BENDIX ATR-2 ANTILOCK TRACTION VALVE Service Data Sheet - Page 12

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in place, install retaining ring(30) to secure it in the

piston(28). Make certain the retaining ring is fully seated

in its groove. Make sure the valve is straight, against

the exhaust seat and free to move.

6. Install both the large and small diameter o-rings(27 &

29) on the proportioning piston(28).

7. Install both the large and small diameter o-rings(25 &

26) on the blend back piston(24), then insert the small

diameter of the proportioning piston(28) into the small

diameter end of the blend back piston(24).

8. Carefully insert the assembled proportioning and blend

back pistons(24 & 28) into the bore in the cover(2). Do

not cut or pinch the o-rings.

9. With the bore of the cover facing up, install the spring

cage(23) in the blend back piston(24) so that its flat

side rests against the blend back piston. The concave

side of the spring cage should face toward the spring(22)

which is installed next.

10. Install the spring(22) in the cage(23) so that its coils are

within the I.D. of the cage.

11. Install the small and large diameter o-rings(44 & 37) on

the inlet seat(36) then insert the inlet seat into the bore

in the cover(2).

12. Install the small and large diameter o-rings(21 & 20) on

the check valve seat(16).

13. Install the spring(19) on the inlet seat(36) so that the

small diameter fits over and around the air passage

through the center of the inlet seat.

14. Install the check valve(17) and valve guide(18) in the

check valve seat(16). Note; The check valve must be

installed so that the "top hat" portion fits into the valve

seat(16). Install the valve guide(18) so that its flange

contains (surrounds) the coils of the large end of the

spring(19), when the valve seat(16) is installed in the

cover(2). Use a small amount grease to hold these parts

in the valve seat(16).

15. Install the assembled valve seat(16) with the check valve

and valve guide(17 & 18) into the cover(2) bore and while

holding it in place install the retaining ring(15). Make

certain the retaining ring is fully seated in its groove.

16. Install the valve retainer(8) on the inlet and exhaust

valve(9) so that the flange of the retainer(8) surrounds

the rubber portion of the valve. Install the inlet and exhaust

valve in the body(1).

17. Install the inlet and exhaust valve return spring(7) in the

body(1).

18. Install the large and small diameter o-rings(5 & 6) in the

exhaust cover(4), then install the exhaust cover in the

body(1) taking care not to damage the o-rings. Hold the

exhaust cover in place.

19. While depressing the exhaust cover(4), install the

retaining ring(3) in the body(1). Make certain the

retainer(3) is fully seated in its groove in the body.

20. If the valve was equipped with a relay piston return

spring(14), install the spring in the body, large diameter

first.

1 2 3 4

O-Ring Identification

Key

Description

Qty.

O-Ring

O-rings available in maintenance kit piece no. 109359.

FIGURE 14 - O-RING IDENTIFICATION CHART

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

and small sealing rings(11 & 35) on the cover(2).

22. Install the o-ring(13) on the relay piston(12), then install

the piston in the body(1).

23. Note the relationship marks made prior to disassembly,

then install the cover(2) on the body(1). Secure the

cover(2) on the body(1) using the two, short cap

screws(40). Again, noting the relationship marks, secure

the bracket(41) on the cover(2) and body(1) and using

the two long cap screws(10), washers(45 and 46) and

two nuts and washers(43). Torque the four cap screws

to 120 to 150 lb. in.

24. Install the two cap screws(42) that secure the bracket(41)

to the cover(2) and torque to 180 - 220 pound inches.

25. Noting the relationship marks made during disassembly,

secure the controller(39) to the cover(2) using the four

cap screws(38). Torque the four cap screws to 50-80

pound inches.

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

sealing material does not enter the valve.

27. Install the rebuilt valve on the vehicle and perform the

OPERATION AND LEAKAGE TESTS before placing the

vehicle in service.

I.D."

1 2 3 4 5

O.D."

SECTIONAL SIDE

VIEW OF HOW AN

O-RING IS

MEASURED.

I.D.

O.D.

0.862

1.068

0.103

1.424

1.63

0.103

3.487

3.693

0.103

3.234

3.512

0.139

1.362

1.568

0.103

1.114

1.254

0.07

1.112

1.318

0.103

0.737

0.943

0.103

0.412

0.552

0.07

0.739

0.879

0.07

0.489

0.629

0.07

1.356

1.496

0.07

1.176

1.316

0.07