Air Brake TP-3 Tractor Protection Valve For Some M939 Series Versions, M916A3, & HEMTT, 279000

Air Brake TP-3 Tractor Protection Valve For Some M939 Series Versions, M916A3, & HEMTT, 279000
Item# 279000
$22.00

Product Description

TP-3 tractor protection valve. P/N 279000. NSN 4820004363033. Used on some M939 series versions, M916A3, and M977 HEMTT. Also commercial truck applications.

Port pipe thread sizes are:
Tractor Service : 3/8
Tractor Emergency : 1/4
Trailer Service : 1/2
Trailer Emergency : 1/2

The TP-3 valve is used in combination with the dash mounted trailer supply valve to provide a means of controlling the two air connections (service and emergency) leading to the trailer. It automatically closes the service line in the event of a tractor trailer breakaway or reduction of tractor system air pressure. Requires approximately 45 psi or greater from the tractor emergency line to open the service inlet valve.

2.5 lb