BENDIX BW1671 ユーザーズマニュアル

®

LED DIAGNOSTIC

DISPLAY

14-PIN

CONNECTOR

M-12

™

MODULATOR

DELIVERY

DELIVERY

SUPPLY

CONTROL

EC-11

™

CONTROLLER

The Bendix

®

 MC-11

™

 tractor antilock assembly is designed

to improve vehicle stability by reducing wheel lock-up during
aggressive braking. Like the MC-10

™

 antilock assembly that

it replaces, the MC-11

™

 tractor antilock assembly is a

one-channel system–it uses one modulator. And the system
can control single or tandem axles. The antilock assembly
mounts to the vehicle frame and usually replaces the drive
axle service relay valve.

The MC-11

™

 tractor antilock assembly consists of an EC-11

™

electronic controller and an M-12

™

 modulator. The EC-11

™

controller houses the electronics that regulate the antilock
system. The electronics are protected by a self-healing
silicone compound. The EC-11

™

 controller contains a

diagnostic window and reset switch, and its 14 pin connector
is the electrical link to the rest of the antilock system. (See
Figure 2.) The controller mounts to the modulator with four
cap screws, and it is electrically connected to the modulator

with a four-pin connector. The M-12

™

 modulator has two

components: solenoids, which rapidly apply and exhaust
air during an antilock stop, and a standard relay valve. (See
SD-13-4772 for more information on the M-12

™

 modulator.)

The air connections for the MC-11

™

 tractor antilock assembly

are as follows:

Supply
(to reservoir)

SUP

Delivery
(to brake actuator)

DEL

Control
(to rear service brake valve delivery)

CON