Camshaft Chain And Sprockets Installation; Camshaft Chain Wear - Polaris 1999 Sportsman 400 Service Manual

ENG INE TOP END
133
I
t
B
t
A
@)
CAMSHAFT CHAIN WEAR
@)
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1st - -
0
2nd
r
0 3rd
0
4th
lnstal latlo u
I. Install the Woodruff key (Figure
154 )
into the
slot in the cranksha ft. Ma ke sure
it
is seated cor-
rectl y and is not cock ed.
2. Position the drive sproc ket w ith the sprocket teeth
side going on last. Slide the dr ive sprocket (F igure
153)
onto the crankshaft and inde x ill onto the Wood-
ruff key, Push the drive sprocket on until it botto ms.
"
'I
o
Length
0 '
~:::urrnljl
. aom- -
43
Pi~BUShing
Pin link
c
Roller lin Roll er
damage (Fig ure 159) . If one of the sproc kets is
worn or da mage d, replace both sproc kets
<IS
we ll as
the chain. A damaged sproc ket can quickl y damage
a new chain.
CAUTION
The slotted nut has hi t-hand threads.
Turn the special wrench
('0 11
nter-
clockwise
10 l ig hten
the
nut.
6. Inspect the slotted nut (ll , Fig ure
157)
for thr ead
damage. Replace
if
necessary.
7. Chec k the Woodru ITkey and the cranks ha ft key
slo t for wea r or da mage. Replace the Woodruff key
if
necessary.
8. Check the Woodruff key s lo t
III
the drive
sprocket to r \\'eur or da mage.
9 . Inspeetthe rear tensioner slider ( Fig u re
160)
for
wear or damage. Replace
if
necessary.
3. lnsta ll the slotted nut (Figure
152)
onto the
crankshaft and tighten fin ger tight mak ing sure the
drive sproc ket is properly seated on the Woodruff
key and the cra nks haft .
4 . Install the spec ial tool (Figure 15 1) onto the
slo tted nut. Press hard
011
the tool to engage the tool
tab s into the nut slots. Turn the special tool co unter-
clo ckwise and tighten to the torqu e spe ci ficatio n
listed in Table 3 . Rem o ve the specia l too l.
5. Install the washer and
nut (C,
Figure 150) onto the
end ofthe crankshaft, Tighten finger tight atthis time.