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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Alternative to OEM tractormeter gauges

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Bill Darte

04-05-2005 08:53:13




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I am planning to replace all gauges in my 135 3cyl gas with 8-speed tranny. I will use medium quality oil, water temp, ammeter. I want to use the same vendor's gauges for fuel, but don't want to replace the sending unit....are all such systems the same? I mean the fuel gauge I'm buying has an optional sending unit, but my other one worked with the old gauge...

Also, automotive ammeters are usually 60-0-60. A knock against ammeters with auto gauges I have read is that....not enough resolution to do any good...opinions please...

My 135 has an RPM gauge that highlights the 540 rpm for implements, so seems to be for a tractor, but have no idea if it is original equipment. A MF replacement is $80 bucks and is available. There are many alternative 'tractor meters' on the market that say they are for the 135 8-speed...ranging from $50-$65.

There are also relatively cheap motorcycle and other tachometers available that might fit. Some of course are electronic rather than mechanical. Can these work?

Thanks for your experience...

bd

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Cosmo

04-05-2005 15:23:32




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 Re: Alternative to OEM tractormeter gauges in reply to Bill Darte, 04-05-2005 08:53:13  
My El-cheapo FE 35 didn't even come with a tractormeter, just a cover over the hole. I used an electronic tach from J.C. Whitney. It is 0 to 4000 RPM. Works fine. Regards, Cosmo



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bruce g. olson

06-22-2005 14:24:01




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 Re: Alternative to OEM tractormeter gauges in reply to Cosmo, 04-05-2005 15:23:32  
how do i get the voltage gauge out of the hole on dashboard to reconnect a broken wire, hope you can help me its a 1972 massy ferguson desiel tracter respfully bruce olson



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Gerald J.

04-05-2005 12:23:59




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 Re: Alternative to OEM tractormeter gauges in reply to Bill Darte, 04-05-2005 08:53:13  
You want a 30-0-30 ammeter. Available from Farm stores if not auto stores. You can hardly see 10 amps charge rate (and my MF-135 peaks at under 20 amps) on the 60 amp full scale meter.

There are at least three variations on gas gauge systems. The meter and the sender need to match or you are better off with a wooden stick poked down through the open gas tank cap. Some go in opposite directions. Some are low resistance for full, some are high. Some have a minimum resistance different than others an some have a different resistance range. There's only "universal" when the meter and the sender match and the sender is adjustable for tank depth and mounting.

The tachometers for cars tend to expect idle speeds where tractors run at full load, so the display gets compressed. Seeing the difference between 1500 and 2000 RPM (min and max working speeds for the MF-135) on a 0 to 12,000 rpm tachometer leaves a whole lot to be desired.

If the old gauges work, why replace them? They are selected to match the needs of the tractor. You need a tach with 2500 rpm full scale. Fast idle on a big racing car engine.

I have seen a digital tach with 10 rpm resolution, most are 100 rpm resolution. And then you loose the reference for 540 PTO speed which can be important to the use of PTO power implements. Too slow and they won't work well, too fast and they fly apart. But the digital tachs won't fit the MF-135 dash opening. Its too big.

Few if any automotive tachometers allow for three cylinder engines and electrical drive. A mechanical tachometer also has to allow for differences in the drive source (camshaft, crankshaft, governor shaft, generator shaft) speed and direction.

Gerald J.

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