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Product Options

The Haldex Modular Dolly System (HMDS) with Brake Monitoring System (BMS) was designed to 
be used on Single Axle Dollies.

Safety First

This manual describes the correct installation process for the Haldex Modular Dolly System (HMDS) 
with Brake Monitoring System (BMS). Care must be taken during each phase of the installation in 
order to ensure the system is installed and working properly. 

Please follow your company’s safety procedures at all times when installing this equipment. 
Be sure that you understand all instructions before you begin. 

Remove all air pressure and electrical power from the brake system before beginning work.

Handling Requirements

The Haldex Modular Dolly System (HMDS) with Brake Monitoring System (BMS) requires proper 
handling prior to and during installation. The HMDS should NEVER be lifted by way of tubing, 
electrical cables or any components. Lifting MUST only be done by way of the panel itself. Failure 
to do so may result in loose components and subsequent leakage, leading to panel function 
degradation or failure.

Questions?

If you have any questions on this product or any of the innovative products offered by Haldex, 
contact your local distributor for complete details. Technical Service or Troubleshooting help can 
be obtained by calling Haldex Technical Services Department at 800-643-2374, Press 2.

Important Notices

The products described within this literature, including without limitation, product features, 
specifications, designs, availability and pricing are subject to change by Haldex and its subsidiaries at any 
time without notice. This document and other information from Haldex, its subsidiaries and authorized 
distributors provide product and/or system options for further investigation by users having technical 
expertise. It is important that you analyze all aspects of your application and review the information 
concerning the product or system, in the current literature or catalog. Due to the variety of operating 
conditions and applications for these products or systems, the user, through their own analysis and 
testing, is solely responsible for making the final selection of the products and systems and assuring that 
all performance, safety and warning requirements are met.

Haldex Modular Dolly System (HMDS) with Brake 

Monitoring System (BMS) for Single Axle Dollies

Installation/Service Guide  (L31298W)

Summary of Contents for L31298W

Page 1: ...INSTALLATION SERVICE MANUAL Haldex Modular Dolly System HMDS with Brake Monitoring System BMS For Single Axle Dollies L31298W Patent Pending...

Page 2: ...questions on this product or any of the innovative products offered by Haldex contact your local distributor for complete details Technical Service or Troubleshooting help can be obtained by calling...

Page 3: ...duced with the written permission of Haldex Section Page Haldex Modular Dolly System HMDS with Brake Monitoring System BMS for Single Axle Dollies Installation Service Guide L31298W PAGE 1 Additional...

Page 4: ...Red Push Pull Valve Supply Line 3 8 Tubing Red Reservoir Line 3 8 Tubing Blue Delivery Line 3 8 Tubing Black Air Tank Supply Line 5 8 Tubing Black Air Bags Supply Line 3 8 Tubing Red Leveling Valve Su...

Page 5: ...1 1 4 Long Hex Bolt Nylon tubing DOT 1 4 3 8 and 1 2 Installed 5 8 tubing provided by installer Included Rubber Service Brake Hose clamp Assembly NOTE See L31250W Manual for Brake Monitoring System BM...

Page 6: ...lation Service Guide L31298W PAGE 4 Haldex Modular Dolly System HMDS Components Rear Pressure Protection Valve PPV with One way Check Reservoir Purge Valve RPV Pressure Protection Valve PPV Supply to...

Page 7: ...e NOTE To avoid damage to power connector use provided zip tie in this location to secure power connection to ITCM ECU Blue Out Blue In Red In Red Out 3 8 Tube 1 2 Tube 1 2 Tube 1 2 Tube 3 8 Hose 4 Pl...

Page 8: ...nections either tubing or electrical MUST be made CORRECTLY for proper function of the Haldex Modular Dolly System HMDS Failure to do so could result in injury or death Air Reservoir 1488 cu in min 5...

Page 9: ...NG External connections either tubing or electrical MUST be made CORRECTLY for proper function of the Haldex Modular Dolly System HMDS Failure to do so could result in injury or death This connection...

Page 10: ...itoring System BMS for Single Axle Dollies Installation Service Guide L31298W PAGE 8 5 1 4 Channel Bracket 3 8 16 UNC X 1 1 4 Long Hex Bolt Grade 5 28 32 ft lbs 3 8 Flat Washer 6 3 8 Lock Washer 6 3 8...

Page 11: ...aldex Modular Dolly System HMDS with Brake Monitoring System BMS for Single Axle Dollies Installation Service Guide L31298W PAGE 9 Haldex Modular Dolly System HMDS End of Line and PM Tests Mounting Br...

Page 12: ...ergency IN gladhand pressure Service Chambers should park Step 2 Verify Dolly ABS Power Apply 12 Volts DC to the Blue ABS Pin 7 on the 7 Way Connector and verify the external mounted Dolly ABS Lamp go...

Page 13: ...The Brake Monitoring System BMS alarm will shut off NOTE If the Brake Monitoring System BMS alarm continues to sound after completing Step 2 refer to Brake Monitoring System BMS Installation Service...

Page 14: ...with Reservoir Purge Valve RPV Step 2 Start engine or use shop air to build system pressure in reservoir air tank to 110 120 PSI Step 3 Check for any air leaks Step 4 Set parking brakes or remove eme...

Page 15: ...Haldex Modular Dolly System HMDS with Brake Monitoring System BMS for Single Axle Dollies Installation Service Guide L31298W PAGE 13 Notes...

Page 16: ...ckholm Stock Exchange Haldex has annual sales of approximately 3 9 billion SEK and employs about 2 200 people haldex com Haldex Brake Products Corporation 10930 N Pomona Avenue Kansas City MO 64153 PH...

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