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calico190xt68 
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Joined: 12 Jan 2017
Location: Frankton, IN
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 Topic: Electronic Tachometer Implementation
Posted: 20 hours 12 minutes ago at 5:00pm |
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Again, this is off Allis topic but I do use this semi as "farm equipment". I can't resist asking because the electrical help is phenomenal on the forum! The GMC General semi that I just fixed the burnt wire on has no mechanical tachometer cable. I believe it is missing due to the Cummins engine replacement. The tach cable may not have matched the tach in the dash. Just wondering if it would be possible to install a new Electronic Tachometer that uses the alternator? I believe I have the 12000 LC series Leece/Neville alternator but they do have multiple models and not sure which one I have. Would this alternator work with an Electronic Tachometer? The other option is to purchase a mechanical cable and replace the tach in the dash that fits that cable. I would really like a working tachometer on this truck. I don't care about the odometer. To bring this topic back to tractors though, could you also implement an electronic tach on a tractor if you really wanted to do that? Thanks for any and all electrical advice!
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80 7010, 80 7020. 67 190XTD Series I w/500 Loader, AC 2000 Plow, AC 4 row Planter, AC 77G Rake, Member Indiana A-C Partners, Member TAC
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 22240
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Posted: 20 hours 10 minutes ago at 5:02pm |
Alternators designed for tachs will have a 'special' terminal or tab. That info 'should' be in the spec sheet......
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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PaulB
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
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Posted: 19 hours 42 minutes ago at 5:30pm |
If the tachometer in the dash is a mechanical unit and the rotation is the same, just get a drive cable made to go from the tach drive on the engine to the dash. For an electric tach get mechanical sender that goes where you would connect a drive cable.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 17 hours 57 minutes ago at 7:15pm |
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and on a tractor.... diesels engines normally use the pickup stud on the alternator... gas engines can use the PULSE from one spark plug...... and it is always possible to mount s SPEED PICKUP sensor on a bracket near the crank shaft pulley and use a magnetic strip on the pulley, or a set screw, or a hole, etc... anything you can COUNT per revolution.
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Like them all, but love the "B"s.
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
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Posted: 16 hours 38 minutes ago at 8:34pm |
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It is possible to put to get a tach and pickup. Speedhut has everything you need on thier website. You can have the tach made with different background colors and even a logo. I just had one made for my L3 gleaner. Its possible that the sae belhouing has a hole drilled and tapped for the pickup
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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calico190xt68
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Joined: 12 Jan 2017
Location: Frankton, IN
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Posted: 3 hours 60 minutes ago at 9:12am |
Based upon the comments, I did some research. The Cummins 855 engine uses a mechanical tachometer that goes into the Cummins PT 1 Injection Pump. The original Detroit Diesel engine has multiple options with the primary option being engine mounted reading the camshaft. While it may be possible to screw in a mechanical cable into the current gauge, doubtful that it would be calibrated correctly since it was for detroit diesel gauge. So, I could get a PT 1 Pump tach cable (it has been missing since I bought the truck) and a compatible mechanical gauge from Cummins. Although I have noticed that Cummins makes John Deere parts look cheap sometimes. I might get the speedometer back if I did this I believe. Of course, I haven't opened up the dash yet to see what I really have. Nothing surprises me on this truck when it comes to wiring.
The other possibly easier and cheaper route is to use the alternator. I think I need to find the "AC Tap" terminal on the Leece/Neville alternator. If I can't find that terminal, I could get one of those magnetic pulse sensors mounted to the outside of the alternator.
8070nc, I looked at Speed Hut and Autometer. Since you say Speedhut had everything you needed to do a Gleaner L3 engine, I thought I would see if you could provide which Diesel Tach model you bought and what method of input did you use for Tach? SpeedHut mentions that there are 3 ways to use their Diesel tachs: an alternator with an ‘R’ or ‘W’ terminal, a crank sensor signal, or a magnetic pulse sensor. I think Leece Neville calls the R/W terminal "AC Tap". I got to clean my alternator off to see if I can find it. Did you have any trouble calibrating it?
The configurable color and logo is definitely cool! It is about the same price as other Tachs. I have been thinking about some orange lighting on the outside of the truck so an orange tach would be a way to bring the Allis theme in play. :-)
I love the design tool they have online. This is my first stab at the design. Hard to find a clean gmc general logo so far. I need to move the general on top of the stars.
Thanks for the help everyone!
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80 7010, 80 7020. 67 190XTD Series I w/500 Loader, AC 2000 Plow, AC 4 row Planter, AC 77G Rake, Member Indiana A-C Partners, Member TAC
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8070nc
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Location: North Carolina
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Posted: 2 hours 13 minutes ago at 10:59am |
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I got the one for a magnetic pickup. The pulley on the output shaft on the engine is toothed and the original tach had a pickup there. I havent installed mine yet but I dont anticipate any problems calibrating it
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
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Posted: 2 hours 9 minutes ago at 11:03am |
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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calico190xt68
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Joined: 12 Jan 2017
Location: Frankton, IN
Points: 791
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Posted: 1 hour 57 minutes ago at 11:15am |
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That is swweeeet! I had a feeling that was your logo. I am wondering about those shift lights and how they will work. I also noticed I can get a GPS speedometer from them with the same features. Of course, the two gauges are going to set me back about $550 but can do it myself. My son would love all the gauges to be speed hut. Thanks for turning me onto that company!
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80 7010, 80 7020. 67 190XTD Series I w/500 Loader, AC 2000 Plow, AC 4 row Planter, AC 77G Rake, Member Indiana A-C Partners, Member TAC
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
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Posted: 1 hour 41 minutes ago at 11:31am |
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Glad I could help
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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