Makita DCS550 Technical Information page 9

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Armature
DISASSEMBLING
1) Remove Motor section and Gear housing from Handle R as illustrated in Fig. 16 on page 7.
2) Remove Carbon brush then Gear housing and Shaft lock. (Fig. 25)
3) Separate Housing R from Housing L by unscrewing four 4x18 Tapping screws.
Take out Motor assembly consisting of Armature, Yoke unit and End bell complete. (Fig. 26)
4) Pull off Armature from Endbell complete through Yoke unit. (Fig. 27)
Fig. 25
Brush holder cap
Carbon brush
Compression
spring 6
Gear housing
ASSEMBLING
1) Put Armature through Yoke unit.
Note 1. Yoke unit is not reversible when assembled to Armature. Be sure to assemble so that the notch in Yoke unit is
positioned on the drive-end of Armature as illustrated to left in Fig. 28. If assembled wrong, Motor assembly cannot
be assembled to Housing L.
Note 2. Because Armature is pulled strongly towards Yoke unit by the magent force of Yoke unit;
1. Be sure to hold the gear portion of Armature as illustrated to left in
as illustrated to right or your fingers will be pinched between Yoke unit and the fan of Armature.
2. Be careful not to damage the copper wire of Armature.
Fig. 28
[Correct]
notch
Fig. 26
Shaft lock
Fig. 29
[Wrong]
notch
Tapping screw 4x18 (4 pcs)
Housing R
Motor assembly
Housing L
Fig. 29. Do not hold the Armature core
[Correct]
P 9 /13
Fig. 27
Armature
Endbell
complete
Yoke unit
[Wrong]
Your fingers can be pinched
and injured.