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ToddnwIl 
Silver Level
Joined: 07 May 2013
Location: Illinois
Points: 316
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 Topic: 7060 alternator problem
Posted: 13 Jan 2021 at 4:39pm |
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Our 7060 had the neihoff alternator on it and we have changed it over to a delco 110 amp alternator. We are using the old pulley but the tachometer isnt reading right. What pulley do we need and where can we get it?
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jaybmiller
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 25247
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Posted: 13 Jan 2021 at 4:53pm |
betcha Steve wil know........ I'm thinking if it reads low now, you need a smaller pulley as that'd speedup the alternator. Course that begs the question HOW will you know that 1200 RPM IS 1200 RPM ?
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Joe(TX)
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Joined: 11 Sep 2009
Location: Weatherford. TX
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Posted: 13 Jan 2021 at 5:02pm |
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If you are using the old pulley, I should be turning the same speed. There may be a difference in the number of pulses between the alternators.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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Darrell G (MN)
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Location: Green Isle MN
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Posted: 13 Jan 2021 at 7:09pm |
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I believe ( can't remember for sure, someone told me that when I was thinking of a Delco.) you need a pully from a 1206 int. and that should make your tack accurate
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Ron(AB)
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Joined: 27 Dec 2009
Location: Alberta
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Posted: 13 Jan 2021 at 7:39pm |
Size doesn't matter. haha 
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Lynn Marshall
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Joined: 13 Sep 2009
Location: Dana, Iowa
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Posted: 13 Jan 2021 at 8:08pm |
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I get mine from Sioux City. They are 3 7/8 outside diameter. I was thinking that Shoup offered them too??
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Albert
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Joined: 11 Sep 2009
Location: NW MO
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Posted: 13 Jan 2021 at 8:56pm |
I can help with the correct pulley for the conversion and also the belt will line up better. Albert
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Michael V (NM)
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Posted: 13 Jan 2021 at 10:10pm |
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How did ya get the niehoff pulley on the Delco? The niehoff I have seen, the shaft is smaller than the Delco, I suppose it could be drilled....
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Gregor
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Joined: 11 Sep 2009
Location: Prague, Ne
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Posted: 15 Jan 2021 at 10:16am |
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I was wondering the same how you got the pulley to work. A year or so ago I changed out my 8030 to a delco and had to get a new pulley as the one it came with only had a single grove belt set up and the niehoff pulley would not work?
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DrAllis
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Joined: 12 Sep 2009
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Posted: 15 Jan 2021 at 11:56am |
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40+ years ago, A-C had a "kit" to update older Delcrotron alternators (old maroon 7000 series) to the new 100 Amp Neihoff. It came with a new tachometer. Must be the old tach wouldn't read correctly with the Neihoff.
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Steve in NJ
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Posted: 16 Jan 2021 at 9:53am |
Not only did some of the Niehoff's have a smaller .580 shaft, vs the .670 Delco shafts, the pulley diameter as well as the offset was a bit different also if memory serves me right. As Albert mentioned the belt fits better. Its been quite a while since I've changed over a Niehoff. They were a PIA sometimes when it came to tachometer outputs... Steve@B&B
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Alvin M
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Posted: 16 Jan 2021 at 10:17am |
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I use Select Parts # 778-1069-1 it is the right to change from Niehoff to delco tack will work right niehoff pulley was 3 1/2 O.D delco is 3 7/8 O>D.O Shaft size is.670 For both
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Kevin in WA
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Joined: 08 Feb 2010
Location: Lynden, WA
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Posted: 16 Jan 2021 at 10:32am |
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Hy Capacity has a pulley for this conversion.
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