Penske Racing Shocks 8760 Series - Manual (Page 12)

12
Rebound Adjusters
The rebound adjuster on the 8100 and 8700 Series shock absorber is
located in the eyelet at the base of the main shaft. Inside the window is
an adjustment screw, which serves as the control point for rebound
adjustments. (Figure 1)
The 8760 rebound adjuster (red knob) is located at the base of the
eyelet. (Figure 2)
During the rebound (extension) stage of the shock movement, fluid is
forced 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 jet. By turning in the rebound adjuster (clockwise), the needle
is forced up into the jet, restricting the fluid, causing firmer rebound
damping forces. In reverse, by turning the adjuster out (counter clock-
wise), more oil is allowed to pass through the jet causing lighter rebound
damping forces. The rebound adjustment assembly, is a timed control for
the shims located on the main piston to work.
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. It can be thought of as a combination of the 10
o , 5 o , and 3 o needles.
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
™ to the threads and torque to 120 in•lbs.
Figure 2 Figure 1
25 +/ - clicks
30 +/- clicks
+ = More Damping
- = Less Damping
Ж
Ж
ADJUSTER
KNOB
- +
ADJUSTMENT
SCREW