Gear Section - Makita HR4501C Technical Information

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[3] DISASSEMBLY/ASSEMBLY

[3] -9. Gear Section

DISASSEMBLY
1) Disassemble the following parts from Crank housing complete.
* Chuck section (Figs. 4 to 11) * Barrel section (Figs. 13 and 14) * Handle section and Controller (Figs. 46 to 48)
* Motor section (Figs. 50 to 55)
After removing the above parts, Gears and Crank shaft are left in Crank housing complete.
2) Disassemble Gears and Crank shaft from Crank housing complete as illustrated in Figs. 56 and 57.
Fig. 56
Flat washer 10 is left in Gear housing
complete in the step of Fig. 55.
Flat washer 10
After removing
Flat washer 10,
disassemble
Retaining ring
S-14.
Fig. 57
Remove Crank shaft by carefully
striking the specific position of Crank
housing complete as illustrated right
while keeping Connecting rod in right
angle to the removing direction of
Crank shaft.
Otherwise, Connecting rod
may be broken.
ASSEMBLY
Do the reverse step of Disassembly illustrated in Figs. 56 and 57. Refer to Fig. 58 when assembling Gear section.
Fig. 58
Face the protrusion side of Helical gear
36 to Gear housing installation side
when assembling Helical gear 36.
Otherwise, Helical gear 36 interferes
with Torque limiter's Rotation.
After removing Helical gear 36,
Torque limiter assembly can be
removed.
1R291 Helical gear 36
Retaining
Ring S-14
Crank shaft
Connecting
rod
Helical gear 36
Crank shaft
Spur gear 19
Torque limiter
Torque limiter
assembly
Retaining
ring S-17
Protrusion
P 18/ 23
Remove Spur gear 19 and
Key 5 from Crank shaft.
Spur gear 19
Key 5 (2pcs.)
Ball bearing
6303LLU
Gear Housing
Installation Side
Key 5