Is Dexter Heavy Duty Suspension Upgrade Kit # K71-358-00 Zinc Coated

Question

Question:

Is this suspension kit suitable for Marine salt water use ? I have a 1995 Tracker boat trailer with a 3500 lb 2 3/8inch diameter axle. I would normally seek a galvanized or zinc plated kit, but wonder about the plating on this kit. The off-the-shelf unplated hardware lasted only 3 years.

asked by: Jack C

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Expert Reply:

The shackles of the Dexter Heavy Duty Suspension Upgrade Kit # K71-358-00 are zinc coated but the bolts are not. For zinc coated bolts as well you'd want the # TRFA73Z916DLNZ.

expert reply by: Jameson C

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Answer 1

If your trailer suspension seems to be in good shape, other than the broken equalizer, then you do not have to replace both sides if you do not want to. The best way to find the correct replacement equalizer is to measure the shackle bolt holes and…

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Answer 2

Hey Corey, Bolt grades for leaf spring suspensions can range from grade 5 to grade 8, with the consensus being that grade 8 is the most preferred. For a 3,500lb axle the Zinc Shackle Bolt with Locknut #TRFA73Z916DLNZ would be a compatible…

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Answer 3

I do have all of the parts you need but unfortunately they are not offered in an all inclusive kit. Instead, you would need to purchase them separately. For this, you can use part #TREQ356 for the equalizer, part #115052 for the shackle strap, and…

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Answer 4

We do have an option for your 7k axles, but none with 7 leafs on them. At the end of the day the most important part is the appropriate capacity and length, since the leafs can be different thicknesses and grades of steel. With that said, if your…

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Answer 5

The Zinc Shackle Bolt with Locknut for Double-Eye Springs - 3" Long #TRFA73Z916DLNZ is a grade 5 bolt. Your setup as described is a standard setup for leaf spring hangers and double eye leaf springs. The #166081 is made by the same manufacturer…

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Answer 6

I recommend using the Never Fail Bushings - 9/16" Inner Diameter, 11/16" Outer Diameter - 1-3/4" - Qty 14 #LC279685. For 1-3/4 inch springs you will want the Shackle Bolt with Locknut for Double-Eye Springs - 3" Long #166081.…

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Answer 7

Because of its Zinc finish, the #TRFA73Z916DLNZ shackle bolt would definitely do a better job resisting corrosion than the #166081 bolt with its raw steel finish.

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Answer 8

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Answer 9

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

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Answer 10

There is no specific torque rating for shackle bolts. Basically for the middle bolt there should be enough free play in the shackles to allow them to move. Tightening the shackle bolts too much will squeeze the shackle straps against the leaf springs…

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Answer 11

Since Grand Design is kind enough to list certain parts for their trailers I can confirm you have a 33" wheelbase on your 2020 Grand Design Transcend 27BHS. This means the MORryde Rubber Equalizers #MR87ZR will fit your trailer. Although I'm…

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Answer 12

When replacing shackle straps they should be the same length as the ones that were previously on your tandem axle trailer; replacing them with longer straps will result in additional play in your trailer suspension which could lead to additional wear…

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Is Dexter Heavy Duty Suspension Upgrade Kit # K71-358-00 Zinc Coated

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