- Special Notes
- Button and mtg. nut are NOT furnished with this valve
- Product Description
- Manufacturer: Bendix
- Part Number: 288721X
- Condition: Remanufactured
- Bendix reman valves have the same warranty as new valves
- Automatic pressure release = 40 psi
- Shaft Size: 3/8"
- Exhaust Port: 1/4" NPT
The PP-7 push-pull control valve is a pressure sensitive,
on/off control valve which will automatically return to
the exhaust (button out) position when supply pressure
is below the required minimum. It may be manually
operated to either position when pressure is above
the required minimum. Button configuration and
lettering may vary depending on application.
The automatic exhaust pressure is 40 psi.
The PP-7 is used to control the tractor protection
system and is generally identified as the trailer air
supply valve. The valve employs an air operated
interlock in the lower body which will apply the
trailer brakes when the tractor spring brakes are
applied. The interlock insures that the tractor spring
brake can not be applied without the trailer spring
brakes also being applied. Normally this action will
not affect the position of the PP-7 valve button. The
interlock of tractor and trailer parking is a requirement
of FMVSS 121.
Cross References: 288721, 287280, 287280X,
R955288721, RKN20025, 101307, 131040, 288239, KN20025,
745-288721, WA288239, 288721B1, 2EL549, S5677, 034051,
A cross reference listing means that this valve is a
suitable replacement for the part numbers listed.
Some changes in air line plumbing may be required.