BENDIX SR-4 SPRING BRAKE CONTROL VLV Руководство - Страница 5

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BENDIX SR-4 SPRING BRAKE CONTROL VLV Руководство

CHECK

VALVE "B"

CHECK

VALVE "C"

FIGURE 4

™

SR-4

VALVE DISASSEMBLY

(TYPE 1 REFER TO FIG. 4)

REMOVAL AND DISASSEMBLY OF THE PRESSURE

PROTECTION PISTON (FIG. 4)

1. Remove the four round head machine screws which

secure the spring retainer (1) to the valve body. NOTE:

Take caution when removing the spring retainer as it is

spring loaded.

2. Remove the spring (2) and pressure protection piston

assembly (3).

3. Remove the inlet valve (4) from the piston stem and

o-rings (5) from the piston. NOTE: Do not attempt to

remove the retaining ring and stem from the piston.

REMOVAL AND DISASSEMBLY OF THE CONTROL

PISTON

4. Note and mark the position of the control piston cover

(6) on the valve body. Remove the four 1/4 inch -20

hex head cap screws and lock washers which retain

the cover to the body.

5. Remove the cover, seal ring (7), control piston assembly,

and spring (8) from the valve body.

6. From the control piston (9) remove the three o-rings

(10, 11 & 12).

CHECK

VALVE "A"

EXHAUST

(17 - SCREW)

PORT

(18 - WASHER)

(19 - DIAPHRAGM)

7. Remove the reservoir port ﬁ tting (13) from the valve

body.

8. Remove the o-ring (14) from the reservoir ﬁ tting.

REMOVAL OF CHECK VALVE "C"

9. Place the reservoir ﬁ tting (13) in a vise and remove

retaining ring (23), valve retainer (24), spring (25) and

check valve (26).

10. Remove the inlet valve spring (15), and inlet and

exhaust valve (16).

11. If so equipped, remove the screw (17), washer (18) and

diaphragm (19) from the exhaust port.

REMOVAL OF THE TWO SINGLE CHECK VALVES "A"

& "B"

NOTE: Figures 2 and 4 show check valve "A" and check

valve "B" out of position for illustration.

12. Remove the two 3/8 inch socket head pipe plugs which

retain the two single check valves in the body.

13. Remove the two check valve springs (20), and rubber

check valves (21).

METAL I.D.

TAG

IF EQUIPPED