ALTRACO ELECTRONIC DISC BRAKE CALIPER Spécifications Page 1

Revised 08-00$2.50HDB 640SCL 46SCL 53SCL 35Dry Disc Brake CalipersMaintenance Manual 4Y

6IdentificationAn assembly number located on the side of thecaliper that is opposite from the mounting plateidentifies older assemblies. An identifica

7Section 2Removal and DisassemblyWARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or service.R

8Section 2Removal and Disassembly4. Remove the pistons from the side of thehousing opposite the mounting plateaccording to the following procedure:A.

9Section 2Removal and Disassembly11. Inspect the pistons and bores for scratchesand rust. Use a fine emery cloth to removesmall scratches and rust.•

10Section 3InspectionWARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or service.Inspect Parts

11Section 3Inspection6. Inspect inlet fitting and O-ring for damage.Replace O-ring if necessary.7. Inspect the linings as described earlier in thiss

12Section 4Prepare Parts for AssemblyWARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or servi

13Section 5Assembly and Installation3. Install a new dust seal into the top groove ofthe bore. Do not use silicone grease on the dustseal. Figure 5.1

14Section 5Assembly and InstallationLiningsCAUTIONReplace the linings on both brakes of a singleaxle at the same time. Use Meritor parts. The useof no

15Section 5Assembly and InstallationRemove Air from the System(“Bleed” the Brakes)WARNINGYou must bleed the brakes to remove all air fromthe system, w

Service NotesBefore You BeginThis manual provides installation and maintenanceprocedures for Meritor’s HDB 640, SCL 35, 46 and53 Series dry disc brake

16Section 6TroubleshootingBrake Does Not ApplyCondition Possible Causes CorrectionThere is no pressure to 1. Empty fluid reservoir 1. Fill the reserv

17Section 7SpecificationsTorque ChartWear Dimensions*Hydraulic Fluid**See fluid and specification recommendations of equipmentmanufacturer.Component T

Notes

Notes

Notes

Information contained in this publication was in effect at the time the publication was approved for printing and is subject to change without notice

Table of ContentsAsbestos and Non-Asbestos Fibers Warnings...iExploded V

iNON-ASBESTOS FIBERS WARNINGThe following procedures for servicing brakes are recommended to reduceexposure to non-asbestos fiber dust, a potential ca

1HDB 640Base Model: HDB 640Model: HDB 640 1SequenceItem Description Quantity Number*1 Housing 1 001002 Back-up Ring 6 001103 O-Ring 6 001204 Dust Seal

2SCL 35 SeriesBase Model: SCL 35Models: SCL 35 1SCL 35 5SequenceItem Description Quantity Number*1 Housing 1 001002 Back-up Ring 6 001103 O-Ring 6 001

3SCL 46 SeriesBase Model: SCL 46Model: SCL 46SequenceItem Description Quantity Number*1 Housing 1 001002 Back-up Ring 6 001103 O-Ring 6 001204 Dust Se

4SCL 53 SeriesBase Model: SCL 53Models: SCL 53SCL 53 1, SCL 53 2SequenceItem Description Quantity Number*1 Housing 1 001002 Back-up Ring 6 001103 O-Ri

5DescriptionThe HDB 640, SCL 35, 46 and 53 Series dry discbrake calipers are intended only for service use onhydraulic brake systems. All calipers mou