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P 11/20
Repair
[3] DISASSEMBLY/ASSEMBLY
[3]-5. Air Motor Section
Fig. 20
Fig. 21
2) Assemble Upper drum cap to Drum as described in Fig. 20.
3) Assemble Lower drum cap to Drum as described in Fig. 21.
two holes
sausage-shaped
hole
1R027
Spur gear 21
Assemble Spring pin 2.5-5 (2 pcs) to Drum.
Then set Upper drum cap on Drum,
with Spring pin 2.5-5 of Drum fitting in the
corresponding insertion hole of Upper drum cap.
Visually check if Upper drum cap is properly set on Drum.
If properly set, two holes of Drum can be seen through the
sausage-shaped hole of Upper drum cap.
[Top view]
Spring pin 2.5-5
Drum
Drum
Drum
Upper
drum cap
Upper
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.
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.
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.
1R027
Ball bearing
689ZZ
Lower drum cap
Lower
drum cap
1R027
Upper
drum cap
Flat washer 15
ribs with larger
intervening width
cut portion
Lower drum cap
ASSEMBLING
Upper
drum cap
Air motor
section
Internal spur gear 44