Parts Needed to Replace 2000 lb Axle and Suspension

Question

Question:

I need new suspension.. Have this in my cart: 20545I-EZ-72-15 axle w/hubs SP-124275 leafs K71-385-00 springs overkit Is this all compatible? If not, what should I get for the ubolt axle swap? Also, do you sell the spring/shackle bolts?

asked by: Robb M

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Expert Reply:

You're certainly on the right track, with the exception of the leaf spring U-bolt kit. The # K71-385-00 is meant for a 3500 lb axle, and wouldn't fit your 2000 lb axle correctly. The U-bolts would be too large. If you want to keep the axle mounted under the leaf springs, you'll just need the # APUBR-10 U-bolt kit.

If you were wanting to mount the axle beam above the springs which would lower the trailer's ride height by roughly 2 inches, you'd use the same # APUBR-10 bolt kit as well as two # TRSS175 replacement spring seats. You'd need to remove the existing spring seats from the axle beam using an angle grinder (being sure not to damage the axle tube) and having two new ones welded onto the other side of the axle. Because trailer axles are arched in order to keep the correct wheel camber, you won't just be able to flip the axle end for end.

We do sell shackle bolts as part # 166081 or # 126B2 for a wet bolt. I'd also recommend replacing the shackle straps as well. You'll need to measure the size you currently have, I'll link you to the straps we offer.

expert reply by: Mike L

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Answer 1

I can help you determine the right replacement double-eye leaf springs for your Gulfstream 19RBS Vintage Cruiser travel trailer, though we don't have any way of knowing what specific ones you need. It's pretty easy though, as all you'll…

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Answer 2

You will want to choose the diameter size of U-Bolts you need by the axle type (round, square) and the axle diameter. The Redline 2 Inch Square Trailer U-Bolt, part #SP01-160, you have referenced is for a 2 inch square axle. It is a 9/16 inch…

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Answer 3

There is no specific torque rating for shackle bolts. You'll want to ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding from the nut. Make sure that the bolt you're using has a…

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Answer 4

The longest leaf springs we offer are the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles, part #SP-210275. These springs measure 27 inches eye-to-eye and are designed for axles up to 3,500 lbs. I have attached a photo of this spring that has the…

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Answer 5

There usually is not a bushing in the upper bolt on the shackle links. When tightening the bolts on the shackle link you will want to get them tight but you do not want to over tighten them. Being tight will not keep the suspension from working…

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Answer 6

There actually is not a specific torque rating for shackle bolts like the Redline #166081 that you referenced. You just want to make sure that the bolt is long enough so that when installed you have at least 2 threads protruding from the nut. This…

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Answer 7

I do understand your concern with the potential of a slightly longer thread length on the Shackle Bolt #166081 causing the shackle strap to sit right on the threads. The fact is though that the shackle positioned there as opposed to the unthreaded…

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Answer 8

It looks like you might be asking about a few different torque specs so I'll address all of them separately. For a trailer axle spindle nut like part #165686 you will need to run the spindle nut down until there is no more side-to-side play in…

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Answer 9

If you will be using 9/16 inch fasteners then torque them down to 110-114 foot pounds. If using 1/2 inch torque them to 76-78 foot pounds. You can find all sorts of different torque specs for the same size bolts or nuts and they will all be around…

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Answer 10

There is not a specific torque requirement for bolts like the Shackle Bolt #166081. You'll want to make sure that you're using a lock nut and ensure that the bolts you use are long enough so that when installed you will have at least 2…

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Answer 11

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 12

For a 9/16 inch shackle bolt such as #TRFA73Z916DLNZ you will want 65 to 95 foot pounds of torque. Provided that you are within that range you won't over-torque the nuts. A little bit of play is expected but large gaps could be taken up using…

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