Gilera GP 800 i.e. - General Characteristics

Specification Desc./Quantity
5 REAR PISTON LUBRICATION JET
6 STARTING RING GEAR BUSHING LUBRICA-
TION
7 CRANKSHAFT BUSHINGS
8 WATER PUMP CONTROL DRIVING GEAR
SHAFT LUBRICATION
9 WATER PUMP SHAFT LUBRICATION
10 MINIMUM OIL PRESSURE SENSOR
11 NON-RETURN VALVE
12 OIL CARTRIDGE FILTER
13 POMPA MANDATA OLIO
14 BY-PASS VALVE
15 POZZETTO OLIO
16 SCAVENGE OIL PUMP:
17 SUCTION ROSE
18 OIL DRAINAGE PLUG
19 OIL RESERVOIR
20 OIL RESERVOIR FILTER
21 OIL PASSAGE FROM HUB TO RESERVOIR
The RED arrows indicate the oil pressure circuit.
The BLUE arrows indicate the oil scavenge circuit.
General characteristics
The lubrication system is divided into two sections:
- high pressure
- low pressure
The high pressure section includes all components located on the engine crankcase whereas the low
pressure section only refers to the thermal group.
The trochoidal pump is fitted into the sump and controlled by the chain.
To guarantee the integrity of the pump, a pre-filter is fitted.
Pump delivery is controlled by means of a piston-type by-pass calibrated to 4.5 bar. This valve is located
upline the cartridge filter.
The by-pass located before the cartridge filter improves the operating conditions for the filter, particularly
with cold oil.
The filter is equipped with an anti-drain back valve and a pressure relief valve; the latter intervenes
when the filtering mass causes a pressure drop above 1 ± 0.2 bar.
These conditions naturally occur only with cold oil and at high engine revs or if the filter is clogged.
The filtered oil is used to lubricate the water pump shaft and the driving gear shaft, to lubricate the main
bearings, the connecting rod head and the piston cooling nozzle, on the transmission-side bearing.
The main bearing on the transmission side is fitted with an oil seal and the respective drain line.
The supply line for the timing system comes from the flywheel-side bearing; delivery to the head is
controlled by the specific jet screwed on the engine crankcase; the supply line for the timing system to
the rear cylinder comes from the transmission-side bearing.
GP 800 i.e. Engine
ENG - 83