Ski-Doo FORMULA S 1997, Shop Manual

Page: 553 / 926

Section 06 REAR SUSPENSION
Sub-Section 02 (SC-10 SUSPENSIONS (ALL VERSIONS))
06-02-18
Preset your pressure regulator to 2070 kPa (300
PSI) nitrogen (N
2
), this gas pressure will restore
the correct pressure for your damper.
NOTE: Carefully inspect damper for gas or
oil leaks. Any leaks must be corrected before
continuing.
Damper gas pressure can be confirmed by using
a pressure gauge available through your local in-
dustrial gas supplier.
1. Automotive type air pressure hose
2. Two stage regulator, delivery pressure range 2070 KPa (300 PSI)
3. High pressure cylinder filled with industrial grade nitrogen
4. Valve tip
Reinstall damper spring retainer, then your spring.
Next, thread the spring pre-load rings up to the
spring. Set pre-load according to recommended
spring length specifications. Your damper is now
ready for reinstallation to your snowmobile.
L: FRONT = 76 mm (3 in)
CENTER = 70 mm (2-3/4 in)
Miscellaneous Information
– Never substitute the nitrogen gas fill for anoth-
er gas product. The nitrogen gas has been se-
lected because of its inert qualities. As well as
being a dry gas (moisture free), it will not con-
taminate the gas chamber portion of the damp-
er.
– When selecting shim stacks, 2 thin shims of
equal thickness to one thick shim will offer less
resistance than one thick shim. Refer to SHIM
EQUIVALENCE FOR SAME DIAMETER table
above.
– Whenever building a rebound shim stack, al-
ways use 26 mm (1.02 in) diameter shims
against the piston. No less than 3 shims should
be used in any valve stack to prevent bending
or breakage. Approximately .203 mm (.008 in)
clearance should be allowed between shim
stack and valve stopper washer.
– Whenever building a compression shim stack,
always use 30 mm (1.181 in) diameter shims
against the piston. No less than 3 shims should
be used in any valve stack to prevent bending
or breakage. One .114 mm spacer washer min-
imum (2 or more recommended) should be
used between shim stack and valve stopper.
-
CAUTION
Do not exceed the recommended pressure
values.
◆
WARNING
Whenever working with high pressure gas,
use eye wear protection. Never direct gas
pressure toward anybody.
'
4
2
1
3
A06F0QA
A06F1DA
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