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Discussion Starter · #1 ·
Just bought an 1855, didn't get it running yet, PO said they replaced the original engine with a 20 horse linimar/onan performer and it ran hot and lost power ever since. The engine supposedly only has very low hours on it. My question is did anyone else have a hot running problem with one of these? Thanks. Bill.
 

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Red Tractor Nut & Diesel Addict
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Some of the later model Onan engines had fixed flywheel screens & would clog up with debris easily, then overheat FAST! People would just cut an access hole for the driveshaft through the stationary screen.
 

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We re-powered our 1855 B48M with a P220 and never had a heat issue.
Did the mice move in and cause a restriction, could the shrouding not be installed correctly?
That is a shame that that P220 was trashed. If I remember right our conversion cost us around $1700.00 in the early 80s. Cam nose broke on the B48 and have no reason why. Just driving along and Bang we stopped right there.
 

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Red Tractor Nut & Diesel Addict
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There's a good chance that a valve seat came loose from the heat. Not hard to repair. If the seat came loose, then you'd be running off one cylinder, which would drop your power by at least 60%.
 

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Discussion Starter · #5 ·
Thanks for the quick reply, can't get it inside yet it's still on the trailer and it's been raining all day and work got in the way!
 

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Discussion Starter · #6 ·
I don't know if the engine is trashed, he said they stopped using it because they couldnt resolve the heat issue. Parked it and bought something else.
 

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Enginerod said:
I don't know if the engine is trashed, he said they stopped using it because they couldnt resolve the heat issue. Parked it and bought something else.
If it does have a stationary flywheel screen, most likely a rotating one that bolts to the flywheel could be used....that is if the flywheel has holes for it, or bosses that could be drilled & tapped. Take a look & see if the screen rotates with the flywheel.
 

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Discussion Starter · #8 ·
Hope to get into it tomorrow, I have to get the snowblower on the kubota G5200 before the Buffalo winter moves in. Then I can get the 1855 in the garage. Here's to hoping I can get the engine running and the hydraulics work good. I want to build a loader for something don't know if it will be the kubota or the massey.
 

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Enginerod said:
I don't know if the engine is trashed, he said they stopped using it because they couldnt resolve the heat issue. Parked it and bought something else.
That's good new. We my be able to salvage this one.
 

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Tractorholic
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Good luck getting it running!
 

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ErnRemy said:
Just a thought but here is a leak down tester that can be built from everyday parts either in the shop or off the shelf very helpful in diagnosing the problem
Building and Using a Cylinder Leakdown Tester
it help me determine if it was leaking at the rings or the valves, if its the rings it pull the engine time.
Good information. Thanks
 

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ducky said:
We re-powered our 1855 B48M with a P220 and never had a heat issue.
Did the mice move in and cause a restriction, could the shrouding not be installed correctly?
That is a shame that that P220 was trashed. If I remember right our conversion cost us around $1700.00 in the early 80s. Cam nose broke on the B48 and have no reason why. Just driving along and Bang we stopped right there.
Good chance that all the overheating problem is just plugged up cooling fins from mice or what ever.
Maybe you could remove the shrouds and see if there is anything foreign in there restricting the airflow, It's not going to cost any money to do this.
 

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I hope you get it sorted out. An 1855 is a mighty nice tractor! Congratulations.
 

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Discussion Starter · #18 ·
Update, got the onan started, ran it for about 15 minutes and it is not getting hot, seems to run very well, hydraulics work and the hydro seems very strong. I know this because I hit the hydro pedal while it was still ratchet strapped to the trailer, it pulled hard against the straps and spun the flat tires LOL. I think it may have run hot for the PO because the exhaust pipes connecting to the engine are loose and alot of the exhaust is coming out there and with the air filter on it would be sucking this very hot air into the engine and really boosting combustion temps. The pipes only had worm gear hose clamps on them, I'll go tomorrow and get the right clamps. Now Ijust need 4 tires. Bill.
 

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Discussion Starter · #20 ·
Ran the 1855 a bunch more today, runs great except the choke has to be partially on. I guess I will have to clean the carb and knock out the plugs covering the mixture screws. Hydro seems very strong and the three point will easily pick up a friend of mine and me, 248lbs for me and about 270 for my friend. Now I feel safe to order the tires for it, tru-powers and vredesteins! Also I was wondering how hard they steer, mine has 4 flat tires that are totally cracked open so I cant tell. Hope it steers as easy as the G5200.
 
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