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Macktruckman

EM6 tachometer drive help

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1980 EM6-285 with Robert Bosch pump. Tachometer cable doesn’t run directly into the engine. It uses a funny little drive adapter that moves the cable over to clear the pump. My Mack dealer hasn’t been any help. The gear broke in the adapter and I need one. Can anyone send me the right direction?

thank you 

 

22B38A8C-F2DE-4D4D-92C4-D6CBF22FAC59.jpeg

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Weird. I have a 1981 2 valve endt676 engine sitting on the shelf. Same block, but I don't think it uses that. I'll see if my 1988 em6-300l uses one...

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The difference is which injection pump it uses.

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Posted (edited)

Seems as a pretty common part. At least I saw one in my junk inventory, probably off EM6-285 either. I would ask any big used Mack parts supplier like Matt Pfahl, Global Truck Traders or Sparr on that thing.

Too probably it was used by other truck makers of those years but unfortunately I'm not familiar with any other cases.

Edited by Vladislav

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This one has a Robert Bosch 

theres five more r models here of various years and all of them are American Bosch and don’t have this thing. Naturally I have the oddball. Lol

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5 hours ago, Macktruckman said:

This one has a Robert Bosch 

theres five more r models here of various years and all of them are American Bosch and don’t have this thing. Naturally I have the oddball. Lol

I have some ambacs and I think a Robert Bosch, none have the adapter. Are you sure you need it?

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That is a 1-1 ratio used to clear the supply pump if I remember correct.  You don't need if you can get your tach cable to go in straight.  The part # is 119AX5247, not sure if it goes to a volvo world #.  Last time I check  years ago it was the price of a couple Disney tickets.  Our's worked with it.

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Thank all of you guys for your help. 

I really appreciate all of you taking the time 

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