Makita HR4013C Technical Information page 15

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-5. Motor
DISASSEMBLING
(1) Do the steps until four 5x25 Tapping screws are removed according to [3]-3-(9) of the previous pages. (Fig. 19)
(2) Loosen two 4x18 Tapping screws and then remove Rear cover. (Fig. 40)
(3) While holding Fan by a gloved hand, turn M6 Hex nut counterclockwise using Cordless impact driver with Socket bit
10.(Fig. 41)
(4) Because Carbon brushes are pressed with Spiral springs to maintain their contacts with Armature's commutator.
Slide and detach the spiral springs from Carbon brushes and put them aside. Check that Carbon brushes are detached
from Commutator of Armature. (Fig. 42)
(5) Tap Armature shaft and then pull Crank housing and Gear housing to remove them from Motor housing. (Fig. 43)
Armature is removed together with Gear housing. (Fig. 44)
(6) Remove Armature from Gear housing with 1R045. (Fig. 45)
ASSEMBLING
Assemble by reversing the disassembly procedure.
Fig. 40
4x18 Tapping screw (2 pcs.)
Rear cover
Fig. 43
Crank housing
Fig. 45
Fig. 41
Cordless impact driver with Socket bit 10
Armature shaft
1R045
Fig. 42
Spiral spring
M6 Hex nut
Fig. 44
Gear housing
Crank housing
P 15/ 19
Carbon brush