BENDIX PP-1 - User Manual

1
Bendix
®
PP-1
®
Valve
Bendix
®
PP-5
™
Valve
Bendix
®
RD-3
™
Valve
SD-03-3611
Bendix
®
PP-1
®
, PP-2
™
, PP-5
™
, PP-8
™
, & RD-3
™
Push-Pull Type Control Valves
Figure 1 – Push-Pull Type Control Valves
Bendix
®
PP-2
™
Valve
DESCRIPTION
The PP valves are push‑pull manually operable on‑o󰀨 air
control valves with an exhaust function. Most are pressure
sensitive, so that they will automatically move from the
applied to the exhaust position as supply pressure is
reduced to a certain minimum, depending on the
spring installed. The exception to this is the Bendix
®
PP-8
™
valve and some Bendix
®
PP-1
®
valves which
do not contain a spring. The PP-8 valve also has a
larger diameter shaft for button mounting so that when
installed on the same panel with other PP valves the
buttons cannot be inadvertently mixed. The PP-8 valve is
normally used to operate tractor spring brakes independently
from the trailer.
The Bendix
®
PP-5
™
valve is unique in having an auxiliary
piston in the lower cover which, upon receiving a pneumatic
signal of 18 psi or more, will cause the valve to move
from the applied to the exhaust position from a 100 psi
application.
The Bendix
®
RD-3
™
valve di󰀨ers slightly in that it normally
remains in the exhaust position and requires a constant
manual force to hold it in the applied position.
The Bendix
®
PP-2
™
valve has an auxiliary port which
may be plumbed into a service brake line to release the
spring brakes if a service application is made, preventing
compounding of forces on the foundation brakes.
PURPOSE OF THIS MANUAL
This document is intended to act as a source of maintenance
information to those involved in servicing Bendix
®
push-pull
type control valves.
ADDITIONAL SUPPORT
For additional service information, contact the Bendix
Tech Team online at techteam@bendix.com, or by calling
1-800-AIR-BRAKE (1-800-247-2725), option 2. Tech
Team members are available Monday through Thursday,
8:00 a.m. to 6:00 p.m. and Friday, 8:00 a.m. to 5:00 p.m. ET.
Bendix
®
PP-8
™
Valve

BENDIX PP-1 Specifications