OIL PUMP AND BLANCER WEIGHT GEAR
5-41
EAS4D601
REMOVING THE BALANCER WEIGHT GEAR
AND OIL PUMP
1. Straighten the lock washer tab.
2. Remove:
●
Balancer weight gear nut
●
Lock washer
●
Balancer weight gear
NOTE:
Place the aluminum plate “a” between balancer
drive gear “1” and balancer weight gear “2”, and
then loosen the balancer weight gear nut “3”.
3. Remove:
●
Oil pump assembly
EAS24960
CHECKING THE OIL PUMP
1. Check:
●
Oil pump driven gear
●
Oil pump housing
●
Oil pump cover
Cracks/damage/wear
→
Replace the defec-
tive part(s).
2. Measure:
●
Inner-rotor-to-outer-rotor-tip clearance “a”
●
Outer-rotor-to-oil-pump-housing clearance
“b”
●
Oil-pump-housing-to-inner-rotor-and-out-
er-rotor clearance “c”
Out of specification
→
Replace the oil pump.
3. Check:
●
Oil pump operation
Rough movement
→
Repeat steps (1) and
(2) or replace the defective part(s).
EAS4D602
CHECKING THE BALANCER WEIGHT GEAR
1. Check:
●
Balancer weight gear
●
Buffer boss
●
Compression spring
●
Dowel pin
Cracks/damage/wear
→
Replace.
1
2
3
a
Inner-rotor-to-outer-rotor-tip clear-
ance
0.150 mm (0.0059 in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.010
–
0.034 mm (0.0004
–
0.0013
in)
Limit
0.050 mm (0.0020 in)
Oil-pump-housing-to-in-
ner-and-outer-rotor clearance
0.04
–
0.09 mm (0.0016
–
0.0035 in)
Limit
0.15 mm (0.0059 in)
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Summary of Contents for XG250
Page 1: ...SERVICE MANUAL XG250 4D6 28197 E0 ...
Page 39: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 23 LUBRICATION DIAGRAMS ...
Page 41: ...CABLE ROUTING 2 25 CABLE ROUTING ...
Page 43: ...CABLE ROUTING 2 27 ...
Page 45: ...CABLE ROUTING 2 29 ...
Page 47: ...CABLE ROUTING 2 31 ...
Page 49: ...CABLE ROUTING 2 33 ...
Page 217: ...CARBURETOR 6 8 ...
Page 218: ...AIR INDUCTION SYSTEM 6 9 EAS27040 AIR INDUCTION SYSTEM ...
Page 222: ...AIR INDUCTION SYSTEM 6 13 ...
Page 237: ...CHARGING SYSTEM 7 14 ...
Page 241: ...LIGHTING SYSTEM 7 18 ...
Page 247: ...SIGNALING SYSTEM 7 24 ...
Page 251: ...CARBURETOR HEATING SYSTEM 7 28 ...
Page 252: ...ELECTRICAL COMPONENTS 7 29 EAS27970 ELECTRICAL COMPONENTS 1 2 3 4 5 6 8 7 9 ...