BENDIX SD-03-1000 Manuel d'utilisateur télécharger pdf

PRIMARY

CONTROL

PORT (41)

CAST PORT

IDENTIFICATION

SECONDARY

CONTROL

PORT (42)

RESERVOIR

SUPPLY

PORT (11)

MOUNTING

BRACKET STUDS

EXHAUST

PORT (1)

DELIVERY

PORT (22)

RESERVOIR

SUPPLY

PORT (11)

Bendix

Dual Relay Valve

SD-03-1000

DESCRIPTION

The Dual Relay Valve is a special purpose, multifunction

relay valve. It is typically used on articulated vehicles with

three or more axles. Normally mounted at the rear of the

vehicle, in proximity to the valves and chambers served, its

function is similar to a pilot relay and speeds the application

and release of control air pressure to the service relay

valve(s) on the rear most axle or axles of the vehicle. The

Dual Relay Valve is a pilot relay valve that responds to the

control air delivered to it from both circuits of the foot brake

valve. The Dual Relay Valve is controlled independently

by the front (secondary) and mid (primary) delivery circuits

of the dual circuit foot brake valve.

The Dual Relay Valve is supplied air from the rear axle(s)

service reservoir that is isolated from the other service

reservoirs forming a third service brake circuit on the

vehicle. With the addition of a third brake circuit the vehicle

will maintain braking on at least two axles in the event of a

single service system malfunction. In systems where this

valve is used, the brake circuits are designated as Front

(steering) Axle, Mid-Axle and Rear Axle.

Although typically nipple mounted to the rear service

reservoir the valve can be bracket mounted. Only four (4)

ports are utilized in the die cast body of the Dual Relay

Valve. All air connections are identiﬁ ed with raised numerals

with the following designations:

Port ID Size Designation

41 3/8 NPTF Primary Control Port

42 3/8 NPTF Secondary Control Port

12, 43 Plugged Not used

22 3/8 NPTF Delivery

11 3/8 NPTF Rear Service Reservoir

OPERATION

Refer to ﬁ gures 1 and 2. Each service reservoir is isolated

and is protected from loss of air in other service reservoirs.

The front and mid-axle service reservoirs supply air directly

to the secondary and primary circuits of the foot brake

valve, as well as antilock and traction components for their

respective circuits. The rear axle service reservoir supplies

air to the Dual Relay Valve, as well as the rear axle service

antilock relay and traction components.

FIGURE 1 - DUAL RELAY VALVE

1 2 3 4

Résumé du contenu

Page 1 - SD-03-1000

1PRIMARYCONTROL PORT (41)CAST PORT IDENTIFICATIONSECONDARY CONTROLPORT (42)RESERVOIR SUPPLYPORT (11)MOUNTING BRACKET STUDS EXHAUST PORT (1) DELIVERY P

Page 2 - PREVENTIVE MAINTENANCE

2BVA-85™MID REAR TO ACCESSORIES BA-922®TWIN CYLINDERCOMPRESSO R AD-IS EP EXTENDED PURGE AIR DRYER PP-D C™PUSH-PULL VALVE WITH INTEGRAL DOUBLE CHEC K

Page 3 - INJURY OR DEATH:

32. Inspect all air lines connected to the Dual Relay Valve for signs of wear or physical damage. Replace as necessary. 3. Test air line ﬁ ttings fo

Page 4

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BENDIX SD-03-1000 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Système de soudage BENDIX SD-03-1000. BENDIX SD-03-1000 User's Manual Manuel d'utilisatio

Résumé du contenu

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