Rocker Arm - Polaris 1999 Sportsman 400 Service Manual

ENGINE TOI' EN!) 101
Installation
I. Coat the cam lobes and cam follower surfaces
with molybdenum disulfid e grease before installing
the rocker arm assembly. Coat the mountin g bolt
thread s with a light film of engine oil.
NOTE
lf
the
ca/l1sl11~/i
hus turned jiYJ11l
top
dead
center
Ofl
the compression stro ke.
repeat Step 5 in Removal
to
return the
engine to
TDC
all
the
compression
stroke.
2. If removed, install the locating dowels (Figure
24) into the cy linder head .
3. Correct ly position the rocker arm assem bly and
install the rocker ann assembly onto the locating
dowels and the cy linder head . Push the assembly
down until it is flush with the mating surface of the
cylinder head.
4. Install the four support bolts (Figure 23) and
tighten in a crisscross pattern to the torque value
listed in Table 3.
5. If loosen ed or removed , tighten the rocker shaft
retaining screw (F igu re 22) securely.
6. Adjust valve cleara nce as described in Chapter
Three.
7. Clean the gaske t surfaces of the cylinder head
and cove r. then install a new gasket (Figure 18) on
the cy linder head cover.
8. Install the cylinder head cover as described in
this chapter,
9. Install the plug into the timing inspection hole
and tighten sec urely.
10. Install the spark plug as described in Chapter
Three.
II. Connect the negativ e battery cable .
v
Rocker Arm
f)
lsassem hly/ln spectionl Assern bly
I. Remove the rocker arm assem bly as describ ed in
this chapter.
2. Separate the bracket, rocker arms and shaft (Fig-
ure 25).
3. Thorou ghly clean all parts in solvent and dry
with com pressed air.
4. Make sure the rocker ann oil holes arc clear
(Figure 26 ). Clean o ut
if
necessary.