Ring 33; Fig. 17 - Makita HR4001C Technical Information

R
epair
[3] DISASSEMBLY/ASSEMBLY
4) Remove Lock sleeve from Crank housing complete as illustrated in Fig. 17. Then remove Spiral bevel gear 25.

Fig. 17

Push the rear end of the rod of Lock sleeve
from the crank room side.
5) In order to separate Cylinder from Crank housing complete, first remove Ring spring 31 from the end of Cylinder 28.5
with a small screwdriver. Then remove Ring 33 from Cylinder 28.5. (Fig. 18)
HR4010C/ HR4011C: Two Seal plates, Air pipe and two Air pipe seals can be replaced in this step. (Fig. 19)
Fig. 18

Ring 33

6) Set Cylinder Extractor (No.1R213 ) and two diameter 60 Rings (No.1R350) on Cylinder 28.5 and Crank housing
complete as illustrated in Fig. 20. And pull off the Cylinder by turning the handle of the Extractor clockwise.
Use two Phillips screwdrivers as illustrated in Fig. 21 if No.1R213 and No.1R350 are not available.
Fig. 20
No.1R213
No.1R350
Fig. 19
HR4010C/HR4011C
Ring spring 31
Turn the handle
clockwise to remove
Cylinder 28.5.
Grasp Cylinder 28.5 by
inserting the pins of
No.1R213 into the side
holes of the Cylinder.
Crank housing comp.
Cylinder 28.5
Lock sleeve Straight bevel gear 25
Seal plate
Fig. 21
Insert two Phillips screwdrivers into the side holes
of Cylinder 28.5, and lever up the Cylinder.
Phillips Screwdriver
Put pieces of wood or the like
to protect the machined surface
of Crank housing complete from
damages and scratches.
P 8 /20
Air pipe
Air pipe seal
Cylinder 28.5
Crank housing
comp.