Replacement Trailer Leaf Springs for Tandem Axle Hash Travel Trailer

Question:

Suspension kit AP233 uses an equalizer that is 5 5/8 long. Its chart indicates a hanger spacing of 29 1/2 and an axle separation of 33. Kit AP3 uses an equalizer that is 7 3/4inch long. Its chart also indicates a hanger spacing of 29 1/2 and an axle separation of 33 1/2. Both charts list springs that are 25 1/4inch 26inch when loaded. Are these charts correct ? Why do equalizers that differ in length by 2 1/8inch use the same hanger spacing? My real question follows: My Nash 22foot 4inch travel trailer has hanger spacing of 27 1/2. The hangers are all 4inch high. The OEM setup uses the 5 1/2inch Equal-Flex. The springs are broken or damaged so I can not get a good measurement. If I use the 23 1/4inch 1724 springs, can I use the EZ-Flex 5 1/2inch suspension kit?

asked by: Owen F

Expert Reply:

Hanger height and spacing, spring length, shackle length and equalizer size are all variables in a trailer suspension and it is possible that the same length springs can fit in more than one application. The dimensions on the included charts are just meant as a guide.

You should have no trouble at all using the 5-5/8-inch E-Z Flex Heavy Duty Rubber Suspension System # K71-652-00 since it has an operating width range of 5-1/4- to 6-1/4-inches. But you may still need to re-position your hangers to keep everything in proper alignment.

You'll need to match the weight capacity, width and length of new springs. Springs can and do stretch with age and use. Remove and measure one of your existing springs to get its eye-to-eye measurement and keep in mind that your measurement will likely be overstated by anywhere from 1/4-inch to 3/4-inch. For example, if you measure 26-inches from eye-to-eye your spring's original length was likely 25-1/8-inches such as # e54SR which is rated for 3500-lb axles.

expert reply by: Adam R