Section 13: Engine Assembly; Install Crankcase Cover - Generac Power Systems GTV99O Service Manual

SECTION 13: ENGINE ASSEMBLY
Figurc li-5. tnsta ing Canshaft
Figurc t3-4. Toryue Connec.ting Rods
5. Rotatecrankshafttworevolutionstocheckforbinding.
Rod
should also be free to movesideways on crankpin.
Repeat Steps 1-5 for #2 cylinder.
Note: The numbef 1 on *t .onnecting rod and the number
2 on *2 connecting rcd must be facing PTO side.
lmportant Failurc to use a torque wrcnch .an rcsuh in
loose conneding rod scrcws causing brcakage ot tight
conneding fod s.rews causing saoring,
INSTATT CAMSHAFT
Lubricate tappets, cam shaft joufnah and lobes with
eng ne o|].
1. Installtappets.
2. Aligntifting markson cam shaftand cfankshaft
gearand
installcam shaft, Figure 13 5.
3. Atsemble governor spool io governor shafi.
a. Make sure that spool engages flyweights.
b.Install new "O'Lring in crankcase.
INSTALL CRANKCASE COVER
Lubricate PTO and cam gear bearing.
1. Rotate governor shaftsothatthe piddle rests againstthe
cover, Figure l3-6.
Figute 13-5. Rotating covehot Shaft
2. lnstall crankcase cover with new gasket.
Note: fi the oil pump dfive is not aligned, the cover will
not slide completely on. Turning the uankshaft may
align the oil pump drive.
3. Install governor suppod bracket.
a. The allen head crankcase bolt willneed to be backed off.
4. Torque screws in sequenceshownto 47.5 Nm (35ft.lbs.),
Figure 13 7.
5. Check crankshaft end play. tf ess than 0.05mm (.002,,)
there may be an assembly probem.
'13-2