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P 11/17
[3] DISASSEMBLY/ASSEMBLY
[3] -7. Recommended Fastening Torque of Screws and Bolts
Repair
Tighten the bolt to the recommended torque described in Fig. 21.
Fig. 21
Fig. 22
[4] MAINTENANCE PROGRAM
When replacing carbon brush, it is recommended to do the following maintenance at the same time
for longer service life of the machine.
1) Replace the parts described in Fig. 22 with new ones.
2) Wash out or wipe off old grease in Crank housing complete, and lubricate the parts
in accordance with the instructions in [2] LUBRICATION. (Refer to Fig. 1.)
Chuck cover Guide washer Change ring
Impact boltTool holder
Steel ball 4.8
Ring 21 Striker Cylinder Piston
Connecting rod
Ring 29
1
23
Cap 38
Item No. Description
Urethane Ring 26
Steel ball 7.0 (2 pcs)
O Ring 12
Rubber Ring 13
O Ring 18 (thick one)
27
28
37 38
9
Barrel
Crank housing
complete
19
19
Item No.
Fastening Torque
Q'ty
Description
4
7.8 - 11.8 N.m
M5 x 25 Hex socket head bolt
1
239 27 28 3837