Should the Trailer Suspension Rear Hanger be Closer or Farther From the Axle than Rear Spring Eye

Question

Question:

The bolt hole on the rear hanger is off center by about 1/4, old one was same but I didnt notice which way it was installed. Should the hanger be installed with the hole closer to the front of trailer or closer to the rear?

asked by: Don

0

Expert Reply:

The rear hanger should be slightly closer to the axle (forward) of the trailer. If you look at the drawing on the product page for Single-Axle Trailer Hanger Kit for Double-Eye Springs, # APS1, you will see the rear hanger is more forward than the center of the rear eye of the spring. The shackle, then, is at a slight angle with the top more forward than the bottom.

I have included a link to our double-eye trailer suspension FAQ article that contains a lot of good information on trailer suspension.

expert reply by: Michael H

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Answer 1

For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind…

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Answer 2

In theory a single leaf spring like the part #e46SR that you referenced is going to have a better ride quality since there isn't any inner leaf friction created by the individual leaves of a larger spring pack. Depending on if your current…

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Answer 3

Equalizer bolts, like the Redline Wet Equalizer Bolt with locknut and grease zerk, #126B2, should be torqued to yield. Equalizer bolts are not given a specific torque rating because they should allow some movement of the equalizer. If they are…

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Answer 4

The shackle bolts used between the springs and hangers do not require a specific torque rating because tightening the shackle bolts too much will squeeze the shackle straps against the leaf springs, and the whole suspension system will bind and…

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Answer 5

On the Redline Rear Hanger, part #30-20, which is the rear hanger included with kit #APS1, it is welded to the trailer with the side marked top, facing the outside of the trailer with the word top showing. So the U-shape part is what gets welded to…

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Answer 6

If you check out the picture I attached you can see that the knurls of the wet bolts like the part #126B2 are supposed go through the shackle straps and not the bushing. I believe the issue you are having is you are trying to force the knurls…

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Answer 7

The shackle straps included in the #APS1 trailer hanger kit will bolt to the outside of the rear hangers, which measure 9/16 of an inch from the top to the center of the bolt hole. I am including some links to videos and FAQs with information that…

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Answer 8

Bushings do not always have to be used. Springs typically have bushings or they will use wet bolts depending on which part of the suspension system it is but not always. The bushings limit the wear on the suspension components. There are just…

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Answer 9

Most trailer leaf springs will have a bushing in the eyes of the spring. It is interesting that the install video we have for the wet bolt part #126B2 that you referenced does not have a bushing involved at all. In reality all that really matters…

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Should the Trailer Suspension Rear Hanger be Closer or Farther From the Axle than Rear Spring Eye

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