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9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
WALKER EVANS SHOCKS
GENERAL INFORMATION
SHOCK MAINTENANCE OVERVIEW
WARNING
When using compressed air to dry components, protective eye wear should be worn to avoid risk of injury.
Extreme caution should be observed while handling and working with high pressure service equipment. Wear safety
glasses, and ear protection during service of these shocks. Care should be observed while handling the inflater
needle and pressure gauges. Maintain your equipment and keep it in good working condition. If injury should occur,
consult a physician immediately.
Extreme cleanliness is of utmost importance during all disassembly and reassembly operations to prevent any dirt or
foreign particles from getting into the shocks. Keep the parts in order as they are disassembled. Note the direction
and position of all internal parts for reassembly.
Before servicing a gas shock it is important that all the gas pressure be discharged from the unit. Refer to the
instructions for the proper procedure of discharging the gas pressure from a shock. Protective eye wear should be
worn to avoid risk of injury while servicing gas charged shocks.
When removing the spring from a shock that utilizes a fixed lower retainer; the use of a proper spring compressor
should be used to avoid risk of bodily injury.
It is important that the gas shock be retained in the vise by the lower mount or appropriate shock body holding
clamps. Any other method of securing the chock body during these procedures may deform the shock body cylinder.
Point shock charge port away from face and body when charging or discharging any shock.
Changing shock oil is recommended annually and should be included when performing end of season storage
preparation. This oil change is necessary to avoid any chance of corrosion which could be caused by moisture
contamination.
When performing maintenance use Gas Shock Recharging Kit, PN 2200421. The kit consists of the necessary valves,
pressure gauge, and fittings to deflate and pressurize the shocks. The Body Holder Tool, Internal Floating Piston (IFP),
and Shock Rod Holding Tool are not included in the Recharging Kit and must be ordered separately.
STEERING / SUSPENSIONS
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