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the 20 hp has it mounted towards the backside of the engine the 50 hp is like you describe. both have tilting hoods that hinge in the back so going thru the hood would require a big hole. Maybe a pre-filter would be a answer.
Bob what is your though on this my 2 Chinese tractors were designed with a single stage air cleaner the 50 hp has a pooter the 20 hp does not. Would you fool around with a redesign to put on a 2 stage filtration or maintain what is there. Really I do not get a bunch of trash getting sucked into the inlets. Of course there is dust, I usually clean them out about every 50 hrs.
I can not help you with a diagram but just cause a wire is hanging does not mean that it is being used, everything works on my two Chinese tractors and there are wires coming out of the harness hooked to nothing. where are these wires located?
some tractors the bolts that hold engine onto trans would loosen causing shaft to distort the seal and letting out oil , I do not know if yours is in the group. look for any gaps in that area between any mating surfaces. take care of it soon to keep clutch pack good.
I do not know in your case but typically the seal lips go toward the liquid side. double check this info.
I would go by the dipstick on oil capacity if it looks like the original one , the engine might be different that the model your reference manual has listed so the listed capacities might be off. I would skip the motor treatments for oil . Maybe power source (diesel kleen)fuel conditioner though.
My 50 hp foton tractor(quanchi engine) has a oil dipstick that give’s bad readings if just pulled out and read. To get a correct reading you must pull it out wipe it off and then replace and pull and read, even if cold and has not run for days. I have no idea why I assume the dipstick tube is like that, but it is something you might want to try.
So I would assume that you have a common sump tractor one hydro system for the tractor ( back hoe separate system aw-46 there ). So you could use the heavier weight oil like universal tractor fluid (front axle not included 80/90 there). In real cold weather you might notice steering not right until fluid warms up a bit. But for the gears you need oil that will protect under load and give the hyrdos good flow.
well you need to know where your pumps are ,manf. of tractors each have their own ideas of how to do things. your 3 point hitch most likely has a pump in the rear end of the tractor for the lift so if it does aw-46. I would think would be a good choice. Power steering systems can run off a common sump or have it’s own hydraulic source, you will have to check on what you have. I would say that as far as the backhoe goes aw-46 should be fine , but there again does it have it’s own tank or does it run off the tractors hydro supply ? As far as the loader goes I have seen them with tanks mounted on the sides of a tractor for the oil storage but I do not think you will have that. You need to see if the loader runs off the tractors 3 point pump or a separate pump is used and where the oil comes from. you need a manual for the tractor and study it so good decisions can be made.
