Benelli ZAFFERAN 250, Service Manual

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9. Lubricating System
Preparing documents--------9.1
Failure diagnosis-------------9.2
Oil pump-------------------------9.3
9.1 Preparing Documents
Note of Work
After the oil pump is disassembled, carefully clean each part and its surface with high flash
point contact cleaner. When the oil pump is disassembled, do not allow any impurities to fall
into the crankcase.
Function of the lubricating system:
the lubricating system of the engine is to provide
lubricating oil to the frictional surface of each part, which transforms dry friction into liquid friction
between lubricating oil particles and also reduces abrasion of the parts. It also cools
components with high thermal load, absorbs shock from bearings and other parts, reduces
noise, increases sealing between the piston rings and the cylinder wall, and cleans and removes
particles in the surface.
Basic item standard and use limit
Item Standard Limit for use
Fuel capacity
when replacing fuel
1.4L /
when disassembly
1.5L /
Oil pump rotor
radial clearance
between inner and
outer rotors
0.04
－
0.11
0.17
clearance between
outer rotor and pump
body
0.11-0.176 0.23
clearance between
rotor surface
0.02-0.07 0.11
Gear oil capacity
in the gearbox
when replacing fuel
0.4L /
when disassembly
0.4L /
9.2 Failure diagnosis
Decreasing fuel Burnt engine
Natural consumption of fuel No fuel or low fuel pressure
Fuel leakage Blocked fuel pipes
Abrasive or incorrectly installed piston ring No fuel used