Makita AR410HR dimensions Top view

P 11/20

Repair

[3]DISASSEMBLY/ASSEMBLY

[3]-5. Air Motor Section

ASSEMBLING

2)Assemble Upper drum cap to Drum as described in Fig. 20.

Fig. 20

Assemble Spring pin 2.5-5 (2 pcs) to Drum.	Visually check if Upper drum cap is properly set on Drum.
Then set Upper drum cap on Drum,	If properly set, two holes of Drum can be seen through the
with Spring pin 2.5-5 of Drum fitting in the	sausage-shaped hole of Upper drum cap.
corresponding insertion hole of Upper drum cap.

Spring pin 2.5-5

Upper	Upper
drum cap	drum cap

Drum

Drum

[Top view]

sausage-shaped hole

two holes

3)Assemble Lower drum cap to Drum as described in Fig. 21.

Fig. 21

1.Assemble Ball bearing 689ZZ to Lower drum cap using 1R027 and arbor press.

Set Drum on Lower drum cap, with Spring pin 2.5-5 of Drum fitting in the corresponding insertion hole of Upper drum cap.

1R027 Drum

Ball bearing 689ZZ

Lower drum cap

2.Support Drum with 1R027 at the Ball bearing 689ZZ of Lower drum cap. Then apply another 1R027 to the Ball bearing 689ZZ in Upper drum cap, and firmly assemble Upper drum cap and Lower drum cap to Drum by pressing down Upper drum cap and Drum using arbor press until they stop.

1R027

Upper drum cap

1R027

3.Assemble Spur gear 21 to the hexagonal end of Rotor shaft protruding from Lower drum cap.

4.Assemble Internal spur gear section to Air motor section, with the ribs of Internal spur gear 44 fitting in the cut portion of Lower drum cap.

Spur gear 21

Lower drum cap

Upper drum cap

	Lower drum cap
Air motor	cut portion
section
		ribs with larger
	Flat washer 15	intervening width
		Internal spur gear 44