BENDIX BP-R1 BOBTAIL PROP RELAY VALVE, Manual

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FIGURE 10 - BP-R1 ™ BOBTAIL BRAKE PROPORTIONING RELAY VALVE
10
30
31
13
14
11
12
1
4. Connect the tractor service and emergency “glad
hands” (hose couplings) to hose couplings that have
been plugged, or alternatively, to a trailer. Build the trac-
tor system air pressure to governor cut-out and make 4
to 5 full brake applications. Check the air fi ttings at the
BP-R1
™ valve for leakage. Tighten as needed.
5. With the trailer supply valve (dash control w/red oc-
tagonal button) and system park control (dash control
with yellow diamond button) activated for tractor/trailer
operation, apply,
hold , then release the brakes several
times varying the application pressures while watch-
ing the reaction of the gauges installed on the BP-R1
™
valve. Check that a prompt application occurs and that
it can be held then promptly released.
4
5
6
7
8
9
3
35
15
17A
18
23
20A
22
24
25
27
29
33
28
34
32
36
37
2
BODY
........................................... 1
VALVE COVER
................................. 2
RETAINING RING
.............................. 3
EXHAUST COVER
............................. 4
O
-
RING
.......................................... 5
O
-
RING
.......................................... 6
VALVE SPRING
................................ 7
VALVE RETAINER
............................. 8
VALVE ASSEMBLY
............................ 9
CAP SCREWS
............................... 10
O
-
RING
........................................11
RELAY PISTON
.............................. 12
O
-
RING
....................................... 13
RETURN SPRING
........................... 14
RETAINING RING
............................ 15
DUST SHIELD
(
IF FITTED
) ................. 16
EXHAUST PISTON
(
ORIGINAL STYLE
) ... 17
EXHAUST PISTON
(
NEW STYLE
) ...... 17A
EXHAUST PISTON O
-
RING
................ 18
EXHAUST DIAPHRAGM
(
IF FITTED
) ...... 19
SERVICE PISTON
(
ORIGINAL STYLE
-
RE
-
QUIRED O
-
RING
21) ....................... 20
SERVICE PISTON
(
NEW STYLE
-
DOES NOT
REQUIRE O
-
RING
) ........................ 20A
SERVICE PISTON O
-
RING
(
IF FITTED
) . 21
SPRING
....................................... 22
SPRING CAGE
............................... 23
BLEND BACK PISTON
...................... 24
O
-
RING
........................................ 25
O
-
RING
........................................ 26
O
-
RING
........................................ 27
PROPORTIONING PISTON
................. 28
O
-
RINGS
..................................... 29
RETAINING RING
............................ 30
O
-
RING
....................................... 31
INLET VALVE SEAT
......................... 32
INLET VALVE
................................. 33
VALVE SPRING
.............................. 34
SEALING RING
.............................. 35
EXHAUST COVER SCREW
................ 36
EXHAUST COVER
........................... 37
Note:
Early models used
a Diaphragm(19),
Dust Shield(16)
Service Piston(17),
and
o-ring(21)
26
15
17
19
16
18 20
21