5-158 MISCELLANEOUS CONTROLS AND OPTIONS
Troubleshooting
(1) Much vibration
Cause: Loose compression mounting bolts
(2) Abnormal noise(Noise is generated mainly from the circumference of the cylinder or
case.)
1) Cause: Loose connection between rotor and driving arm
In this case, the driving arm is loosened and causes the valve base to be in contact with the
rotor, generating a great noise.
Correction: Loosen the driving arm from the rotor, and clean the inside surface of the hole
and external surface of the shaft as if removing oil, insert the arm again, and then tighten
swivel nuts.
2) Cause: Damaged connecting rod(small end metal) or piston pin
Correction: Unscrew and remove the connecting rod from the crankshaft and replace the
metal and piston pin. Remove oil completely from the inside of crankcase and add new oil.
3) Cause: Damaged connecting rod
Correction: Oil being supplied will not damage the connecting rod. Therefore, causes for
damage are as follows:
•
Restricted oil filter obstructing oil flow.
•
Restricted tube for the oil injection port
•
Air existing in the tube for the oil injection port
4) Cause: Damaged taper roller of crankshaft
Correction: Replace both outer and inner races with a new set and change the oil in the
crankcase with new oil
5) Cause: Loose axial direction of the taper roll bearings for the crankshaft
6) Cause: Rotor in contact with other parts inside the cylinder
7) Cause: Damaged needle bearing of the rotor
Correction: Check and see if both outer and inner races are in contact with other parts before
replacing them, then insert a new outer race. At this time it is desirable to replace the inner
race also.
8) Cause: Damaged single low deep ball bearing at the end of the rotor
Correction: As grease has been consumed, replace the bearing together with the oil seal. As
each of the rotor and side wall is in contact with other parts, inspect their surface cautiously.
Otherwise, damage will result.
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Summary of Contents for Novus F3CBF
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