Piston Pin And Piston-Pin Bore; Connecting·rod Small End; Crankshaft Runout - Arctic Cat 1987 AFS El Tigre Service Manual

PISTON PIN AND PISTON·PIN BORE
1.
Measure the piston pin diameter in several
places. If any measurement varies by more
than 0.02 mm (0.001 in.), the piston pin and
bearing must be replaced as a set.
Fig. 2·68
A674
PISTON PIN DIAM ETER RANGE
mm
I
in.
17.995-18.000
I
0.7085-0.7087
2. Insert a snap gauge into each piston-pin bore;
then remove the gauge and measure it with a
micrometer. Diameter must be within specifi -
cat ions. Take two measurements to ensure
accuracy.
Fig. 2-69
A676
PISTON· PIN BORE DIAMETER RANGE
mm
in.
530 UC 18.002-18.010 0.7087-0.7091
500 FIC 17.998-18 .006 0.7086-0.7089
'40 WC 17.998-18.006
0.7086-0.7089
CONNECTING·ROD SMALL END
1. Insert a snap gauge into each c onnec ting-rod
small end bore; then remove the gauge and
measure it with a micrometer. Diameter must
be within specific ations.
Fig. 2·70
CONNECTING-ROD SMALL END DIAMETER RANGE
mm
I
in.
23.00-23.01
I
0.9056-0.9059
CRANKSHAFT RUNOUT
1. Using a set of V-blocks, s upport the
crankshaft on a surface plate.
II NOTE: The V·blocks should support. the
crankshaft on the outer bearings.
2. Mount a dial indicator and base on the sur-
face plate . Position the indicator contact
point against the crankshaft distance A (PTO
end) from the crankshaft counterweight. Zero
the indicator and rotate the crankshaft slow-
ly. Note the amount of crankshaft runout
(total indicator reading).
500 FIC
mm
in.
A
41.3 1.62
B 41.3 1.62
530-440 UC
mm
in.
A
44.5 1.75
B 44.5 1.75
3. Position the indicator contact pOint against
the crankshaft distance B (MAG end) from the
crankshaft counterweight. Zero the indicator
and rotate the crankshaft s lowly. Note the
amount of c rankshaft runout (total indicator
read in g).
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