Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Brake Proportioning/Combination Valve

Proportioning valve output fluid pressure
Split point 2.7 - 3.2 mm (391 - 462 inch)
When input fluid pressure is 9.8 MPa (1,422 psi). 4.3 - 5.1 mm (619 - 732 inch)
Proportioning valve output fluid pressure difference between left and right 0.4 MPa (57 psi)