Makita HR4010C Technical Information

P 11 /20
Repair
[3] DISASSEMBLY/ASSEMBLY
Fig. 29
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)
Gear housing complete
Torque limiter assembly
Change plate
Crank housing complete,
viewed from the Gear
housing side
Crank housing complete,
viewed from the Gear housing side
Torque limiter assembly
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. 31
Torque limiter
(Do not disassemble.)
Cup washer 8
Driving flange
Conical compression
spring 19-27
Crank housing complete
Crank pin
at the rear dead point
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.
Assembly of
Crank shaft and
Helical gear 38
Fig. 30
Fig. 32
Fig. 33
Ball bearing 6904LLU Ball bearing 608DDW
Change plate
No.1R269
Crank shaft
Crank shaft
Crank shaft
Retaining
ring S-12
Retaining
ring S-12
Ball bearing
6904LLU
Ball bearing
6904LLU
Helical gear 38
Bearing extractor
(No.1R269 )
Crank shaft
Bearing plate
(No.1R022)

Makita HR4010C Specifications

General

Impact rate	2750 bpm
Rated speed (max)	480 RPM
Impact energy (max)	9.5 J
Weight (including battery)	6713 g
Carrying case	Yes
Power source	AC

Weight and Dimensions

Depth	470 mm