Frequently Asked Questions

Q) What is causing one "STAGE" to stay on ?
A) If there isn't a 12 Volt + signal on the input side of the control box, then the control box is faulty.

Q) What is the Air Gap supposed to be on a retarder ?
A)  The proper air gap depends on the model of the retarder a Focal DK model is between .054-.064 thousandths of a inch and .041-.053 for a AXIAL (AC82-45) series.

Q) How can I identify the type and serial number of my retarder ?
A) Both the AC and FOCAL retarders have the model numbers and serial numbers etched on the stator frame. It will appear on the bottom for a AC series and top for the FOCAL series. Click Here for:  FOCAL ID PICTURE , AC PICTURE ID

Q) Why doesn't the TELMA work since the ABS light has come on ?
A)  The TELMA is designed in such a fashion as to not allow operation whenever a ABS Event is sensed.

Q) Why can't I find the grease tube on the TELMA ?
A) All the newer TELMA brakes since 1998 have a greaseless permanently sealed bearing construction.

Please download our Quick Reference Guide for other helpful information.

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