Crankcase Bearing Replacement; Seals - Polaris 1999 Sportsman 400 Service Manual

ENGINE LO W ER END
151
ing area under the too l with a shop cloth to avoi d
dam aging the cran kcase sea l mounting bore.
2. lnspect the engine case bearings and replace
damaged bearings before install ing new seals. Re-
fer to Crankcase Bearing Replacement
in this sec-
tion.
3. Pack hig h-tem perature grease between the lips
of each seal.
CAUTfON
The oil seal must be installed after the
crankcase has been assembled to pre-
vent damage to the sea/ lips.
4 . Asse mb le the crankcase as descri bed in this
cha pter.
5. Correc tly position the seal, as noted d uring re-
moval, ove r the crankshaft (F igure 50) a nd onto the
crankcase mounting bore.
6. P lac e a suitable size socket or bearing driver
over the sea l. Drive the seat into its mount ing bore
(F igure 51) until it is insta lled to the correc t dept h
as noted prior to rem oval.
Crankcase Bearin g
Replacement
When re mov ing the be arings , note and record the
direction of the beari ngs, the manufacturer's nam e
and
size
code . The
bearings
must be re installed in
the same direction .
Refer to Figure 48.
1.
If a bea ring ca me off with the cr anks haft, re-
move it
with a
bea ring sp litter and press as follows :
a. Mo unt a be ari ng splitter again st the main
bearing.
b. Place the co nnec ting rod at bottom de ad ce n-
ter (BDC) and insta ll the cra nkshaft ji g be-
II