Specifications

3
24
ASSEMBLING AND TESTING THE ENGINE
Verifying alignment and torque of each half-shaft.
Before reassembling the engine you must perform a
number of fundamental tests to guarantee that the
engine functions properly.
Hereunder are the main steps and checks.
Before reassembling the parts, grease the oil seals
and oil all the bearings.
1
2 2
A
ASSEMBLING AND TESTING THE ENGINE
TESTING THE MOTOR SHAFT AND
CONNECTING ROD
Firstly verify the wear-and-tear state of the
coupled surfaces.
Test the misalignment of the axes of the half-
shafts by placing the motor shaft between
two tailstocks or similar tools and verify the
maximum variation in one revolution by me-
ans of comparators 1 being placed on the
coupled surfaces with the main bearings 2.
Limit value allowed: 0.08 mm.
Should a difference be noticed in the rea-
dings of the two half-shafts, this will be due
to the torque of the shaft itself.
Limit value allowed in the difference:
0.03 mm.
Moreover, verify any axial loosening betwe-
en the head of the connecting rod and the
internal part of the half-shafts.
Recommended loosening: 0.39 to 0.72 mm.
Verify distance A between the two exter-
nal surfaces of the half-shafts that must be
62 mm: +0.05 to -0.15 mm.
3.1