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CROSS
2. AIR SUSPENSION FORK
Air suspension fork compression is setup by pumping up air into fork air chamber. Valve for
pumping up air is in upper part of left fork leg. Unbolt valve cover and pump up till the
needed pressure according below chart is reached. Use only high pressure pumps for forks
with manometer.
Recommended pressure rates for pumping up
SR SUNTOUR air suspension fork:
rider weight
air pressure
36 kg
51 PSI
45 kg
64 PSI
54 kg
77 PSI
64 kg
91 PSI
73 kg
104 PSI
82 kg
117 PSI
91 kg
130 PSI
100 kg
143 PSI
IMPORTANT WARNING
Maximum allowable pressure is 150 PSI!
WARNING
Be careful when connecting pump hose with fork air valve to avoid valve thread damage. Use
microvalve on pump under manometer to precise pressure setup. A bit of air can run away
from valve when disconnecting pump. Check with manometer how much of air run away and
pump it up again to the fork. Finally close valve with cover.
FORK COMPRESSION LOCK OUT - SPEED LOCK
Some forks have hydraulic lock out system. Fork lock out enables reduce fork teetering what
increases pedaling efficiency when riding uphill or sprinting.
Fork's lock out setup unit is placed in upper part of right fork leg. Lock out is operated by blue
lever with Speed Lock tag. Turn Speed Lock clockwise for lock out, turn counter clockwise to
unblock compression and fork will work in normal mode.
IMPORTANT WARNING
Fork compression lock out is intended for use when riding in less difficult terrain. It is
necessary to unblock fork when riding in rough terrain otherwise fork lock out system
could be damaged!
FORK MAINTENANCE
CLEANING / LUBRICATION - regular maintenance is crucial for proper fork operation, mainly
maintenance of friction areas between outer and inner fork legs. Dust seal and gasket which
keep friction areas from contamination must be not damaged and must protect whole
perimeter of friction area. Keep clean inner leg's sliding area, after each ride clean dust or
moisture by soft cloth and lubricate. Use detergent solution and soft brush for outer fork
cleaning. When cleaning take extra care to prevent water reach gap between inner and outer
fork legs. Never use high pressure cleaning devices. Moisture and dirt inside fork have negative
impact on fork operation, dirt inside fork cause higher friction between bushings and inner
fork's legs which may lead to fork components lifespan shortening.
Keep following instructions to retain perfect fork operation:
• After each ride clean up inner fork legs, dust seals and gaskets of inner fork legs from dirt
like dust, moisture or mud.
• After each 25 hours of operation (or after each ride in extreme conditions like mud or wet sand):
1. Lubricate dust seals and gaskets by oil with teflon.
2. Check all fork screws if they are tight enough.
3. Check any fork parts for damages. If you find any damaged or worn out fork parts replace
them by new original parts. Never ride on bicycle with damaged fork!
• It is recommended to let special service execute fork inspection (SERVICE 1) after each 50
hours of operation.
• It is recommended to let special service execute fork inspection (SERVICE 2) after each 100
hours of operation.
SERVICE 1 - recommended service operations: inspection of fork's function, bushings cleaning
and greasing, remote control cable and hose lubrication, torque parameters checking,
air pressure checking, fork's condition inspection oriented on legs detrition and fork parts
damages.
SERIVCE 2 - recommended service operations: SERVICE 1 + fork disassembling, all fork parts
cleaning, dust seals and oil wipers lubrication, remote lock out control greasing, air valve
gasket and air pressure checking, torque parameters checking.
WARNING
Use high quality lubricants which content teflon for fork lubrication. Do not use
lubrications which content lithium such lubricants could damage inner fork parts.
It is recommended to visit special cycle service if fork maintenance requires special tool usage.
owner'smanual
8
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