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Old 08-28-2007, 09:46 AM   #9 (permalink)
jimmy
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Join Date: Apr 1999
Location: Justin,Texas, Republic of TEXAS (USA)
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Re: What Happens When....... Brake Controller Question

locking up random axles on that trailer is very unlikely to have anything to do with the controller. There is no way the current would be unequal to all the magnets unles there is resistance in wiring and then it would always be that affected wheel brake set that does not lock.

The connection of three axles through the equalizer link (piece that ties the leaf springs together) is usually the culprit combined with unloaded trailer. The torque of back axle forces the front of spring down and that rotates the equalizer annd lifts the back of the spring in front and unloads that tire and makes it lock up easily.
Improperly adjusted brakes can make it worse.
The trailer is probably heavily sprung and that adds to the condition also.
When it is loaded does the random wheeel locking still occur?

Use of 2 axle controller on that three axle trailer would, if anything, decrease the chances of wheel lock.
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2006 F450 CC Hauler bed 4x2 6.0 L Pstroke/Torqshift, Lariat, 4.30 r/a.
2006 F350 Lariat CC Dually 4X2, 6.0 TQShift 4.10 LS, STOCK.
36 feet on the floor Elite/Outlaw LQ horse trailer.
36 foot double tandem axle flatbed trailer.
36 foot Sooner 6 horse large dressing/ mid tack.
15 horses with good balance from being hauled behind a P'stroke.
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