Penske 8900 series, Техническое руководство

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8760 Needle and Jet
The 8760 jet and needle combination have been designed to give the user a broader and more linear range of adjust-
ment for bleed past the piston on rebound.
The 8760 jet utilizes a spring loaded poppet valve to check the flow. This gives a better seal against the flow and a
quicker response time as the shaft changes direction.
This needle has a curved parabolic tip, which gives a very fine, linear adjustment in damping across the entire range
provided by the jet.
The 8760 needle and jet will fit any of our
adjustable shafts, but they must be used
together and cannot be interchanged with
older style needles and jets.
When installing any jet, apply a tiny drop of blue
Loctite
TM
to the threads and torque to 120 in•lbs.
8900 Series Rebound Adjuster
The rebound adjuster screw on the 8900 Series
shock absorber is located in the adjustable
platform at the base of the main shaft.
The rebound adjuster has 25 to 30 clicks of
adjustment. Note: the external rebound adjust-
ment is only a fine tuning device for the main
valving located inside the shock absorber.
During the rebound (extension) stage of the shaft
movement, fluid flows through two ports in the
main shaft. Inside the main shaft is a needle and
jet assembly which adjusts the amount of fluid
passing through the ports. By turning in the
rebound adjuster (clockwise), the needle is
moved into the jet, restricting the flow, causing
firmer rebound damping forces. In reverse, by
turning the adjuster out (counter clockwise), more
oil is allowed to pass through the ports causing
lighter rebound damping forces. This rebound
adjustment assembly, is in fact a timed control for
the rebound shims located on the main piston.