Connecting Rod Inspection - Arctic Cat Cougar Service Manual

174
Connecting Rod Inspection
NOTE
To replace the connecting rods, the
crankshaft must be pressed apart, then
pressed together and aligned using pre-
cision holding, measuring and pressing
equipment. These special tools and tech-
nicians trained and experienced at re-
building the crankshaft assembly are not
available at most service shops. The
manufacturer recommends replacement
of the connecting rods and crankshaft
if
any part other than the outer seals or the
main bearings at the ends of the crank-
shaft require replacement. Parts for the
crankshaft may also not be available.
If
the condition of the connecting rods or
the crankshaft are questioned, the as-
sembly should be inspected by a compe-
tent dealer familiar with crankshaft
repair.
CHAPTER FIVE
5. While performing the connecting rod check
in Step 4, the crankshaft main bearings should
also tum smoothly. The outer bearings can be
removed and replaced without disassembling the
crankshaft.
®
1. Wipe the piston pin bore in the connecting rod
f58\
with a clean rag and check it for galling,
~
scratches, or any other signs of wear or damage.
If any of these conditions exist, replace the con-
necting rods as described in this chapter.
2. Measure the inside diameter of the piston pin
bore in the connecting rod (Figure 58) at several
locations. If any measurement is not within the
specifications listed in Tables 2-9, the crankshaft
will have to be rebuilt and a new connecting rod
installed.
3. Check the connecting rod big end axial play.
You can make a quick check by simply rocking
the connecting rod back and forth (Figure 59}.
If there is more than a very slight rocking motion
(some side-to-side sliding is normal), you should
have an Arctic Cat dealer check the crankshaft
further to see if it is satisfactory for further use.
4. Rotate the crankshaft and check the smooth-
ness of the connecting rod as it moves around the
crankpin. If the connecting rod catches, or ratch-
ets, as the crankshaft is rotated, you should have
an Arctic Cat dealer check the crankshaft further
to see if it is satisfactory for further use.