Piston Removal - Polaris 850 PRO-RMK 155 2020 Manual

ENGINE / COOLING / EXHAUST

PISTON REMOVAL

1. Remove the cylinder head. See Cylinder Head
Removal page 3.73.
2. Remove the cylinder. See Cylinder Removal page
3.75.
3. Remove piston circlips
NOTICE
A small screwdriver may be used to aid in circlip
removal. Gently pry out the hook portion of the circlip
carefully remove. Only the outer circlip needs to be
removed for piston removal.
w
4. Push piston pin out of piston. If necessary, heat the
crown of the piston slightly with a heat gun if pin
cannot be removed by hand.
IMPORTANT
Do not apply heat to the piston ring. The ring may lose
radial tension.
3.78
q
. Discard circlips.
If needed, the piston can also be removed using a
Piston Puller and the correct Pin Puller Adapter.
5. Remove the piston from the connecting rod.
6. Carefully remove top compression ring
using a ring removal pliers.
• Piston ring pliers: Carefully expand ring and lift it
off the piston.
• By hand: Placing both thumbs on the ring ends,
spread the ring open and push up on opposite side.
Do not scratch ring lands.
Do not expand the ring more than the amount
necessary to remove it from the piston, or the ring may
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
Piston Pin Puller:
PU-45255
Pin Puller Adapter:
PS-47055
e
IMPORTANT
break.
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by hand or