Generac Power Systems GTH1000, Руководство по обслуживанию

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DESCRIPTION
The Generac GTH/GTV-760/990 OHVI V-twins use a full pressure lubri-
cation system with an oil filter. The gerotor type oil pump draws oil from
a screened oil pickup in the sump and pumps oil through the oil filter.
The filtered oil flows through an oil gallery in the sump and is distributed
to the main bearings, connecting rod bearings and camshaft bearings.
Engine oil pressure will vary with oil viscosity, ambient air temperature
differences, operating temperatures and engine load. Follow the oil
recommendation on page 8-2 of this section.
Oil Pressure - @ 70° F (21 ° C):
15 - 50 psi (1.0 - 3.5 Bar)
Two pressure relief valves limit the maximum oil pressure in the system
to 60 and 40 psi respectively.
PROTECTION SYSTEMS
LOW OIL PRESSURE SWITCH:
The engine is usually equipped with a normally open type, low oil
pressure switch that closes the circuit between the terminals when
the oil pressure drops below 8 psi. If one terminal is connected to the
ignition ground wire and the other terminal is connected to ground,
the engine will shut down on low oil pressure. The switch can also be
connected to an alarm or light to indicate low oil pressure, instead of
shutting down the engine.
Note: Some engine models have a normally closed type switch and
will work the opposite as above.
A delay built into the shutdown system on some engine applications
allows oil pressure to build during starting. The delay allows the engine
to run for about 10 seconds before sensing oil pressure. If the engine
is wired for low oil pressure shutdown and the system senses low oil
pressure during operation, the engine shuts down. The engine will not
continue to run until 8 psi of oil pressure is reached. If you try to restart
the engine within (five) 5 seconds after it shuts down, the engine may
NOT start. The system needs 10 seconds to reset.
OIL
PRESSURE
SWITCH
OIL FILTER
Figure 8-1. Engine Protective Devices
CHECKING THE ENGINE OIL LEVEL
The oil capacity of the GTH/GTV-760/990 OHVI engine is approximately
2 quarts. Refer to the chart on Page 14-1 for the proper amount for
each model. To check the engine oil level, proceed as follows:
1. Remove the dipstick and wipe it dr y with a
clean cloth.
2. Install the dipstick completely; then remove it again. The oil level
should be at the “Full” mark. If necessary, add oil until the “Full”
mark is reached. DO NOT FILL ABOVE THE “FULL” MARK.
*
Never operate the engine with the oil level below the “Add”
mark on the dipstick. Doing this could damage the engine.
FILL / CHECK
Figure 8-2. Location of Oil Fill/Check (Vertical Shaft)
SECTION 8: LUBRICATION SYSTEM
8-1
8