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Complaint Rating:  86 % with 7 votes
86% 7
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PJ Trailers
United States
In October, 2010, I experienced a significant problem with a PJ Dump Trailer. My issue is with the engineered (or lack of engineered) design of the trailer.

Typically, a hydraulic system is designed with a bypass pressure relief valve that is designed to be the weakest link of the hydraulic system. The relief should be set to relieve the hydraulic pressure [sending the fluid back to the reservoir] prior to the hydraulic ram exerting enough force to destroy structural members of the system. In other words, the pressure relief valve is much like the fuse in an electrical system. You could, but you should not, put a 50 amp fuse in an electrical system where some components are only designed for 20 amps.

The problem that I encountered is the force exerted by the hydraulic ram caused the the trailer's hydraulic structural sub-assembly to fail before the pressure relief valve activated. When contacted, PJ questioned the weight in the trailer to excuse the failure. Certainly, the weight, as well as the location of the weight (i.e., forward or aft) within the trailer bed affects the force required to raise the dump bed. In the field (i.e., job location) a person generally does not have the ability to weigh the load or calculate the force required to dump the load. In this case the load was small in volume relative to the size of the trailer and the weight did not inflect any damage to the trailer. However, weight or any other malfunction in raising the bed is irrelevant to setting the pressure relief valve to provide protection for all hydraulic structural members relative to their designed strength. In fact, such an event is the very purpose of having a pressure relief bypass. It is my understanding that PJ procured the hydraulics and scissor lift from KTI Hydraulics and the pressure relief setting was as provided. There was no damage to the hydraulic rams or scissor lift. I believe the problem lies with PJ's purchase specifications not requiring a specific [lower] pressure relief setting relative to their application of the procured product. This failure resulted in a consumer cost of $1741.00. It is my understanding that PJ provided the dealer (Riverside Boot and Saddle) replacement parts at a reduced price and the dealer fixed the trailer at a reduced labor cost. For those price reductions I am appreciative, but it appears that proper engineering could have prevented the failure and all cost. I believe PJ should have stood behind their product 100% and should address the issue with all trailers.

Specifically, the trailer in use was the PJ Tandem Dual Dump with the 20' bed.
Complaint comments Comments (1) Complaint country United States Complaint category Products & Services
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 3rd of Oct, 2014 by    -1 Votes
I bought a pj trailer from a local dealer, pete's trailer, the trailer looked nice, 14 ft x 83 inches with a fold down gate that also has ramps for better strength. The problem is that my 4wheeler broke loose and rolled back bumped into ramp and bent the latch pins. We straightn them but they still look bent, I asked my local dealer if they would replace them and was told I'd have to buy them, I had them order them and then I called pj, they also refused to stand in back of them. When the dealer got them he called me, I went to pick them up, but another surprise, the pins were not the same length, one was longer then the other, the welds looked like a beginners, and they were bare steel, not powdercoated like the ones that came with trailer. I would not buy from PJ'S again they do not stand in back of nothing.. The dealer wanted $26.00 for those junk pins. I had a steel sales place make me new ones, I painted them with duracoat all for less then $10.00. L.Olson

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