Disc Brake Conversion For 2016 Grand Design GD Momentum With Lippert 7000 lb Triple Axle

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Question:

Good Day, 2016 Grand Design GD Momentum w/ Lippert 7000# axles triple axle We know that there are issues with the standard brake system used by Lippert. Grease issues being number one, but stopping a 22k lb. 5th wheel is another. Ive seen other owners convert to disc brakes. First -what info do you need to get the correct parts? Can you put together a list of items to make it a complete package? Last, upgrading the 3 axle suspension- it has the equaflex pivots now which I believe have the plastic bushings vs. bronze. What will I need for that too?

asked by: Jack C

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Expert Reply:

For your Lippert 7,000 lb axles on your 2016 Grand Design GD Momentum triple axle trailer, I recommend the Kodiak Disc Brake Kit - 13" Hub/Rotor - 8 on 6-1/2 - E-Coat - 7,000 lbs # K2HR79E. These fit the industry standard number 42 spindles. For this you will need the inner bearing # 25580 and outer bearing # 02475 along with oil seal # 10-63. I recommend you check the bearing diameters to make sure they match your spindles.

For your disc brakes you will need a different actuator capable of higher psi. For this system including your brake lines and breakaway, I recommend the HydraStar Electric-Hydraulic Actuator w/ Line Kit for Disc Brakes - 1,600 psi # CAR-HBA16-2. To add the extra brake lines, I recommend the Hydraulic Line Kit, 3rd Axle - Drum and Disc # 9579-01.

For your suspension bushings I recommend the bronze bushings # D014-077-00. These work best with the Wet Equalizer Bolt with Locknut and Grease Zerk for Double-Eye Springs - 3" Long # 126B2, and make a really nice system.

expert reply by: Jason S

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Answer 1

Your trailer has 7k Lippert axles on it so the disc brake kit you would need is the three sets of #K2HR712D for the disc/rotor and caliper kits. This won't be super cheap but it will give you the best option for converting to disc. For an…

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Answer 2

HydraStar has a great kit for upgrading trailers with tandem Lippert 7k axles with the HydraStar Disc Brake Kit w/ Actuator for Tandem Axle Trailers #HSE7K-T1 or for triple axles #HYD54FR. These kits come with all the parts you'd need but most…

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Answer 3

I reached out to Hydrastar and they are very familiar with disc brakes on your 2018 Grand Design Momentum toy hauler. They said Grand Design typically gets their axles with 9/16" studs of which we only have the Hydrastar Disc Brake Kit w/…

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Answer 4

Hello, Phil. Yes, the bolts that go into the adapters at the end of the arms should be torqued. It looks like those are 5/16" grade 5 bolts so they should be torqued to 18 ft lbs. I have included the torque chart below for your reference.

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Answer 5

There isn't a way to order the kit part #APT8 with the bolts #126B2 so you'd have to order the wet bolts in addition to the kit and swap them out.

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Answer 6

Thank you for the image of the axle tag for your Dexter D80 8,000LB axle. This will require the 10-36 Grease Seals #RG06-070 you found. Here is a list of the other components your axle uses should you want to replace or find any parts worn. Inner…

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Answer 7

You'll need the CE Smith U-Bolt Kit #CE23002, 9/16" Bolts like part #126B2 and then one of the following leaf spring sizes: - 23-1/8" Long #e59SR - 25-1/8" Long #e68SR - 27" Long #e97SR To get the correct leaf spring length…

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Answer 8

Yes, we do have the wet equalizer bolts you can use with the Equa-Flex Cushioned Equalizers. You will need #126B2. I have included a picture showing a typical installation of the bolts being used to secure the springs to an equalizer. Installation of…

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Answer 9

Yes, there is an upgrade for the Dexter Curved Equalizer part #K13-142-02 that you have on your trailer now and that is the Equa-Flex Cushioned Equalizers part #LC314336 which have a rubber core that minimizes back-and-forth movement in addition to…

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Answer 10

Yes, our Dexter leaf spring part #DX74XR is the same as the part number 072-079-00. This is a 7-leaf spring for an 8,000 lb trailer axle that is 24-7/8 inches.

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Answer 11

It really just depends on what you are looking to get out of the bushings. Bronze bushings, like part #K71-291-00, will last longer but are more noisy and it is recommended to use wet bolts like part #126B2 to keep them lubricated. Nylon bushings,…

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Disc Brake Conversion For 2016 Grand Design GD Momentum With Lippert 7000 lb Triple Axle

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