Ring; Fig. 29; Spring - Makita HR4001C Technical Information

R
epair
[3] DISASSEMBLY/ASSEMBLY
8) Remove Torque limiter assembly from Gear housing complete by tapping the edge of Gear housing complete with
plastic hammer. If Torque limiter assembly remains on Crank housing complete, remove by tapping the edge of
Crank housing complete. (Fig. 29)

Fig. 29

Change plate
9) After removing Change plate from Torque limiter assembly, remove Ball bearing 6904LLU and Ball bearing 608DDW
from Torque limiter assembly using Bearing extractor (No.1R269). (Fig. 30)
10) Then remove Cup washer, Conical compression spring 19-27 and Driving flange from Torque limiter. (Fig. 31)
Important: Never try to disassemble Torque limiter because it cannot be reassembled once disassembled.
Fig. 30
No.1R269
Change plate
Ball bearing 6904LLU Ball bearing 608DDW
11) When Crank shaft still remains in Crank housing complete, remove by first rotating Crank shaft till the crank pin is
placed at the rear dead point, then tapping Crank housing complete with plastic hammer. (Fig. 32)
12) The assembly of Crank shaft and Helical gear 38 can be disassembled using arbor press as illustrated in Fig. 33.
Fig. 32
Crank housing complete
Crank pin
at the rear dead point
Crank shaft
Fig. 33
Bearing plate
(No.1R022)
Crank shaft
Helical gear 38
Torque limiter assembly
Gear housing complete
Assembly of
Crank shaft and
Helical gear 38
Crank shaft
Retaining
ring S-12
Ball bearing
6904LLU
Torque limiter assembly
Change plate
Crank housing complete,
viewed from the Gear
housing side
Fig. 31
Cup washer 8
Conical compression

spring 19-27

Driving flange
Torque limiter
(Do not disassemble.)
Crank housing complete,
viewed from the Gear housing side
Retaining
Bearing extractor
ring S-12
P 11 /20
(No.1R269 )
Crank shaft
Ball bearing
6904LLU