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there is nothing wrong running propane for sure ,everything engine wise lasts longer,the only downside is a slight power loss over gas. I guess where you are at you do not have clay soil, if slightly wet clay would never come out of a 4 inch bucket, sometime it sticks bad enought in my 24 incher. 2 miles hope you never have to look for a leak, so I assume that you are running a fluid thru a heat exchanger ? for climate control.
yes I have a 2005 lenar (dong feng) le204a and a 2006 foton ft504a ,a 2001 JCB 214 backhoe and a 2019 wacker neuson sw-20 skid steer plus various attachments for each.
thinking about repairs on the 2006 ft 504a, I had to resolder the filler neck on the rediator .I had to replace the tachometer pick up, That tractor has a compressor for air brakes if you were pulling a trailer so equiped. Never used it for that ,blow up tires can run a nail gun which has been handy. But the orginal air filter was just a small housing of foam kinda like a lawn mower uses,removed that and plumbed into clean air side of air filter for engine, now engine oil stays cleaner longer. replaced plastic fuel strainer bowl with a ford 8n type housing which is glass.just little stuff tractor has around 1000 hrs .on it. replaced filter screen on hydros and put in a 10 micron screw on filter just cause I thought the filter was better than the screen. Can not say to much bad about it.
I do not know if these are what you would call major repairs but on my 2005 dong feng 204a when new and got worse with time start circuit to starter,around 200 hrs added starter relay to hot from key switch to solenoid on starter . fixed it. around 700 hrs . water pump fan shaft sheared ,launched fan into radiator,pump not frozen. bad shaft I guess . replaced pump had 3 radiator tubes soldered up to fix leaks,still cools well without the 3 tubes. about 800 hours replaced seal and piston on 3 pt. lift. close to 1000 hrs . on now and no issues currently. will update later on 2006 foton ft 504a tractor.
I seem to remember that the quick connects could fail ,and when they did they restricted the flow . I believe that most people just changed them out ,instead if trying to repair them. I guess that would be something to check first at the inlets and outlets at the pump for debris fr0m the quick connects. If all is clean I guess it would have to be the valve body. Might want to look at the connectors to see if they have any filter screens inserted in them, you just never know.
It could have been a fluke but when I heated the ring gear to take it off and turn it over and then heated it again it never quite shrank down enough and when you would engage the starter the ring gear would spin on the flywheel so just be aware this I guess can happen. At the price I would go new and maybe save the old one as a just in case.
I got courious and looked at the y380 engine and the ring gear is replaceable and at circle g for 67 bucks plus shipping.
some ring gears are not directional and can be flipped over and some not, as I look at the picture of the ring gear it looks to me that it is a directional ring gear,but it might be the angle the picture was taken at. I am wondering if the ring gear was made on the flywheel and non replaceable too. I had one that I had flipped and could not get it to fully lock on the flywheel had to tack weld in a few places, it was on a tractor and the potential unballanced condition I created by tack welding did not show up because of the low rpms there. anyway it might be good to look at a exploded view of the clutch flywheel assm. and see if it shows the ring gear as a seperate piece.
