Snowmobile Arctic Cat (2008 year). Manual - part 147

7-148

FS152

„NOTE: For ease in removing the piston, use the
inflation needle to help vent the shock body.

FS153

14. Clean and inspect all components.

ASSEMBLING/CHARGING

1. Lubricate the O-ring and wiper on the floating pis-

ton with shock oil.

FS154

2. Carefully install the floating piston into the shock

body until it is below the threads.

FS155

3. Using Floating Piston Installation/Location Tool,

install the floating piston while using the inflation

needle to vent the shock body.

„NOTE: Refer to the Rebuildable Shock Specifi-
cations sub-section in Section 1.

FS156

4. Using standard Arctic Cat Shock Oil, fill the shock

body to the bottom of the threads; then, allow to sit

1-2 minutes to ensure no air is in the oil.

FS157

5. Lubricate the O-ring on the underside of the end

cap with shock oil.

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7

FS158

6. Lower the shock rod into the shock body until the

piston is submerged in oil.

FS159

7. While keeping the shock rod fully extended,

thread the bearing cap into position.

FS160

8. Using Spanner Wrench, tighten the bearing cap.

FS161

„NOTE: When tightening the bearing cap, note
air and excess oil being bled from the hole in the
cap.

FS150A

9. Install the check ball and set screw into the bearing

cap.

FS162

FS163

10. Charge the shock with nitrogen to 200 psi.

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FS164

11. Using a 3/16-in. Allen-wrench, tighten the

nitrogen bladder.

FS165

12. Install the nylon pellet by gently tapping it with a

plastic mallet.

FS166

13. Test the shock for proper operation.

14. Using compressed air, blow all oil from the holes

in the bearing cap.

FS167

15. Lubricate the seal on the air chamber with Fox

Float Fluid.

FS168

16. Slide the air chamber onto the shock body.

FS169

17. Add 1 cc of Fox Float Fluid into the chamber.

FS170

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18. Thread the air chamber into the end cap until

hand-tight.

FS171

„NOTE: Prior to installing the air chamber, make
sure the end cap O-ring is properly positioned in
the chamber.

19. Invert the shock and secure by the end cap to

assure the air chamber is tight.

FS172

20. Using a hand pump, inflate the air chamber to

60 psi for the M-Series Sno Pro models or 65

psi for the Crossfire Sno Pro/F-Series Sno Pro

models.

„NOTE: The rear arm shock on the M-Series Sno
Pro should be inflated to 140 psi.

FS173

21. Install the valve cap.

FS174

Servicing Fox Zero Pro 

Shock Absorbers 

This procedure shows the proper methods for disas-

sembling, rebuilding, and assembling the pro shock

absorbers with no external damping adjustments.

„NOTE: Some illustrations and photographs
used in the following sub-sections are used for
clarity purposes and are not designed to depict
actual conditions.

DISASSEMBLING

1. Remove the steel sleeve and polyurethane bush-

ings from the eyelets on both ends of the shock.

2. Clean the entire shock assembly with soapy water.

Dry the shock assembly with compressed air.

„NOTE: If compressed air is not available, use
clean towel to dry the shock assembly.

3. Clamp the body eyelet of the shock securely in

vise with shaft side up.

! WARNING

Before starting, read through all of these instruc-
tions first to become familiar with the procedure.
Make sure the work area is clean and all of the nec-
essary tools are available. These shocks contain
high pressure nitrogen gas. Always use proper
safety equipment such as latex gloves and safety
glasses when working on shock absorbers.

! CAUTION

Use a soft-bristle brush to remove as much dirt and
debris as possible. Do not pressure wash the shock
as this can force water and debris inside causing
damage to the seals.

! WARNING

When using compressed air to dry components,
always wear safety glasses.