1
Supply Port
(Casting has
“1, SUP”)
Exhaust Port
(Body has
“3, EXH”)
Supply Port
(Casting has
“1, SUP”)
Exhaust Port
(Body has
“3, EXH”)
Electrical
Connector
Mounting Holes
(.33" Diameter
Through Body)
Alternate Push-to-
Connect Version,
Showing Optional
Packard Connector
Electrical
Connector
Delivery Port
(Casting has
“2, DEL”)
Bendix
®
M-40HF
™
Modulator
(Height = 4.75”)
Bendix
®
M-40QR
™
Modulator
(Height = 3.75”)
SD
-13
-4
95
8
DESCRIPTION
The Bendix
®
M-40QR
™
(quick release) and M-40HF
™
(high
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.
Bendix
®
M-40QR
™
& M-40HF
™
Pressure Modulator Valves
Figure 1 -
M-40QR
™
& M-40HF
™
Pressure Modulator Valves
Bendix
®
M-32
™
Modulator
Figure 2 - Previous Bendix
®
M-32
™
Modulators
OE and Service New Bendix
®
M-40QR
™
and M-40HF
™
modulator valves
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
®
product.
Bendix
®
M-32QR
™
Modulator
