DK45 Engine Noise

[swinny1947]

I just purchased a used DK45 from a dealer 6 hrs from my home so I didn't get to check it out. Both the dealer and the previous owner assured me there was nothing wrong with the tractor. Well so much for honesty. Oil, air and fuel filters hadn't been replaced in gods knows when. Battery practically dry, replaced half grease certs since they didn't take grease, replaced a leaking hydraulic hose, replaced fuel filter assembly which had been frozen and was broken.

The tractor starts and runs but there is entirely to much rattle in the engine. I am thinking it is the lower end but I am not a trained mechanic. i have Kioti dealer 1.5 mile from house (one reason I wanted to go Kioti) but they have no deisel mechanic. Been trying to find someone local to check out but so far no luck since I can't transport it.

It is 4wd so the front drive shaft splits the oil pan. It appears that the segment of the drive shaft below the pan is removable but not positive how it does. Anyone rebuilt a 45 hp Kioti. I read in another thread on a smaller tractor it is best just to replace the engine. I can see the benefits but the cost of the new long block engine alone is looking like 4-5k.

Any thoughts on a shade tree mechanic attempting to rebuild the bottom or replace the engine?

I am in Mooresville, Indiana. Thanks for any assistance.

 

[bluechip]

You can dro the drive shaft and pull off theoil pan to check for loose rod bearings. You can get a new crankshaft bearings and necessary gaskets/seals for a little less than half the cost of a brand new complete engine with warranty. If you are doing your own labor and work cheap, you can save money by just fixing what needs fixing. but if you are paying shop rates, the new engine becomes very affordable. We had a customer forgot to tighten a drain plug and ran his engine out of oil, we priced him a new engine he took it to the kubota dealer but they kept calling us and ordinging 2 or 3 more parts so I know they low balled him an estimate but the end result was that he paid as much for a rebuild as he could have got new and he has no warranty other than whatever the kubota dealer gave him. It is possible that a lack of maintenancecan and will lead to early engine failure. Hope is it just some loose rod bearings, fairly cheap and easy if the crank is not worn.

 

[swinny1947]

Thanks for the reply.

Assuming you are working in a dealership, is there a service manual or shop manual available for purchase by an owner that would give some instruction on the disassembly and assembly of the drive shaft, bearings, crank shaft?

 

[VictorW]

There is a workshop/service manual, from dealer only, for the DK45 but if it's like the one for my CK30hst, you need some general knowledge of what you're doing. It's not like the old Motors or Chilton manuals. If you're comfortable with gas engines, then you should be ok. A good help is getting the parts manual also. Nice breakdown diagrams of parts/assemblies that make more sense of the workshop manual. If it's bearings and maybe the crank, it shouldn't be to bad of a job.

 

[dennis52]

There is a workshop/service manual, from dealer only, for the DK45 but if it's like the one for my CK30hst, you need some general knowledge of what you're doing. It's not like the old Motors or Chilton manuals. If you're comfortable with gas engines, then you should be ok. A good help is getting the parts manual also. Nice breakdown diagrams of parts/assemblies that make more sense of the workshop manual. If it's bearings and maybe the crank, it shouldn't be to bad of a job.

Try this site for a Workshop/Service manual download

 

[dennis52]

Try this site for a Workshop/Service manual download

Oooooops forgot to include the address


downloads.pfgaustralia.com.au - /intranetwebcache/Service/Service Manuals/DA/DK 45-50 WM/

 

[bluechip]

As has been said, you can order a shop manual from any dealer, they are not like the old chilton or haynes manuals for cars, where they tell you step by step what to remove and replace, but will have a lot of information in them. Another idea is to get a mechanic stethescope and see ifyou can hear where the noise is. engine noise on diesels are tough because they have their own noisy, knocking sound. Do you also have a low oil pressure situation, worn bearings will drop the oil pressure, especially warm at slow idle. IF the rod bearings are bad and it is in fact a rod knock, most likely the crank journals will be bad and the entire crankshaft and bearings will have to be replaced, this is a full tear down and the engine will have to come out of the tractor to do it. I'm not sure if the rod bearings could be changed through the oil pan opening but they can be inspected.

There are other things that can make a diesel "knock" like a bad injector. with the engine running, crack open the hex nut on the metal line on each injector. each should cause the engine to miss and if one makes the engine quite, have that injector pop tested, or swap it with another and see if the problem moves or stays. if it moves, replace the injector.