Polaris 1999 Sportsman 400 Service Manual page 173

ENG INE LOW E R END
16 7
II
(/ =
(b
+
c) - (il
+
e)
a
=
the new shim th ickness.
b
=
the di stance reco rded in Step 5.
c
=
the distance recorded in Step 6.
d
=
th e w id th of the balanc er shaft (Step 3) .
e
=
the specified end play in Tah le 2.
Oil pump shaft end play
I. Mak e ce rtain the o il pu mp shaft bearing (F igu r e
119) is fully seated in the right s ide crankcase hai r.
2. Measure the thickne ss of the straightedge as
show n in Figure 112. Th is d imen sion will be used
in the fo llow ing steps.
3. Position a stra ightedge ac ros s the sealing s urface
o f the right s ide
crankcase hal f.
4 . Using a d ia l ve rn ier caliper or de pth ga uge, care-
full y measure the d istance from the top o f the
stra ightedg e to the left s ide oi l pu mp sha ft bearing
(Fig ure 120 ). Note the di mens io n a nd su btrac t the
thi ck ness of the straightedge in Step 2. Record thi s
measurement .
5. Using a dial vernier caliper or depth gauge. care-
fully measure the d istan ce from the top o r the
stra ightedge to the o il pu mp mou nt ing su rface ( Flg-
ure 121) in the righ t side crankca se . Note the d i-
men sion and sub trac t the th ickn ess of the
straightedge in
Step
2. Record this measurement.
6. With the o il pu mp rem o ved from the crankcase,
install the oi l pu mp dr ive ge ar onto the oil pump
drive. Us ing a
dial
vern ier caliper, m easure the
th ickness from the mati ng surface o f the o il pu mp to
the to p ma ch ined surfac e o f the gear whe re the shim
is located (Figu r e 122) . Reco rd this mea surem ent.
7. T he spec ified o il pump end play is listed in Ta-
ble 2. Use the foll owin g equation to select the co r-
reel
s him thickness to o bta in the specifi ed end play.