BENDIX SD-03-3652 Bedienungsanleitung Seite 1

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1
SD-03-3652
Bendix
®
TP-3
®
Tractor Protection Valve
FIGURE 1 - BENDIX
®
TP-3
®
TRACTOR PROTECTION VALVE
DESCRIPTION
The Bendix
®
TP-3
®
Tractor Protection Valve is used in
combination with the Bendix
®
PP-3
Trailer Supply Valve
on pre-121 tractors, and the Bendix
®
PP-7
Trailer Supply
Valve, or the Bendix
®
MV-3
®
Valve, on post-121 tractors. It
contains a passage for trailer supply air and a service line
shut off valve. It is normally mounted behind the cab, with
the delivery line from the trailer supply valve connected
into the tractor emergency port and a delivery line from the
brake valve connected to the tractor service port. The trailer
supply and service hoses are mounted in their respective
ports in the TP-3 valve. See Figure 2.
OPERATION
Air from the trailer supply valve passes through the
emergency ports of the TP-3 valve to supply the trailer air
system and simultaneously exerts pressure on the end of
the plunger(11). The TP-3 valve requires approximately 45
psi to open the inlet valve. Whenever the pressure from
the trailer supply valve drops below 45 psi, the TP-3 valve
will close the service line shut-off valve.
PREVENTIVE MAINTENANCE
Important: Review the Bendix Warranty Policy before
performing any intrusive maintenance procedures. A
warranty may be voided if intrusive maintenance is
performed during the warranty period.
No two vehicles operate under identical conditions; as
a result, maintenance intervals may vary. Experience is
a valuable guide in determining the best maintenance
interval for air brake system components. At a minimum,
the Bendix TP-3 valve should be inspected every 6 months
or 1500 operating hours, whichever comes rst, for proper
operation. Should the TP-3 valve not meet the elements
of the operational tests noted in this document, further
investigation and service of the valve may be required.
TRACTOR
EMERGENCY
PORT
TRAILER
SERVICE
PORT
TRAILER
EMERGENCY
PORT
TRACTOR
SERVICE
PORT
O-RING(13)
INLET VALVE(4)
RETAINING RING(1)
O-RING(7)
SEAT
O-RING(12)
VALVE RETAINER(10)
PLUNGER(11)
CAP SCREW(3)
WASHER(8)
DIAPHRAGM(5)
DIAPHRAGM
SEAT(9)
VALVE SPRING(6)
RETAINING RING(2)
EXTERIOR VIEW
CROSS SECTION
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Inhaltsverzeichnis

Seite 1 - Tractor Protection Valve

1 SD-03-3652Bendix® TP-3® Tractor Protection ValveFIGURE 1 - BENDIX® TP-3® TRACTOR PROTECTION VALVEDESCRIPTIONThe Bendix® TP-3® Tractor Protection Val

Seite 2 - INSTALLING

2FIGURE 2 - SYSTEM SCHEMATICTRAILER SERVICE LINETRAILER EMERGENCY LINEFRONT RESERVOIRBRAKE VALVEREAR RESERVOIRDOUBLE CHECK VALVECOMPRESSORBENDIX® MV

Seite 3 - ASSEMBLY

3DISASSEMBLY(See Figure 1.)1. Remove the diaphragm seat retainer ring (1) while holding the diaphragm seat (9) in the body.2. While still holding th

Seite 4

4BW1572 © 2012 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 9/2012 • All rights reserved..

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