Generac Power Systems 941-2 - Manual (Page 139)

Part 8
SPECIFICATIONS & CHARTS
Page 8-7
PISTON (CONTINUED)
MODEL GV-220
WRIST PIN BORE
DIAMETER:
DESIGN DIAMETER
0.708-0.709 inch
(18.000-18.011mm)
TOP RING GROOVE
WIDTH:
DESIGN WIDTH
0.059-0.061 inch
(1.52-1.54mm)
SECOND RING
GROOVE WIDTH:
DESIGN WIDTH
0.059-0.061 inch
(1.52-1.54mm)
OIL CONTROL RING
GROOVE WIDTH:
DESIGN WIDTH
0.118-0.119 inch
(3.01-3.03mm)
TOP RING WIDTH:
DESIGN WIDTH
0.057-0.059 inch
(1.47-1.49mm)
TOP RING END GAP: *
DESIGN END GAP
0.005-0.016 inch
(0.15-0.40mm)
SECOND RING WIDTH:
DESIGN WIDTH
0.057-0.059 inch
( 1.465-1.490mm)
SECOND RING END GAP: *
DESIGN END GAP
0.006-0.016 inch
(0.15-0.40mm)
OIL CONTROL RING
WIDTH:
DESIGN WIDTH
0.111-0.118 inch
(2.825-3.003mm)
OIL CONTROL RING
END GAP: *
DESIGN END GAP
0.015-0.055 inch
( 0.38-1.40mm)
*NOTE 1: Measure end gap with ring pushed down in cylinder to depth of 2.75 inches