Section 14: Specifications - Generac Power Systems GTV-990 Manual

DESCRIPTION
CYLINDER:
Bore
Out of Round
Main Bearing
Cam Bearing
CYLINDER HEAD:
Valve Guide
Valve Stem
CRANKCASE COVER:
Main Bearing
Cam Bearing
CRANKSHAFT:
Crankpin
Magneto Journal
PTO Journal
CAMSHAFT:
Magneto Journal
PTO Journal
Lobes
CONNECTING ROD:
Crankpin Bearing
Piston Pin Bearing
PISTON PIN:
Diameter
Out of Round
PISTON PIN BEARING (PISTON):
Bore
Out of Round
PISTON RINGS:
End Gap – Top & Center
End Gap – Oil
Ring Side Clearance – Top & Center
Ring Side Clearance – Oil
Armature Air Gap
Crankshaft End Play
Spark Plug Gap
Valve Clearance (Cold)
– Intake
– Exhaust
STANDARD AND REJECT DIMENSIONS
STANDARD DIMENSION
90.00 – 90.025 mm (3.543" – 3.544")
38.044 – 38.099 mm (1.498" – 1.5")
20.00 – 20.03mm (.787" – .789")
7.005 – 7.020 mm (.2758" – .2764")
6.945 – 6.98 mm (.2734" – .2748")
42.044 – 42.099 mm (1.6553" – 1.6574")
18.0 – 18.025 mm (.7087" – .7096")
38.99 – 39.01 mm (1.535" – 1.536")
38.00 – 38.012 mm (1.496" – 1.4965")
42.00 – 42.012 mm (1.6535" – 1.654")
19.959 – 19.98 mm (.7858" – .7866")
17.964 – 17.982 mm (.7072" – .708")
31.239 – 31.479 mm (1.2299" – 1.2393")
39.06 – 39.07 mm (1.5378" – 1.5382")
20.02 – 20.03 mm (.7882" – .7886")
19.984 – 19.995 mm (.7868" – .7872")
20.00 – 20.02 mm (.7874" – .7882")
0.25 – 0.5 mm (.0098" – .0197")
0.38 – 1.15 mm (.015" – .045")
0.04 – 0.09 mm (.0016" – .0035")
0.012 – 0.18 mm (.0005" – .007")
COMMON SPECIFICATIONS
14-1

SECTION 14: SPECIFICATIONS

REJECT DIMENSION
90.10 mm (3.547")
0.035 mm (.0015")
38.25 mm (1.506")
20.06 mm (.790")
7.06 mm (0.278")
6.9 mm (0.272")
42.25 mm (1.663")
18.06 mm (.711")
38.96 mm (1.534")
37.85 mm (1.490")
41.85 mm (1.648")
19.93 mm (.784")
17.93 mm (.705")
31.02 mm (1.221")
39.09 mm (1.539")
20.05 mm (.7894")
19.97 mm (.7862")
0.01 mm (.0005")
20.03 mm (.7886")
0.01 mm (.0005")
0.75 mm (.0295")
1.5 mm (.059")
0.10 mm (.004")
0.20 mm (.008")
.008" – .012" (0.20 – 0.30 mm)
.002" – .015" (0.05 – 0.40 mm)
.030" (0.76 mm)
.002" – .004" (0.05 – 0.1 mm)
.002" – .004" (0.05 – 0.1 mm)