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New Holland Skidsteer Forum
LS185b Hydraulic Brake Engaging Randomly
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<blockquote data-quote="Jelcoat" data-source="post: 123837" data-attributes="member: 22684"><p>Well I believe I found the problem. I spliced the test light into each wire in the "safety interlock circuit" one at a time in the order that the circuit progressed until I got to the hydraulic brake coil. The light initially worked when I pushed the brake release button on the dash but went out shortly thereafter when the brakes locked up. Because I had just installed a new coil on the brake valve I assumed that the coil was working properly and started running the start sequence with a different accessory fuse removed each time I ran the test until the test light stayed on and the brakes wouldn't lock up. I found the source of the problem on my third try. </p><p> Several years ago I installed an aftermarket cab heater. While contemplating where I should run the power for it from I located a pigtale in the area of the cab fuse box. It's a heavy gauge orange wire with a flat blade fuseable link prewired into it that isn't part of the fuse block. It was convenient so I used it. I ran a wire from the pigtale to an aftermarket rocker switch that I installed in a blank slot in the dash panel. I then ran a wire from the switch to a two speed fan controller in the heater. What's interesting is that the interlock circuit only tripped when the heater blower was set to low. I would always set the heat on high when I warmed up the machine in the winter. I would switch it to low after it started getting warm in the cab. </p><p>I assume that the blower is going bad and somehow sending a short back through the pigtail that trips the safety interlock circuit locking up the brake.</p><p>The good news is that I can still run the heater on high and open a window when it gets too hot inside. </p><p>I have searched the internet to see oif I can find out what accessory that O.E.M. stock installed pigtail is there to supply power to. My concern is that it was meant for an accessory that required to be wired into the safety interlock circuit. Do you gave any idea what that pigtail is supposed to provide power too?</p><p></p><p>Thanks for the help,</p><p>Jim</p></blockquote><p></p>
[QUOTE="Jelcoat, post: 123837, member: 22684"] Well I believe I found the problem. I spliced the test light into each wire in the "safety interlock circuit" one at a time in the order that the circuit progressed until I got to the hydraulic brake coil. The light initially worked when I pushed the brake release button on the dash but went out shortly thereafter when the brakes locked up. Because I had just installed a new coil on the brake valve I assumed that the coil was working properly and started running the start sequence with a different accessory fuse removed each time I ran the test until the test light stayed on and the brakes wouldn't lock up. I found the source of the problem on my third try. Several years ago I installed an aftermarket cab heater. While contemplating where I should run the power for it from I located a pigtale in the area of the cab fuse box. It's a heavy gauge orange wire with a flat blade fuseable link prewired into it that isn't part of the fuse block. It was convenient so I used it. I ran a wire from the pigtale to an aftermarket rocker switch that I installed in a blank slot in the dash panel. I then ran a wire from the switch to a two speed fan controller in the heater. What's interesting is that the interlock circuit only tripped when the heater blower was set to low. I would always set the heat on high when I warmed up the machine in the winter. I would switch it to low after it started getting warm in the cab. I assume that the blower is going bad and somehow sending a short back through the pigtail that trips the safety interlock circuit locking up the brake. The good news is that I can still run the heater on high and open a window when it gets too hot inside. I have searched the internet to see oif I can find out what accessory that O.E.M. stock installed pigtail is there to supply power to. My concern is that it was meant for an accessory that required to be wired into the safety interlock circuit. Do you gave any idea what that pigtail is supposed to provide power too? Thanks for the help, Jim [/QUOTE]
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LS185b Hydraulic Brake Engaging Randomly
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