Derbi Rambla 250, Manual, Page: 190 / 259

INSERT THE BEARINGS. DO NOT HIT THE BALLS AND/OR
THE INTERNAL RING. MAKE SURE THE FOLLOWING
COMPONENTS ARE FITTED PERFECTLY IN:
•
THE LEFT BEARING «4» ON THE HUB;
•
THE SPACER «5» ON THE LEFT BEARING
«4»;
•
THE RIGHT BEARING «2» ON THE SPACER
«5»;
Front wheel hub overhaul
BEARINGS
Manually rotate the internal ring «
1
» which must
turn smoothly, without obstacles and/or noise.
There must be no axial clearance. The bearings
presenting these problems must be replaced.
CAUTION
CHECK THAT ALL THE PARTS ARE IN GOOD CONDI-
TIONS, SPECIALLY THE ONES BELOW.
GASKETS
Check that the gaskets are in good conditions; replace them if they show signs of damage or excessive
wear.
WHEEL PIN
Using a dial gauge, check the wheel pin «
2
» ec-
centricity. Replace the pin «
2
» if the eccentricity
exceeds the limit value.
Characteristic
Maximum eccentricity:
0.25 mm
RIM
Using a dial gauge, check that the radial eccen-
tricity «
A
» and the axial eccentricity «
B
» of the rim
«
3
» do not exceed the limit value.
An excessive eccentricity is usually caused by
worn or damaged bearings.
Replace the rim «
3
» if, after the bearings are re-
placed, the value is not within the specified limit.
Characteristic
Maximum radial and axial eccentricity:
2 mm
Suspensions
SUSP - 190