BENDIX SD-13-4796 Fiche De Données

5. Carefully insert the assembled valve (33) and seat (34)

into the proportioning piston (30), making certain that

the coils of the valve spring (32) rest on the four tabs

of the valve (33). While holding the seat (34) in place,

install the retaining ring (36) to secure it in the piston

(30). Make certain the retaining ring is fully seated in

its groove.

6. Install both the large and small diameter o‑rings (31 &

29) on the proportioning piston (30).

7. Install both the large and small diameter o‑rings (27 &

28) on the blend back piston (26), then insert the small

diameter of the proportioning piston (30) into the small

diameter end of the blend back piston (26).

8. Carefully insert the assembled proportioning and blend

back pistons (30 & 26) into the cover (4).

9. Install the spring cage (25) in the blend back piston (26)

so that its flat side rests against the blend back piston.

10. Install the spring (24) in the cage (25) so that its coils

are within the I.D. of the cage.

11. Insert the service piston (23) in the cover (4) so that the

coils of the spring (24) are contained within the piston

and the six protruding posts of the piston are visible

after the piston is in the cover.

12. Install the o‑ring (22) on the exhaust piston (21) then

install the exhaust piston (21) in the cover (4). Refer

to the figure and make certain that the exhaust piston

(21) is installed with its concave surface away from the

service piston (23).

13. While holding the exhaust piston (21) in the cover (4),

install the retaining ring (20), making certain it is fully

seated in its groove.

14. Install the exhaust diaphragm (39) using its screw (37)

and washer (38) to retain it. Torque the screw to 8‑15

pound inches.

15. Install the valve retainer (15) on the inlet and exhaust

valve (16) so that the flange of the retainer (15)

surrounds the rubber portion of the valve. Install the

inlet and exhaust valve in the body (9).

16. Install the inlet and exhaust valve return spring (14) in

the body (9).

17. Install the large and small diameter o‑rings (13 & 12)

in the cover (11), then install the exhaust cover in the

body (9) taking care not to damage the o‑rings. Hold

the exhaust cover in place.

18. While depressing the exhaust cover (11), install the

retaining ring (10) in the body (9). Make certain the

retainer (10) is fully seated in its groove in the body.

19. If the Bendix

AR‑2

™

valve was equipped with a relay

piston return spring, install the spring in the body, large

diameter first.

20. Using lubricant to hold them in place, install the large

diameter sealing ring (19) on the cover (4) and the small

diameter sealing ring (40) on the body (9).

21. Install the o‑ring (18) on the relay piston (17), then install

the piston in the body (9).

22. After noting the relationship marks made prior to

disassembly, install the cover (4) on the body (9).

Secure the cover to the body using the two shortest cap

screws and lock washers (7). Make certain the sealing

rings (19 & 40) remain in place. Torque the cap screws

to 120‑150 pound inches.

23. Secure the mounting bracket (6) to the cover (4) using

the cap screws and lock washers (5), and torque the

cap screws to 180‑220 pound inches. Then secure the

mounting bracket (6) to the body (9) and cover (4) using

the two longest cap screws and lock washers (7) and

nuts (8) and torque the cap screws to 120‑150 pound

inches.

24. Install all air line fittings and plugs making certain thread

sealing material does not enter the valve.

25. Install the AR‑2

™

valve on the vehicle and perform

the Operation and Leakage Tests before returning the

vehicle to service.

O.D.

I.D.

KEY NO.

I.D.

O.D.

.862" 1.068" .103"

13  1.424"  1.630"  .103"
19  3.487"  3.693"  .103"
18  3.234"  3.512"  .139"
22  1.356"  1.496"  .070"
27  1.112"  1.318"  .103"
28

.737"

.943" .103"

.412"

.552" .070"

.739"

.879" .070"

.489"

.629" .070"

O-RING IDENTIFICATION CHART