Section Contents - Generac Power Systems GTV99O Service Manual

SECflON 8i LUBRICATION SYSTEM
SECTION CONTENTS
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c H A N G T N G T H E E N G T N E O T L A N O
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DESCRIPIION
The Generac GTV 990t60 OHV|Vtwins use a ful pressure
lubrlcation system with an orlfilter The qerotorrype oitpump
draws oilfrom a screened oil pickup in the sump and pumps
the oilth.ough the oilfilter
The filtered oilfows through an oi gattey in the sump and
is d stributed to the maln bearings, connecting rod bearings
and camshaft bearings Engine oil pressure wilt vary with oi
vrscosity, ambient air temperature diff erences, operatlng tem-
peratures and engine load. Followthe oil recorlr me' rodron on
paqe 8 2 of this secton.
Oil Pressure-@70.F(21 "C):
15 - 50 psi {1.0 - 3.5 Bar)
A pressure reliefvalve limitsthe maximum oilpressure inthe
system.
PROT€crION
SYSTEMs
LOW PRESSURE SW]ICH:
The engine is equipped wrth a low oil pressure sensor that
closesthe circuit between the termina ls when the oi pressure
drops below 8 psi. lf one term nalisconnecled tothe igniton
kill wire and the other termina is conneced to ground, the
engine willshLtdown on low oilpressure.ll
the engineshuts
down by itself and the fLrel tank has enough gasoline, check
the engine oil level.
A delay bLrlr inro tl_e \l-Jroowr syste- o. so-e engile
applications
allows oilprcssureto buid duing stading. The delay
allows lhe engire lo J,lro.aboLl I0 econds befo.e sensr g
oil pressure. f thesystem senses owoil pressure du.ing oper-
aton, the engine rhutsdown. The eng newil not continueto
run unti 8 psi of oil pressure s reached. lf you try to renart
the engine within (five) 5 s€conds after iishub down, lhe engin€
may NOTstart. The system n€eds 10 seconds to reser.
NOIE: lf you reshft engine after a thutdown and have
not coteded the low oil prcssurc, the enghte may .un
for about 10 seconds as described above, and then it wil!
H GH TEI,4PERATURE
SWITCH
(OPTONAL):
This switchS (not shown)contacls close if the temperature
shoud exceed approximately 1400 C (2840 F), initating an
engrne shutdown. n cedain applications, the equlpment will
automatcally restaft and the LED will rcset once the temper
ature has rcturned to a safe operating level.
Figurc 8-1. Engine Protedive Devices
CHECKING THE ENGINE OIL LEVEL
Th€ o lcapacityofthe GTV-990,60 OHVtengine
ts approx_
rmatey 2 quads. To check the engine oit levet, proceed as
I
Remove the dipstlck and wipe it dry with a
clean cloth.
2. Inndllth€ dipstck comptetety; then remove it again The
oillevelshould
beatth€ dtpstick,'Fult,
ma*. tf necessary
add oil untlthe "Full" mark is reach€d DO NOT F|LL
ABOVE THE "FULL" MARK
Never operatethe enginewith th€ oit tev€l betow the
"Add" mark on the dipstirk. Doingthh coutd damage
the €ngine.
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