Table of Contents
Assembly, Cont.
ENGINE
EC25PF/EC28PF Engines
Correct crankshaft end play is .008" - .016" (.2 -
.4
mm). End play is adjusted by adding or subtracting spacer
washers from between the inner PTO end bearing and the crank wheel. Two different thickness spacers are avail-
able for EC 25 and EC28 engines:
For all EC25PF (except late 1998) - PN 3083629 - .008" (.2 mm); and PN 3083630 - .004" (.1 mm).
For late 1998 EC25PF and All EC28PF - PN 3084778
~
.008" (.2 mm); and PN 3084779 - .012" (.3 mm).
3.
Measure width of main bearing outer races with
bearings positioned as shown. Add the thickness of
the spacer between the bearings (if applicable).
Record measurement.
4.
Add all recorded measurements from Steps 1, 2,
and 3 and record the total on line A below. If PTO
bearings were assembled on crankshaft, record
the measurement from Step 1.
5.
Measure PTO crankcase half as shown to
determine depth of case. Place a piece of flat
stock on the case mating surface and measure
from this surface to the bearing seating surface.
Subtract thickness of flat stock and record the
measurement on line B below.
6.
Measure magneto side case half using the same
procedure. Record measurement on line C below.
(Remember to subtract thickness of flat stock.)
7.
Add the readings from steps 5 and 6 and record on
line D. Subtract line A from line D. The result is the
amount of crankshaft end play.
8.
If adjustment is required, determine the amount of
spacers needed to achieve proper end play.
Install spacers on crankshaft followed by PTO
bearings.
Connecting Rod Side Clearance
Total from Step 1,2, and 3.
(or from Step 1 only if PTO
1.
Measure
clearance
between
lower
rod
and
counterweight with a feeler gauge (connecting rod big
end side clearance). New measurement should be
between .016"-.020" (.4-.5 mm). Clearance should
not exceed
.036/1
(.9mm).
bearings were installed).
(A) _ _ _ _ _ _ _
Step 5 Result {B) _ _ _ _
Step 6 Result {C) _ _ _ _
Line B and Line C :::: (0)
Line
0
Line A = End Play
Polaris Industries Inc.
3.15
5/98
Table of Contents
Troubleshooting
