Tafe 35DI Tractor - Mico Inline Injection Pump Woes

TallGuy123

New User
I've got a Tafe 35DI tractor of early 90's vintage with a Sampson 324S engine. It has an inline Mico inline fuel injection pump which was apparently built on a Bosch patent in India. The tractor runs fine best I can tell, but is seems to have a fuel leak into the oil chamber of the pump and is coming out of a small steel line that I figure is a vent / overflow. I spoke to a dealer in Kentucky ( about the only one left it seems ), and a remanufactured unit is priced at about $1800 and that's me removing and installing the pump of course! Does anyone know of a repair facility in the U.S. that can do a quality, reasonably priced rebuild of this pump?? The kicker I'm sure is the parts kit availability. I know there's a danger of a runaway engine upon startup and I'm very careful to have my hand on the shutoff and be seated on the tractor when starting it. The tractor seems to crank and run just fine, but I know the pump's days are really numbered. I understand there's a need to maintain the proper oil level in the pump....that damage was already done before I got the unit. Thanks for any help you can offer!!
 
If the pump has an overflow drip tube it's NORMAL to see some leakage on those pumps. What you are seeing is the small fuel seepage past the plungers, that eventually leak out the drip tube. Pumps that are engine oiled have no drip tube, and have different plungers that are ducted internally so the internal leakage is much less. I'll bet your pump does not have the ducted plungers in it. If it annoys you just put a catch can and empty it when needed. If the injection pump has a supply pump on the side those can fail internally also, and fill the pump really fast so that could be your leak too.
 
I noticed yesterday evening a puddle of fuel that appears to have came from that drip tube that was about a foot in diameter on concrete while running for only about 5 minutes in that spot. There's some leak(s) to the outside of the pump as well....particularly around a side plate. Do you have any idea about a domestic rebuilder of these Mico pumps?
 
Send me an E-mail, it should be open on Classic. I can repair the pump, but won't promise it won't still drip some internally. If new Bosch ducted plungers are installed that would help though.
 
I saw where you said you could repair this pump? There's two large springs that are broken. Is this something you can repair? And about how much do you thing it'll cost. I'll gladly call you and discuss on the phone. Or you may call me.
 

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