Oil Application Areas - Hitachi NR90GC - 3-1/2" Gas Powered Clipped Head Framing Nailer Technical Data And Service Manual

O-ring (I.D. 66.27) [36]
Apply oil entirely.
Cylinder Ass'y [42]
Apply oil to the diagonally
shaded areas.
Inside
Outside: O-ring groove

Oil application areas

Mount Sleeve [9]
Apply oil entirely.
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.
Piston [39]
Apply oil to the diagonally
shaded areas.
Outside: Piston ring groove
Fig. 21
--- 29 ---
Chamber ass'y
Apply oil to the diagonally
shaded areas.
Inside: O-ring sliding portions
(2 places)