Patent ID: 8869831

Claim:
A traction valve, comprising: a body defining an inlet port, an outlet port, and a traction supply port, said outlet port configured for fluid communication with a fluid chamber defined in a housing of a relay valve; a first fluid control valve supported on said body, said first fluid control valve including a valve member configured to move between a first position preventing fluid communication between said fraction supply port and said outlet port and a second position permitting fluid communication between said traction supply port and said outlet port; wherein said body and said first fluid control valve are configured to receive any of a plurality of interchangeable second fluid control valves between said inlet port in said body and said first fluid control valve, each of said plurality of interchangeable second fluid control valves configured to perform a different function such that said traction valve assumes a first configuration upon assembly of one valve of said plurality of interchangeable second fluid control valves with said body and said first fluid control valve and a second configuration, different from said first configuration, upon assembly of another valve of said plurality of interchangeable second fluid control valves with said body and said first fluid control valve wherein said body includes a first portion having means for attaching each of said plurality of interchangeable second fluid control valves to said body and a second portion defining said inlet port, said second portion configured for attachment to each of said plurality of interchangeable second fluid control valves.