Hitachi NR90GC Service Manual - Page 32
Outside: O-ring groove, O-ring I.D. 66.27
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O-ring (I.D. 66.27) [36] Apply oil entirely. Oil application areas Mount Sleeve [9] Apply oil entirely. Cylinder Ass'y [42] Apply oil to the diagonally shaded areas. Inside Outside: O-ring groove Cylinder Head [14] Apply oil to the diagonally shaded areas. Outside: O-ring groove O-ring (I.D. 59.92) [15] Apply oil entirely. Piston Ring [38] Apply oil entirely. Chamber ass'y Apply oil to the diagonally shaded areas. Inside: O-ring sliding portions (2 places) Piston [39] Apply oil to the diagonally shaded areas. Outside: Piston ring groove Fig. 21 --- 29 ---
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--- 29 ---
O-ring (I.D. 66.27)
[36]
Apply oil entirely.
Oil application areas
Mount Sleeve
[9]
Apply oil entirely.
O-ring (I.D. 59.92)
[15]
Apply oil entirely.
Cylinder Head
[14]
Apply oil to the diagonally shaded
areas.
Outside: O-ring groove
Piston Ring
[38]
Apply oil entirely.
Chamber ass’y
Apply oil to the diagonally
shaded areas.
Inside: O-ring sliding portions
(2 places)
Fig. 21
Cylinder Ass’y
[42]
Apply oil to the diagonally
shaded areas.
Inside
Outside: O-ring groove
Piston
[39]
Apply oil to the diagonally
shaded areas.
Outside: Piston ring groove