BRP ski-doo MACH Z 1000 SDI, Handbook

Page: 56 / 493

03-26
MMC2005-001_03A.FM
SECTION 03 - CHASSIS PREPARATION
CAUTION: Use care when passing piston into
damper body at damper body threads.
Slight oscillation of damper rod may be required to
allow piston to enter damper body bore.
Slowly push piston into damper body. Slight up and
down movement may be required to allow all air to
pass through piston assembly. The gentle tapping
of a small wrench, on the shock eye, may help
dislodge air trapped in the submersed piston. Be
careful not to drive the shaft any deeper into the
oil than is necessary to just cover the shim stack.
NOTE: Fast installation of the damper rod may dis-
place the floating piston from its original position.
This must not occur if the damper is expected to
perform as designed.
With damper rod piston into-oil, TOP OFF damper
oil volume. Oil level should be to damper body
thread base.
Seal carrier assembly can now be threaded into
damper body. This should be done slowly to allow
weapage of oil and to minimize IFP displacement.
After the seal carrier is fully in place avoid pushing
the shaft into the body until the nitrogen charge is
added.
1. Torque seal carrier to 88-89 N•m (65-66 lbf•ft)
1. Schrader valve 1.5-2 N•m (13-17 lbf• in )
2. Schrader cap 5-6.5 N•m (44-57 lbf• in )
Adding Gas Pressure
Nitrogen (N
2
) can now be added to damper body.
NOTE: Never substitute another gas for nitrogen.
Nitrogen has been selected for its inert qualities
and will not contaminate the gas chamber of the
shock.
Preset your pressure regulator to 2070 kPa (300
PSI) nitrogen (N
2
), this gas pressure will restore
the correct pressure for your damper.
CAUTION: Do not exceed the recommended
pressure values.
When removing and retightening the Schrader
valve acorn nut use minimal torque. When the cap
is over tightened and subsequently removed it
may prematurely break the seal of the Schrader
valve to the shock body and cause a loss of nitro-
gen charge without being noticed. If you suspect
this has happened then recharge the shock as a
precaution. Inspect the acorn cap before installa-
tion to ensure that the internal rubber gasket is in
its proper position.
NOTE: Carefully inspect damper for gas or oil
leaks. Any leaks must be corrected before con-
tinuing.
Damper gas pressure cannot be confirmed by us-
ing a pressure gauge. The volume of gas in the
shock is very small, and the amount lost during
gauge installation will lower the pressure too
much and require refilling.
A06F17A
1

WARNING
Whenever working with high pressure gas,
use eye wear protection. Never direct gas
pressure toward anybody.
A06F18B
2
1