Generac Power Systems OHVI GSH 190, Service Manual

Page: 60 / 72

14-4
SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS
CAMSHAFT ASSeMblY
Model GN-190 GN-191 GN/GSH-220
MAIN CAMSHAFT BEARING
DIAMETER (FLYWHEEL END): .022-.02 inch
(25.96-25.98mm)
.022-.02 inch
(25.96-25.98mm)
.022-.02 inch
(25.96-25.98mm)
MAIN CAMSHAFT BEARING
DIAMETER (PTO END): .022-.02 inch
(25.96-25.98mm)
.297-.298 inch
(2.96-2.98mm)
.297-.298 inch
(2.96-2.98mm)
CAM LIFT
0.20-0.22 inch
(5.-5.8mm)
0.20-0.22 inch
(5.-5.8mm)
0.20-0.22 inch
(5.-5.8mm)
BASE CIRCLE DIAMETER OF
CAM: 0.978-0.990 inch
(2.85-25.5mm)
0.978-0.990 inch
(2.85-25.5mm)
0.978-0.990 inch
(2.85-25.5mm)
COMPRESSION RELEASE LIFT
(MEASURED AT TAPPET): 0.09-0.026 inch
(0.95-.665mm)
0.09-0.026 inch
(0.95-.665mm)
0.09-0.026 inch
(0.95-.665mm)
oIl PuMP
Model GN-190 GN-191 GN/GSH-220
PUMP TIP CLEARANCE *:
0.0000-0.000 inch
(0.000-0.025mm)
0.0000-0.000 inch
(0.000-0.025mm)
0.0000-0.000 inch
(0.000-0.025mm)
INNER ROTOR BORE:
0.5-0.55 inch
(9.000-9.09mm)
0.5-0.55 inch
(9.000-9.09mm)
0.5-0.55 inch
(9.000-9.09mm)
INNER ROTOR THICKNESS:
0.2-0.5 inch
(7.95-8.00mm)
0.2-0.5 inch
(7.95-8.00mm)
0.2-0.5 inch
(7.95-8.00mm)
INNER ROTOR SHAFT
OUTSIDE DIAMETER: 0.5-0.5 inch
(8.969-8.987mm)
0.5-0.5 inch
(8.969-8.987mm)
0.5-0.5 inch
(8.969-8.987mm)
OUTER ROTOR SHAFT
OUTSIDE DIAMETER: .296-.297 inch
(2.92-2.95mm)
.296-.297 inch
(2.92-2.95mm)
.296-.297 inch
(2.92-2.95mm)
OUTER ROTOR THICKNESS
0.-0.6 inch
(8.000-8.025mm)
0.-0.6 inch
(8.000-8.025mm)
0.-0.6 inch
(8.000-8.025mm)
OIL PRESSURE RELIEF VALVE
SPRING: Force required to
compress spring to
.05 inch (26.mm)
0.85-0.95 pounds
(0.9-0.kg)
0.85-0.95 pounds
(0.9-0.kg)
0.85-0.95 pounds
(0.9-0.kg)
*NOTE 2: Measure pump tip clearance with rotor on shaft in crankcase cover.
0C1103Arev0.indd 4 6/22/2006 10:51:56 AM