Penske Racing Shocks 7300 Series - Manual (Page 3)

7300 Head Valve
VARIABLE BLEED JET
JT-000VB
JT-015
JT-030 JT-040
CD SCREW
(160 in•lbs)
SC-73HV
CD SPACER
BU-73HV
CONSTANT SHIMS
COMPRESSION SHIM STACK Ø.625 ID”
(Ø1.350” BASE SHIM)
REMOVABLE HEAD VALVE (240 in•lbs)
PI-73HV-125
REBOUND RETURN SHIMS
(Ø.625 X 1.350”)
*recommended
1.350 x .004 (2)
.750 x .020 (1)
CONSTANT SHIM Ø.625 ID”
.750 X .020 (1)
O-RING
OR-2032-B
Grease for HV installation
MAIN BODY
BD-737, 738 or 739
* Compression shim stack
+ constant shims
≥≥≥≥≥
.100”
CD NUT
NT-73HV
Penske Racing Shocks would like to announce our new 7300 Removable Head Valve shock bodies. The new shock
bodies include a female thread to accept the head valve piston or insert. These replace the one-piece head valve
design and all non-head valve bodies.The new bodies come standard with an aluminum insert (P/N: SC-73INS) that
maintains the piston bore the length of the body. If permitted by racing series rules, the insert may be removed, and
the new removable head valve can be installed per the assembly instructions.
For reliability and safety reasons, Penske Racing Shocks requires that the new shock body design be used with either
the supplied insert or the new removable head valve installed. The new shock bodies are not to be used without one of
these items installed.
A removable head valve tool (P/N: TL-73INS) will be made available to all teams. This tool can be used to remove the
supplied insert and install the new head valve. The assembly instructions shown below should be used when installing
either the new head valve or the insert.
The new removable head valve design offers more tuning options and interchangeability than the previous design.
The new bodies can be used with or without a head valve installed, allowing technicians to utilize one single body
design for every application or track where two were needed previously. A shim rebound return has also been incorpo-
rated which increases rebound flow area and enhances damper response time during changes of stroke direction from
compression to rebound. In addition, the new head valve assembly uses removable variable bleed jets (the same
used in the Variable Bleed Pistons). The variable bleed jets can be interchanged quickly and easily (without disassem-
bly of the head valve) and eliminates the need for drilling bleed holes in a poppet. A more tunable compression valve
stack reduces the maximum base shim diameter to 1.350” for more efficient flow control and both head valve piston
faces now include ½° of dishing.
These new features make the removable head valve shock more user-friendly, more universal,
and a proven performance enhancement for professional racing teams!