Snowmobile Arctic Cat 2-Stroke (2007 year). Manual - part 159

9-149

9

FS055

3. Pour the oil from the shock body into a suitable

container.

FS056

4. Using a 3/16-in. Allen wrench, remove the set

screw.

FS057

FS058

„NOTE: Account for a set screw, 5/16-in. ball,
spring, spring rod, and a 1/4-in. ball.

FS059

5. Remove the pressure valve assembly. Account for

the O-ring.

FS060

6. Using IFP Removal Tool (p/n 0644-348), remove

the floating piston.

FS061

7. Items to inspect:

A. Shock shaft for straightness, nicks, or burrs.

B. Shaft bearing assembly — clean, inspect, or

replace.

C. Inside of shock body for scratches, burrs, or

excessive wear.

D. Piston strap for cuts, chipped or nicked edges,

or excessive wear.

E. O-rings for nicks, cuts, or cracks.

9-150

F. Valves for kinks or waves.

G. Rubber damper (ski shocks only) for chipping,

cracking, or being missing.

8. Items to replace:

A. Floating piston O-ring.

B. Shock shaft bearing assembly if any signs of oil

leaks or damage.

C. Any part worn or damaged.

„NOTE: For shaft eyelet replacement, see Shaft
Eyelet sub-section.

ASSEMBLING

1. Set Floating Piston Installation/Location Tool (p/n

0644-402) to 5.90 in.

FS062

2. Lubricate the O-ring and Teflon strap on floating

piston; then press the floating piston into shock

until flush with the top of the body.

FS063

FS064

3. Install floating piston tool onto floating piston;

then press floating piston into shock body 5.90 in.

FS065

FS066

4. Install the pressure valve assembly and tighten to

2.1-2.5 kg-m (15-18 ft-lb).

FS060

9-151

9

5. Fill shock body with lightweight synthetic Shock

Oil (p/n 2639-151) to bottom of threads.

FS068

6. Install by-pass components: 1/4-in. ball, spring

rod, spring, and 5/16-in. ball.

FS069

FS070

FS071

FS072

7. Install the set screw and tighten to 1.0 kg-m (7 ft-

lb).

FS073

8. Install shock rod/piston assembly into body.

„NOTE: The bearing assembly should be down
against the piston assembly (rod fully extended)
for installing purposes.

FS074

9. While holding up on the eyelet, thread the bearing

assembly into the body.

9-152

FS076

„NOTE: Air will bleed out of flat area on the bear-
ing assembly.

FS075A

10. Using a 1-in. wrench, tighten the bearing assembly.

FS077

11. Pressurize the shock with nitrogen to 200 psi (see

Pressurizing Rebuildable Shocks sub-section).

FS078

12. Install the valve screw (with O-ring) into the pres-

sure valve assembly.

FS079

13. Test operation of the shock.

„NOTE: Shock should feel soft on compression;
constant on rebound.

FS080

INSTALLING

1. Place the shock into position on the snowmobile.

2. Secure with existing hardware. Tighten to 3.2 kg-

m (23 ft-lb).

Rebuilding/Recharging 

Fox Air Shocks

DISASSEMBLING

1. Remove the valve cap; then bleed the air from the

air chamber.

! WARNING

Always wear latex or rubber gloves when servicing a
shock absorber with shock oil.