Dynabrade Grinder Series User manual

Disassembly, Assembly Instructions - 2.8 hp Grinder/Sander Series:
Ø7"& 9", Right Angle
Models: Use for all models.
Important: Disconnect from the air supply.
Notice: Use these instructions along with the specific tool manual for each model.
To avoid damage, use the proper repair tools designed for motor disassembly and
assembly.
! Remove any flanges, abrasive, back-up disc or guard.
Motor Disassembly: (Tutorial shows tool with 54951 Spindle. - Applies to all models.)
1. Fasten housing in vise (bronze or aluminum jaws) with throttle handle pointing up.
• Use a 4mm hex key to remove 95720 Screws (4). Turn counterclockwise.

2. Remove throttle handle assembly.
! Remove 54961 Spacer, 54960 Motor Spring, and 54958 Gasket.
54958 Gasket
54960 Motor Spring
54961 Spacer

3. Remove 54953 Governor Chamber.

4. Use soft-faced hammer to knock motor assembly loose from housing and remove.

5. Carefully, fasten pinion gear in vise (bronze or aluminum jaws).
! Use a slot-blade screwdriver to remove governor assembly. Turn clockwise.
Left Hand Thread

6. Fasten 96346 Bearing Separator (2") around 54905 Cylinder. Place separator and
motor in 96232 Arbor Press (#2) with pinion gear pointing down.
! Use a Ø ⅛" flat-end drive punch to push rotor out of 54907 Bearing.
96232 Arbor Press
96346 Bearing Separator

7. Use external ring pliers to remove 54907 Bearing from 54880 Rear End Plate.

8. Remove 54904 Vanes from 54903 Rotor.

9. Use 95262 Wrench (14mm) to remove pinion gear. Turn counterclockwise.
14MM

10. Remove; 54900 Bearing, 54901 Front End Plate along with shims and 54902
Spacer.
Motor disassembly completed.
Clean and inspect parts. Replace all parts that are worn or damaged.