Ford 3400 Year model and fuel injection pump questions.

Hello,
I have a 1969 Ford 3400 tractor that seems to be quite tired. The motor still runs good but the rear hydraulics are kind of sketchy, the transmission slips after about 10 minutes of hard work, Ive been driving around with just one power steering cylinder (which still works surprisingly well ) and now I split open one of the loader cylinder that tilts the bucket. I found a local business that is selling what they believe is a 1975 Ford 3400. His forklift mechanic had told him that the injector pump on this tractor is bad. Supposedly the motor was rebuilt back in 2005. I have a few concerns about the model. The model number is C4022C. According to springfieldbiz.com the third number 2 shows it is gas but it is definitely diesel like mine. On the date code (5K01B) it seems they are calling it a 1965 model but the seller believes it is a 1975. If it helps the color of the tractor is more like a caterpillar yellow rather than the more true yellow like my 1969 is. myfordtractors.com seems to confirm its the 1975 model because the serial number starts with C48.. If Im reading both of these website tables correctly they both indicate that the model is gas (2) which is not the case. Unfortunately I got the numbers off of the hood and not off the motor/trans cases.
If this is indeed a 1975 model will my 1969 fuel injector pump fit it and if I have to use the whole motor assembly will it fit? Any help would be appreciated here.

A date code starting with a 5 on a 3400 could be a 1965 or a 1975 tractor, as the production run for that model covered both years, and the 5 only tells you that it was a year ending in a 5. A 1965 model would have louvered hood sides and a 1975 would have smooth hood sides like your 1969 model. The 3000 series, which the 3400 is a model of, used two different fuel injection pumps during different times of the production run. There was the CAV rotary pump and the Simms in-line pump. If the pump on your tractor is the same type as the one on the tractor you are looking to buy, then it should swap over without a problem If they are two different types the there is a bit more work to be done to get one to swap onto the other engine.

Hello, I appreciate the help here. Looking in my I&T shop manual it appears I have the Simms style injection pump on my 69 model. I believe the 75 model had the C.A.V. style pump because I dont remember seeing the three main injector line lined up like on the Simms pump. Is one of the pumps easier rebuilt than the other? Is it more likely that the later model would have the C.A.V. pump? You mentioned extra work if the pumps are different. Would this involve exchanging some of the fuel plumbing? What else might be involved here? Control cables? Also, just so I know, would a complete engine swap be possible on these two models? Thank-You

It is easier to swap engines than injection pumps. You said your engine is good. If the rest of the newer tractor is good, swap engines and repair your old tractor and the new to it CAV pump when you have time. If the front bolster and front axle look good, just split both tractors and swap everything from the clutch forward.

This post was edited by Check Break on 03/23/2022 at 05:17 pm.