Dry Bleed System


An affordable Dry Bleed System has been designed for use with any AP Racing caliper suitable for 'O' Ring & Non 'O' Ring bleed screws.
The male dry bleed valve is fitted in place of the bleed screw, and once fitted there should be no need to loosen or remove the coupling unless it is being replaced.
The male coupling is basically a valve that is opened when the female bleed valve coupling is connected to it. The female coupling is connected to a bleed pipe and container allowing brake fluid to be pushed through the system to bleed it. Another advantage of the dry bleed system is that it removes the possibility of introducing air into the system via bleed screws when vacuum bleeding.
The dry bleed caliper fittings are available with M10 x 1.0mm or 3/8" UNF threads.
When fitting the dry bleed valve in to the caliper a small amount of Loctite 270 should be applied to the thread and the coupling tightened to a torque of 13Nm.
Seal kits are available for the male dry bleed valves. See table below for part numbers.
Important Note: Fitting the dry bleed system may effect the radial profile of the caliper. It is therefore essential that the clearance between the caliper assembly and wheel is checked carefully prior to running the car.

Dry Bleed
Valves
Thread
Material
Weight
Repair
Kit
Replaced
Bleedscrew
CP6300-21
M10 x 1.0mm
Stainless
Steel
16g
CP6300-21RK
CP4970-125
CP4970-140
CP4970-136
CP6300-27
3/8" UNF
Stainless
Steel
16g
CP6300-30RK
CP5820-115
CP6297-112
CP6300-28
(Non O-Ring Version)
M10 x 1.0 
Stainless
Steel
17g
CP6300-28RK
3486-268
CP3720-173
CP3720-183
CP3720-107
CP3894-138
CP6300-30
3/8" UNF
Titanium
8g
CP6300-30RK
CP5820-115
CP6297-112
CP6300-37
(Non O-Ring Version)
3/8" UNF
Stainless Steel
17g
CP6300-28RK
3846-227
CP3720-182
Bleed Coupling
CP6300-31
Threaded bleed coupling
Note: This coupling is only designed for bleeding the calipers and not for use at high pressure.
CP6300-32
Bleed coupling with non threaded outlet
and one way valve fitted

Note: This coupling is only designed for bleeding the calipers and not for use at high pressure.
CP6300-36
Short 150° Bleed coupling with non threaded outlet and one way valve fitted
Note: This coupling is only designed for bleeding the calipers and not for use at high pressure.