Bendix Commercial Vehicle Systems TP-5 TRACTOR PROTECTION VALVE 5/11 - Manual (Page 2)

2
FIGURE 3 - BENDIX ® TP-5 ™ TRACTOR PROTECTION VALVE
END SECTIONAL VIEW
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 TP-5
™
valve should be inspected every 6 months or 1500 operating
hours, whichever comes fi rst, for proper operation. Should
the TP-5
™ valve not meet the elements of the operational
tests noted in this document, further investigation and
service of the valve may be required.
A maintenance kit is available under part number 289061.
For the latest service parts and kits, refer to the Bendix
Quick Reference Catalog (BW1114) available for order or
download at www.bendix.com.
SERVICE CHECKS
OPERATING AND LEAKAGE CHECKS
1. Charge the air brake system to governor cut-out, block
the wheels, and place tractor protection control valve
in the emergency position.
O-RING
(7)
CAP
NUT
(10)
O-RING
(5)
VALVE
(2)
O-RING
(6)
O-RING
(5)
CAP NUT
(12)
SERVICE LINE
SHUT-OFF
PISTON
(19)
DOUBLE
CHECK
GUIDES
(14)
DOUBLE
CHECK
SHUTTLE
(9)
CAP
NUT
(11)
O-RING
(7)
O-RING
(7)
O-RING
(3)
O-RING
(4)
DIAPHRAGM
(1)
EXHAUST
CHECK
VALVE
DIAPHRAGM
(8)
O-RING
(4)
COVER
(18)
FIGURE 4 - BENDIX ® TP-5 ™ TRACTOR PROTECTION VALVE
SIDE SECTIONAL VIEW
passage (see Figure 2). With common air to the supply side
and service side of the manifold the valve should open at
approximately 45 psi.
If the Bendix ® MV-3 ® tractor supply valve is manually or
automatically moved to the exhaust position, the service
line shut-off valve will close at approximately 10 psi and
the exhaust passage in the plunger will vent the trailer
service line.
DOUBLE CHECK VALVES
The two double check valves in the Bendix ® TP-5 ™ valve,
as seen in schematic view Figure 2, serve to pick up the
highest pressure service signal from either the tractor front
brake circuit, rear brake circuit or TC valve signal, operating
the trailer brakes accordingly. The stop light switch port
also picks up this signal and actuates the stop light switch.
SERVICE LINE QUICK RELEASE VALVE
The trailer service line port is located in the cover, as seen
in Figure 3. This cover also houses a quick release valve.
Diaphragm (Item 1 in Figure 3) seals off the exhaust port
on application and upon release of service line application,
permits the trailer service line air to exhaust through the
exhaust port, thus permitting faster release times for trailer
brake release.
RETAINING
RING
(15)
SPRING
(16)
CAP
NUT
(13)
INSERT
(9)
#6
TORX/
PN
SCREW
(17)