um UXPW125 - Lubrication System Specifications; Lubrication System Troubleshooting

UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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3.2 Lubrication system (technical specifications)
Unit: mm
Item
Standard
Service Limit
Engine oil
Specification
SJ 10W/40
Capacity
when filter is not removed
1L
when filter is removed
1.1L
when engine is completely dry
1.2L
Oil pump
Backlash between outer rotor and pump body
0.28
Backlash between inner and outer rotors
0.20
Axial clearance between rotor and pump body
0.15
Requirements of tightening torque
Fastening bolt of oil pump: 10N.m
Screw on cover plate of oil pump: 3N.m
3.3 Troubleshooting
Name of
component
Type of damage
Symptom of
component
Symptom of
engine
Remedy
Oil pump
Excessive wear of inner and
outer rotors of oil pump
Oil is not
pumped freely
or no oil is
pumped.
Engine overheats
and is
insufficient in
power.
Replace the oil
pump.
Oil screen
Too much foreign matters on
it or clogged.
Clean the
screen
Oil filter
Too much foreign matters on
it or clogged.
Replace the oil
filter.
Lubrication
system
Clogged passage
Clean and
unblock the oil
path.