Makita HR4013C Technical Information page 11

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epair
[3] DISASSEMBLY/ASSEMBLY
[3]-3. Crank housing, Cylinder, Counter weight (cont.)
ASSEMBLING
Assemble the components by reversing the disassembly procedure.
(1) Put Piston section into Crank housing.
(2) Insert Crank section (drawn in Fig. 21) straight into the hole of Crank housing by hand so that the outer periphery of
Ball bearing 6004LLU is slightly held in the hole of Crank housing.
(3) Move the pin of Crank shaft to the closest position to Handle installation side (Fig. 20), and turn Crank housing
upside down and put on 1R258 with care not to move the pin position. (Fig. 23)
(4) Pressfit Ball bearing 6004LLU in place with 1R165 carefully so as not to cause misalignment between the pin of
Crank shaft and the hole of Connecting rod. (Fig. 24)
(5) Turn Crank housing upside down and put 1R165 between Arbor press table and Ball bearing 6004LLU, then fit
the pin of Crank shaft into the hole of Connecting rod using 1R306 and Arbor press. (Fig. 25)
(6) Once Oil seal 32 in Barrel complete is removed, using Socket bit 32-50 (Makita part No. 134848-9) makes it easy to
pressfit Oil seal 32 in place.
Fig. 23
Crank housing
Fig. 25
Arbor press
1R306
View from Handle side
1R306
Crank housing
Arbor press table
Pin of
Crank shaft
1R258
Ball bearing
6004LLU
Connecting rod
1R165
Fig. 24
View from
Handle side
Crank housing
Inside view of Crank housing
Pin of
Crank shaft
Arbor press table
P 11/ 19
Arbor press
1R165
1R258
1R165