3.48
ENGINE
9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
7. The Water Pump Install Kit (PN 5131135) is required
to install the new mechanical seal. This tool is
available separately and it is also included in the
Crankshaft / Water Pump Seal Installation Kit (PN
2871283)
One Way Valve Installation
Install the one way valve plunger, spring, and plug using a
new sealing washer.
Cam Chain Drive Sprocket Installation
1. Install the Woodruff key, drive sprocket (B), and
slotted nut (A). Tighten the nut to the specified
torque.
Tensioner Blade Installation
1. Install the tensioner blade and tighten the mounting
bolt to specified torque.
Piston Ring Installation
NOTE: Apply clean engine oil to all ring surfaces
and ring lands. Always check piston ring installed
gap before rings are installed on piston (see Page
3.29). If the piston has been in service clean any
accumulated carbon from the ring grooves and oil
control ring holes.
1. Place the oil control ring expander in oil ring groove
with the end gap facing forward. The expander has
no up or down marking and can be installed either
way. The ends should butt squarely together and
must not overlap.
2. Install the oil ring top rail.
NOTE: The top rail has a locating tab to prevent
rotation. The tab must be positioned in the notch on
the side of the piston as shown (C).
3. Install the bottom rail with the gap at least 30
o
from the
end of the expander on the side opposite the top rail
gap.
4. Install the second ring with the “R” mark facing up.
Position the end gap toward the rear (intake) side of
the piston.
One Way Valve Plug Torque:
16 ft. lbs. (22 Nm)
Slotted Nut Torque:
35-51 ft. lbs. (4.71-6.86 kg-m)
Tensioner Blade Mounting Bolt Torque:
6 ft. lbs. (8 Nm)
To Next Page
Loading...
