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Bendix
M-40QR
®
Bendix
M-40QR
®
™
Modulator
(Height = 3.75")
Exhaust Port
(Body has
"3, EXH")
Figure 1 - M-40QR
& M-40HF
™
DESCRIPTION
The Bendix
M-40QR
(quick release) and M-40HF
®
™
flow) pressure modulator valves (PMVs) are high-capacity,
on/off air valves that incorporate a pair of electrical
solenoids for control. See Figure 1. The solenoids provide
the electro-pneumatic interface between the vehicle's
electronic control system and the air brake system. For
example, the PMV is used to control the braking function
of service actuators during antilock activity.
& M-40HF
Pressure Modulator Valves
™
™
Delivery Port
(Casting has
"2, DEL")
Supply Port
(Casting has
"1, SUP")
Electrical
Connector
Mounting Holes
(.33" Diameter
Through Body)
Pressure Modulator Valves
™
Bendix
M-40HF
®
Modulator
(Height = 4.75")
Exhaust Port
(Body has
"3, EXH")
(high
™
Bendix
®
Modulator
Figure 2 - Previous Bendix
™
Supply Port
(Casting has
"1, SUP")
Packard Connector
Electrical
Connector
OE and Service New Bendix
a n d M - 4 0 H F
m o d u l a t o r v a l v e s
™
manufactured after February 2014,
contain two parallel ribs on each side of
the Supply and Delivery ports as shown
here. These ribs identify these modulators
as a genuine Bendix
product. If the OE
®
or Service New valve was manufactured
after this date and does not contain these
ribs, it is not a genuine Bendix
M-32QR
Bendix
™
Modulator
M-32
Modulators
®
™
Alternate Push-to-
Connect Version,
Showing Optional
M-40QR
®
™
product.
®
M-32
®
™
1
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Table of Contents
Related Manuals for BENDIX M-40QR
Summary of Contents for BENDIX M-40QR
- Page 1 Bendix product. If the OE ® or Service New valve was manufactured after this date and does not contain these ribs, it is not a genuine Bendix product. ® Figure 1 - M-40QR & M-40HF Pressure Modulator Valves ™...
-
Page 2: General Safety Guidelines
® ™ under or around the vehicle. When working in the engine Bendix M-40QR modulator has a bias valve to provide an compartment, the engine should be shut off and the ignition internal quick-release function. key should be removed. Where circumstances require that... - Page 3 If the air system Driver is fully charged – and the service brake pedal is depressed during ignition – the modulator creates a single, sharp audible “chuff” of air pressure. Bendix ECUs will perform Left Left Steer Left Drive...
-
Page 4: Operation
ANTILOCK OPERATION If equipped with a Bendix EC-60 (or later) advanced ® ™ controller, following the completion of the second round GENERAL of PMV & TCV Chuff Tests, the controller (if configured to do so) will perform a test to cross-check the trailer PMV See Figure 6. - Page 5 Bendix brand unit, available at any authorized parts ® antilock controller. When a solenoid coil is energized, outlet.
-
Page 6: Leakage Test
7. The leakage at the exhaust port of most Bendix components, including the M-40 modulators, should not ™... -
Page 7: Technical Information
Modulators ® ™ ™ Bendix Bendix ® ® M-40HF M-40QR ™ ™ Modulator Modulator Packard Bayonet Valve Function Terminal Terminal Function Port Name Name Supply Source Delivery Hold Exhaust Exhaust Figure 9 - Bendix M-40QR & M-40HF Modulators DIN Symbol... - Page 8 ABS system becoming inoperable in whole or in part. Log-on and Learn from the Best On-line training that's available when you are 24/7/365. Visit brake-school.com. SD-13-4958 Rev. 001 © 2018 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 10/18 • All Rights Reserved...