Combines Shaft sensors

[Silver_aussie]

G'day rig, Been a few years now, but I had some trouble with cage sweep sensor on a N-5, and it turned out to be a bare wire rubbing, causing the alarm to sound. Can't exactly remember where it was, but I think I found it in the engine bay not far from where it comes out of the rotor area.(Hope I'm thinking of the right one!!)

 

[Tom_Russell]

I solved my shaft sensor problem by replacing the harness in the engine area. I figured my time and sanity were worth more than the cost of the harness. Good luck.

 

[T__langan]

Seems like it was discussed here a year or two ago that you can splice in another sensor to give twice the signals to the monitor to eliminate this problem. It will still work as intended because if the shaft stopped, so would the signals and trigger an alarm. You simply mount the 2nd sensor on the opposite side the shaft as the original and splice the wires into the original sensor wires. However, this probably won't solve anything if your problem is a grounded wire somewhere. Perhaps the person who thought of this brilliant idea can elaborate.......IJ

 

[Nobul]

Got the same problem with the clean grain elevator sensor on an R-50. Operates well for a while, make a left hand turn and the intermitent bleeping beeping starts.A wire grounding out will cause thisIJ Thanks, Rob.

 

[Bluebeard]

On our R62 the straw spreader sensor plays up. Extra tangs were welded to the locking collar, sensor replaced and an auto electrician checked it out. But still it will send the alarm off over and over again when it is in one of those moods. You can see in the mirror that the spreader is still working. I have found that by just wriggling the loom from the sensor through to where it plugs into the main loom will cure it for a few days. It is one of those frustrating gremlins, I guess I would replace that section of wiring if it got too persistant. Hope this can help you.

 

[Turbo]

On straw spreaders,we have put the sensing collar on the cross shaft and moved the sensor.The cross shaft rotates at a faster speed.If you are replacing the bearings in the spreader unit,then you can re-use that collar.After doing this,we have not had an intermitent light problem.

 

[Rig]

Sounds from the posts like I need to think about replacing wiring or doing something to speed up impulses from the slower sensed shafts. I did some experimenting this evening. I have an old lab oscilliscope and I hooked it up to 3 different sensors. The grain elevators were the easiest to connect to and I tried the cage sweep also. I only ran the machine at 1500 engine rpm speed but I was surprised that I was getting from 1-1.5 volt peak to peak out of the elevator sensors. I measured the speed at 40ms--with 6 spokes on the ring that is 250 rpm on the clean grain elevator at 1500 engine speed. Is this rightIJ Then I tried the cage sweep and measured much less voltage with lowsy spikes. Something is up with that. I'm going to try a different sensor and different adjustments tomorrow. The people that used more than one sensor--did you wire them is series or parallelIJ p.s. You guessed it--it rained at my place today too. Idle time......

 

[Rig]

Just had a thought. This cage sweep sensor is different as it senses the cogs of the idler sprocket instead of a added ring. Maybe that worn out sprocket with rounded edges is not doing what it should to the sensor.

 

[R_O_M]

Try disconnecting all the wiring looms at the various plug connectors,particularly the main connectors in or near the engine bay, and blowing them out with compressed air. Dust collects in these plugs, attracts moisture and the resulting corrosive products creates a thin layer of corrosion on the pins. Its fixed some of our problems in the past. l.O.l. [ lots Of luck ]

 

[Dan]

We tried wiring in a second sensor one time and wired it in parallel. Didn't work no matter where we placed second sender. Maybe series would work but I doubt it. We were only doing this to keep light out after we slowed a shaft hear or there more than factory had planned for. Making an eight leg collar worked for what we were doing but won't help you in cage sweep situation. I think cage sweep idler sprockets were lay cut at one point to keep sending surface very true. Check wiring schematic but I believe it is the red and white wire that is common to most sender and spliced together hear or there in harness. I have just ran extra wire from sender to another sender to hook up white and red wire it splice is bad somewhere in harness. Most common shaft monitor problems are poor connection at plug nest to fuzes and or next to module. Well go into plug and squish together connector a bit than use electrical grease to help it slide together and stay clean. The cage sweep seemed to be the most fussy with its slow speed or the fat teeth it is counting. I sometimes wondered if it was static affected on that location. Wouldn't know for I don't don't know of a single left to right cage sweep that is still installed around here. Newer machines have tweaker screws on module so you can set where light goes out to a certain extent anyway. I believe they started installing tweaker screws around 1990 or so. Good luck