BENDIX TCH-013-011 User Manual
Technical Bulletin
Bulletin No: TCH-013-011 Effective Date: 12/14/05 Cancels: N/A Page: 1 of 1
Subject: Bendix Modulator Changeover
This Bulletin is to alert vehicle technicians repairing or upgrading Bendix® ABS modulators, that it may be necessary
to replace both modulators on the axle to maintain the vehicle’s ABS operation to specifications.
Please see the chart below for the applicable replacement guidelines.
Modulator
being replaced:
M-21™ Modulator
M-22™ Modulator
M-30™ Modulator
Replacement with an
M-30™ modulator
It is necessary
to replace both
modulators on the
axle with M-30™
modulators
It is necessary
to replace both
modulators on the
axle with M-30™
modulators
It is necessary
only to replace the
modulator with an
M-30™ modulator
Replacement w
ith an
M-32QR™ modulator*
It is necessary
to replace both
modulators on the
axle with M-32QR™
modulators
It is necessary
to replace both
modulators on the
axle with M-32QR™
modulators
It is necessary only to
replace the modulator
with an M-32QR™
modulator
Replacement with an
M-32™ modulator
It is necessary
only to replace the
modulator with an
M-32™ modulator
It is necessary
only to replace the
modulator with an
M-32™ modulator
It is necessary
to replace both
modulators on the
axle with M-32™
modulators
Bendix® M-32QR™ and M-32™ modulators should be replaced like for like.
Please note that due to the critical safety function provided by ABS modulators, Bendix does not assume
responsibility for antilock system reliability or performance issues in situations where a substitute non-Bendix® ABS
modulator valve is used on a vehicle equipped with Bendix® ABS. In addition, the use of alternate components
in place of genuine Bendix® components could lead to rejection of ABS warranty claims.
For more information on Bendix modulators, see Service Data sheets:
M-21™ and M-22QR™ modulators: SD-13-4793
M-30™ modulators: SD-13-4830
M-32™ and M-32QR™ modulators: SD-13-4870
Free downloads are available on www.bendix.com.
* All M-32QR™ modulators except some p/n 5011281 (Bluebird) have the shorter exhaust port.
© 2005 Bendix Commercial Vehicle Systems LLC 12/05. All Rights Reserved. Printed in U.S.A.
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