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Generac Power Systems GTV-990 User Manual

Generac Power Systems GTV-990
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SECTION CONTENTS
PAGE
CHECK CRANKSHAFT .................................................. 11-1
CHECK CAMSHAFT .................................................... 11-1
CHECK CRANKSHAFT:
Inspect crankshaft threads, keyways and timing gear for
damage or wear. If threads, keyways or timing gear are dam-
aged or worn, replace crankshaft. Check journals for scoring.
If journals are scored, replace crankshaft. Check journals for
wear. See crankshaft reject sizes.
Crankshaft Reject Sizes
Model PTO Mag. Crankpin
Series Journal Journal Journal
ALL 41.85 mm 37.85 mm 38.96 mm
(1.648") (1.490") (1.534")
Figure 11-1. Check Crankshaft
CHECK CAMSHAFT
:
Inspect gear teeth, lobes and journals for wear and nicks,
Figure 11-2. Camshaft journal and lobe reject sizes are shown
below. Replace cam gear if not to specification.
Camshaft Reject Size
PTO Mag Intake Exhaust
Journal Journal Lobes lobes
17.93 mm 19.93 mm 31.02 mm 31.02 mm
(0.705”) (0.784") (1.221")
(1.221")
Figure 11-2. Check Camshaft
MAG
JOURNAL
INTAKE
LOBES
EXHAUST
LOBES
PTO
JOURNAL
FLYWHEEL
KEY
OIL
GALLERY
OIL
GALLERIES
CRANKPIN
PTO
JOURNAL
MAG
JOURNAL
TIMING
GEAR
SECTION 11: CRANKSHAFT & CAMSHAFT
11-1

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Generac Power Systems GTV-990 Specifications

General IconGeneral
BrandGenerac Power Systems
ModelGTV-990
CategoryEngine
LanguageEnglish

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