Replacement Of The Piston Ass'y - Hitachi NR 1890DC Service Manual

NOTE: When replacing only the Piston Ass'y [15](15) with new one, also replace the Needle Roller
D4.5 [26](26) mounted in the Pin Wheel [27](27) with new one included in the brand-new
Piston Ass'y [15](15).
1. Disassembly
• Remove Housing (C) [45](45), magazine ass'y, and Top Cover [2](2) to take out the power assembly and
Wiring [51](51) referring to pages 8 to 12.
Fig. 27
[1](1)
[2](2)
[3](3)
[4](4)
[5](5)
[6](6)
[7](7)
[9](9)
[8](8)
[11](11)
[12](12)

Replacement of the piston ass'y

[15](15)
[18](18)
[10](10)
[19](19)
[20](20)
[26](26)
[25](25)
[23](23)
[24](24)
[21](21)
[22](22)
[31](31)
[30](30)
[13](13)
[14](14)
[13](13)
[16](16)
[17](17)
[60](60)
[29](29)
[27](27)
[28](28)
[34](34)
[35](35)
[68](68)
[33](33)
[32](32)
[36](36)
[69](69)
[37](37)
[38](38)
[39](39)
[40](40)
[41](41)
[42](42)
-23-
[61](61)
[64](81)
[63](63)
[65](82)
[67](67)
[18](18)
[66](66)