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John Deere Tractors Discussion Forum
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1520 Diesel Injection Pump

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Lee Little

10-13-2003 08:48:48




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This morning I had what appeared to be diesel fuel mixed with the oil in my 1520. The pump has been leaking fuel externally for a while, but I was trying to finish moving my hay. When I called the shop about rebuilding my pump after I pull it off, they told me it was obsolete and they could no longer get parts for it. It is a Roosa Master Model Number CBC331--3AL. They told me of a change over kit from John Deere. I called my Deere parts man and part of the numbers for the changeover came up obsolete. He hasn't given up and he told me to call him later this afternoon. I am certaiin someone on this board has dealt with this problem and can tell me which route to take to fix my tractor. She's too good to junk. Thanks in advance.(sorry for the long post)

Lee in Tennessee

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jdemaris

10-13-2003 18:13:20




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 Re: 1520 Diesel Injection Pump in reply to Lee Little, 10-13-2003 08:48:48  
The CB pump was declared obolete in the early 80s, but there are a few shops around that fix them as long as the pump does not need major components. The CB seal kit, I believe, is still available, which has all that's necessary to fix the internal leak. In fact, I might have the seals. It's a 10 minute job to put new seals in the CB pump; much easier than for the DB. If, as your say, the pump worked okay but just leaked, then a seal kit should be adequate. Usually, the first thing to go on the CB pump is the rack and pinion gear assembly that operates the throttle. Also, the plastic liner inside the electric shutoff tends to stick. If you don't know someone to call about the pump, try calling Ralph's Diesel (in New York State). He used to save all the old CB pumps for parts. I haven't spoke him if 10-15 years, but I think he's still around. Call 315-655-3702, and make sure you ask for Ralph Senior, or old Ralph, or whatever. He's got some young guys working there doing the automotive stuff, but he does the Ag. and off road stuff. Tell him John from the former Laneway John Deere dealership in Oneonta sent you (they folded in 1989).

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david val

10-13-2003 10:15:44




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 Re: 1520 Diesel Injection Pump in reply to Lee Little, 10-13-2003 08:48:48  
fuel in oil may very well be a torn diaphragm in the lift pump. check it out first. as for injection pump, i am sure that a apropriate 'b' pump from a scrap engine can be found with all nessessary parts such as fuel lines, pump gear and maybe front plate.
david



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