Makita HR2021 Technical Information page 4

R
epair
< 4 > Disassembling change lever
1. Disassemble cap from change lever by twisting the flat head screwdriver inserted between cap and change lever,
as illustrated in Fig. 2.
2. Turn the change lever fully to the direction of rotary hammer mode and pull off change lever from gear housing
as illustrated in Fig 2A.
< 5 > Assembling change lever
1. Apply grease RA No.1 (Brown) to the top of change lever's pin. See Fig. 2B.
< Note > The neglect of the grease to the pin portion can be cause of the damage on the change lever.
during the work in "rotation only" mode.
2. Aligning change lever with the rotary hammer mode, assemble it by pressing to the assembling hole
as illustrated in the above Fig. 2A. And assemble cap by pressing to change lever.
< 6 > Disassembling armature
1. Disassemble handle cover by unscrewing tapping screw 4 x 25. And disassemble carbon brushes
as illustrated in Fig. 3.
2. Separate gear housing together with armature, from motor housing by unscrewing tapping screws 4 x 45
as illustrated in Fig. 3A.
3. Slightly hitting the edge of gear housing with plastic hammer, remove armature from inner housing assembled in
gear housing. See Fig. 3B.
4. Ball bearings of fan side and commutator side can be disassembled with No.1R269 "Bearing extractor (small)".
See Fig. 3C.
Brush holder
Carbon brush
Handle
cover
Cap
Approach first from this side.
Fig. 2
Brush holder
Carbon brush
Tapping s
crew 4 x 25 : 3 pcs.
Fig. 3
No.1R269 "Bearing extractor (small)"
Change lever
Apply grease to the pin, before assembling.
Tapping s
crew 4 x 45 : 4 pcs.
Gear housing
Motor housing
Fig. 3A
P 4 / 18
Fig. 2A
Fig. 2B
Gear housing
Inner housing Inner housing
Plastic hammer Plastic hammer
Fig. 3B Fig. 4B
Ball bearing
Armature
Fig. 3C