oliver 2255

[jriddick]

My 2255 has the 3150 engine and it started making a knocking noise. I can loosing the injector line and knock goes away. I figured I had a fuel knock at best or a bearing issue. I have changed the injector on the cylinder that's making noise but noise is still present. I had put the tractor in barn until I could get to it but had to use it today. Drove the tractor about 4 miles. On the way back home the noise went away. When I got home I cut it off to give my hearing a break. When I started the tractor back the noise was still gone. As I put the tractor under barn noise returned. The tractor has 55 psi of oil pressure cold and about 40 psi hot very little smoke if any and starts soon as you hit the key. Only thing I have seen is a fuel leak at the fuel solenoid switch but I thought this should be common to the whole fuel system not one cylinder. Has anyone had a similar issue before.

 

[Mitch Poindexter]

Dads 4-225 started that one day last fall when on the grain cart. Kept running it and it went ahead and swallowed the valve and spit it out the side of the cylinder, that motor is now naturally aspirated. Might be worth a quick check of the valves by pulling the cover off and taking a peak at the valve train on the side that's knocking. Others will know much better than I do on what to look for ahead of time, I always seem to learn real well after the fact.

 

[terrya]

I had a similar issue with my 2255 this summer. The injector pump had recently been rebuilt, and inside the pump, the tab that raises a brass sleeve to meter the amount of fuel (there is 1 tab per cylinder) on 1 cylinder had slipped on the shaft, letting it raise the metering sleeve higher, sending full fuel to that 1 cylinder. The tab looks like a shaft collar with 1 locking screw, and a tab on the side that raises the metering sleeve when the shaft turns. This is located inside the top cover of the pump, and after being shown by the Cat serviceman, it was an easy fix. We adjusted the tab by about 1/8", so that it is in perfect alignment with the others, and it now runs fine.

 

[Hoboy]

I doubt that it is your fuel system for that 3150 should have a scroll fuel system and not a sleeve metering so the lever trick would not work. That being said the first thing I would do is pull the oil filters and cut the apart and look at the element to see if you have a lot of metal in the filter. For if a bearing was going out or a piston scoring it would put metal in the filter. That engine did have wrist pin problems. Also that old of an engine should have it rod and main bearings changed at 5000hrs for Cat had bearing problem at that time and that was the reccomedation to roll new ones in.

 

[mkuhns]

Are you dealing with more of a popping sound or a knock. Fuel system generally won't make just a knock without smoke of some kind especially intermittent. My guess would be a sticking valve. I'd also be suspicious of an exhaust valve seat coming loose sometimes staying in the head where it belongs, and sometimes floating with the valve and piston trying to make the valve close. Heating and cooling of the head and seat could hold the seat in the head at just the right temperature. I would pull out the injector, roll the engine over till both valves are closed and pressurize with a rubber tip blow gun and see if the cylinder holds pressure. Post back if you need more help.

 

[OLWHDA]

I USED to own a 1974 or 75 4-150 with the 3208 engine, 2 owner only had 1000 hrs when I traded for it, at 1125 hrs the only salvage was the valve covers and intake manifold maybe injection pump. Moving from field to field, rough road maybe 1200 rpms ducked its nose a little smoke rolled that was all she wrote, CAT came and inspected, agree on warranty because the writing on back of inserts was factory. 30 days later and $5000.00, they CAT claimed 50/50 warranty. I got my tractor back home, the day we finished planting soybeans