retained with

super glue to keep them in place while reinstalling the field housing assembly if they were loosened during disassembly.

Fig. 25

Fig. 26

Fig. 27

56043143 Page 3

56043143 Page 4

Pad Removal and Replacement

1-Remove paper retaining bolt (37)

2-Wedge dust fan with screwdriver or similar object

3-Use spanner wrench (Fig. 28) or punch and hammer (Fig. 29) to remove pad

Note: When replacing the old style steel pad with the new style aluminum the fiber washers between the

pad and lower bearing must be discarded.

Gearbox Removal and Repair

1-Remove pad (35)

2-Remove wall guard

3-Remove three screws (31) from gear cover (29)

4-Press jackshaft (23), gear (22) and bearing (20) assembly out of the cover using the paper retaining

screw to prevent damage to the shaft

5-Remove retaining ring (20) and press the jackshaft out of the gear and bearing

6-Remove retaining ring (25) and press bearing out of the cover

Reassembly

1-Press bearing (27) in cover using outer race only

2-Install seal (26) and Retaining ring (25)

3-Install key (24) and press gear (22) on jackshaft

4-Press bearing (21) on jackshaft using the inner race only

5-Install retaining ring (20)

6-Press the jackshaft assembly into the cover assembly by pressing on the upper end of the jackshaft

while supporting the inner race of the cover bearing

Pinion Gear Removal

1-Remove four screws (4) securing the field housing assembly

2- Remove field housing assembly by holding the handles and gently tapping down on the lower housing

(8)

3-Remove the dust baffles (72)

4-Pry the armature assembly up and out of the lower housing (Fig. 30)

5-Remove retaining ring (78)

6- Use gear puller to remove bearing (76) and pinion gear (77) from armature

Reassembly

NOTE: Lower gearbox assembly must be removed when reinstalling the pinion

1-Press bearing (76) and seal (75) in lower housing (8)

2-Press armature into the lower housing assembly

3-Install key (74)

4-Press pinion gear on armature

5-Reinstall the lower gear housing assembly

Armature Replacement

1-Remove four screws (4) securing the field housing assembly

2- Remove field housing assembly by holding the handles and gently tapping down on the lower housing

(8)

3-Remove the dust baffles (72)

4-Pry the armature assembly up and out of the lower housing (Fig. 30)

5-Remove pinion gear (77) and bearing (76)

56043143 Page 5

Reassembly

1-Press uper bearing (71) on armature using the inner race only

2-Press bearing (76) and seal (75) in lower housing (8)

3-Press armature into the lower housing assembly

4-Reinstall pinion gear

5-Reinstall dust baffles

6-Reinstall the field housing assembly

Assembly Hints

Pinion and drive gears should always be replaced as sets

It is recommended that the upper and lower armature bearings be replace when installing a new armature

The dust baffles can be retained with super glue to keep them in place while reinstalling the field housing

assembly.

Fig. 28

Fig. 29

Fig. 30

56043143 Page 6

Symptom

Cause

Repair

Sander will not

turn on

No power at outlet

Check and repair power supply or move to

another outlet

Defective cord or plug

Check continuity and replace defective part

Defective switch

Replace switch

Broken wire or bad connection

on brush holder assembly

Repair or replace brush holder assembly

Extremely worn motor brushes

Replace brushes

Defective armature

Replace armature

Excessive arcing

at motor brushes

Brushes worn

Replace brushes

Broken wire or bad connection

on brush holder assembly

Repair or replace brush holder assembly

Worn or defective armature

Replace armature

Sander bounces

on floor when

sanding

Bent or damaged sanding pad

Dress or replace pad

Poor dust pick-up

Dust bag is over 1/3 full

Empty bag

Dust bag is dirty

Shake debris from bag and wash or replace bag

Obstruction in dust tube

Clear dust tube

Castors adjusted improperly

Adjust castors

Sander continues

to run in low speed

when switched to

high

Two speed switch is defective

Replace switch

Sander continues

to run in high

speed when

switched to low

Two speed switch is defective

Replace switch

Diode is defective

Replace diode

A Nilﬁsk-Advance Brand

14600 21st Avenue North

Plymouth, MN 55447-3408

www.clarkeus.com

Phone: 800-253-0367

Fax: 800-825-2753

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