BENDIX R-12DC Dados de serviço - Página 6

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BENDIX R-12DC Dados de serviço
KEY NO.
DESCRIPTION
1
VALVE COVER
2
VALVE SPRING
3
CHECK VALVE GUIDE
4
CHECK VALVE
5
O-RING
6
DOUBLE CHECK COVER
7
O-RING
8
O-RING
9
RELAY PISTON
10
VALVE BODY
11
INLET & EXHAUST VALVE
12
VALVE RETAINER
13
SPRING
14
O-RING
15
O-RING
16
EXHAUST COVER
17
RETAINING RING
18
DIFFERENTIAL SPRING (IF USED)
(CONTROLS CRACK PRESSURE*)
DIFFERENTIAL SPRINGS
*Crack pressure is the amount of control
pressure required by the valve to initiate
air delivery. For crack pressures other
than 4 psi, a differential spring is used
in the assembly to produce the required
valve response.
(Models designed to have a 4 psi crack
pressure do not require a differential spring.)
Figure 8 – Bendix
R-12DC
®
4. Remove and discard the sealing ring (7) from the cover
(1), and mounting bracket.
5. Remove the piston (9) from the body (10) and retain for
reuse.
6. Remove and discard the o-ring (8) from the piston (9).
7. Depress and hold the exhaust cover assembly (16)
and remove and discard the retaining ring (17) from
the valve body (10).
8. Slowly release the holding force on the exhaust cover
assembly (16) to relax the spring.
6
18
DIFFERENTIAL SPRING
(NOT REQUIRED FOR MOST
MODELS.
SEE BELOW)
HORIZONTAL
DELIVERY
PORTS
Exploded View
®
1
VERTICAL
DELIVERY
PORTS
9. Remove and discard the following parts:
a. Exhaust cover assembly (16)
b. O-rings (14 & 15)
c. Spring (13)
d. Inlet/exhaust valve (11)
e. Retainer (12)
CAP SCREW
PRIMARY CONTROL
PORT 1/4 NPT
3
2
5
4
6
7
SECONDARY
CONTROL PORT
8
1/4 NPT
9
10
SUPPLY
PORT
11
12
13
14
15
16
17
CAP
SCREW