Dynatech BBM Additional Maintenance And Repair Instructions - Page 4

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BBM & YBM INSTRUCTIONS [May 2004]

Replacing the Armature Bearings

1. Use a small gear puller and remove the bearings on both sides of

the armature.

Inner Motor Bearing -- P.N. 235122 35mmx15mm bore 6202LB

Outer Motor Bearing -- P.N. 235112 26mmx10mm bore 6000LB

2. Press the large inner motor bearing onto the fan side of the

armature making sure the bearing "seats" against the shoulder on

the armature shaft.

3. Press the small outer motor bearing onto the back side of the

armature making sure the bearing "seats" against the shoulder on

the armature shaft.

Replacing the Field Windings

1. Use a Phillips head screw driver to remove the two screws holding

the field windings in the plastic motor housing.

2. Using a pair of needle nose pliers, disconnect the terminals

connecting the field winding to the brush holders.

3. From the open side of the housing, pull the field winding out of the

motor housing.

4. With the brush connector edge leading, align the hole in the field

winding with the holes in the motor housing and then push the new

field winding into the motor housing.

5. Insert the two field winding retaining screws and then use a Phillips

head screw driver and tighten.

6. Using a pair of needle nose pliers, re-connect the terminals from the

field winding to the spade on the brush holders.

NEVER ATTEMPT ANY OF THE INSTRUCTIONS WITH POWER CONNECTED TO SAW!