kingjames8283
New member
- Joined
- Jan 20, 2007
- Messages
- 11
Hello everyone, I am new to Chinese Tractors as of 3-weeks ago but have 22 plus years in trucking and working on diesels. I took on a project 3 weeks ago for a friend of mine and I've hit a brick wall. I need input from other diesel mechanics who have battled this problem.
The project: non-running tractor.
Model ID: Homier FarmPro 2420 / Jinma tractor 200 series.
Engine: TY290 2-cyl, 20Hp.
Engine hours: 27 actual
Tractor setup: Basic, no hyd-attachments.
I found a non responsive tractor of which I've brought electrical system back on line with a minor repair to starter solenoid. Next tractor will not start. Check, no fuel being pumped. Checked all lines, filter, and strainer. No air leaks, no blockages. Upon further inspection found fuel inj-pump dry as a bone. No oil inside pump. Owner claims that after he bought tractor he had a runaway engine condition but was still able to use tractor upto 5 months after incident. Lack of oil in speed governer the problem. However after that 5 month run the tractor quit running and hasn't ran since. That was 9 months ago.
Although fuel inj-pump non-responsive, I used a prop against the fuel primer and gave a couple of pumps and started engine. Provided I continued pumping gently on the primer the tractor ran beautifully but the minute I quit pumping the tractor died. My prognosis to owner, needs new fuel injector pump.
Fuel injector pump (2i70) which is the pump for that unit however it didn't match the one that came off it. I estimate the old pump was an early Chinese design. I properly mounted new pump, setting up drive gear clock settings, filling inj-pump with Penzoil HD30 wgt oil, re-attached fuel lines and installed new WIX 33361 fuel filter. After spending forever purging fuel system of air, I attempted a first start using proper cold weather starting protocol. NOTHING. I have rechecked fuel reaching nozzles which is now very strong and engine is trying to start but after it runs 3-5 seconds it stops.
I have yet to confirm pump timing by pulling number one injector line off pump, but have confirmed that drive gear is turning as well as fuel inj-pump camshaft. I have tried unsuccessfully for three hours to start this engine and still nothing. Because the glowplugs are functioning on this engine, I am not using ether because I don't want to further complicate the process. At either rate, this engine is trying to start and can't.
Because there is some healthy black smoke coming from the exhaust pipe, I wonder if I have a fuel overload condition. When I attempt to add throttle during start the engine boggs ways down and then I must decompress engine to bring rotation speed back up. I remember the Detroit 6-71/238Hp engines were bad for this but that was due to fuel leaking down into combustion chamber while engine was off (fuel loading). You'd start that Detroit engine and smoke could be seen from the space station.
Back to my project, I've made a promise to this friend that I'm gonna get this cute little tractor of his running but after 3 weekends of this I'm beginning to wonder myself. I don't get it, this diesel engine design is what I started out with some 22 years ago. It's not new to me but I've hit a brick wall. Does anyone know something I don't, or can someone clue me into something that maybe I've missed myself. I've followed protocol and have still failed. Please send the Chinese Gods to help me figure this out...
The project: non-running tractor.
Model ID: Homier FarmPro 2420 / Jinma tractor 200 series.
Engine: TY290 2-cyl, 20Hp.
Engine hours: 27 actual
Tractor setup: Basic, no hyd-attachments.
I found a non responsive tractor of which I've brought electrical system back on line with a minor repair to starter solenoid. Next tractor will not start. Check, no fuel being pumped. Checked all lines, filter, and strainer. No air leaks, no blockages. Upon further inspection found fuel inj-pump dry as a bone. No oil inside pump. Owner claims that after he bought tractor he had a runaway engine condition but was still able to use tractor upto 5 months after incident. Lack of oil in speed governer the problem. However after that 5 month run the tractor quit running and hasn't ran since. That was 9 months ago.
Although fuel inj-pump non-responsive, I used a prop against the fuel primer and gave a couple of pumps and started engine. Provided I continued pumping gently on the primer the tractor ran beautifully but the minute I quit pumping the tractor died. My prognosis to owner, needs new fuel injector pump.
Fuel injector pump (2i70) which is the pump for that unit however it didn't match the one that came off it. I estimate the old pump was an early Chinese design. I properly mounted new pump, setting up drive gear clock settings, filling inj-pump with Penzoil HD30 wgt oil, re-attached fuel lines and installed new WIX 33361 fuel filter. After spending forever purging fuel system of air, I attempted a first start using proper cold weather starting protocol. NOTHING. I have rechecked fuel reaching nozzles which is now very strong and engine is trying to start but after it runs 3-5 seconds it stops.
I have yet to confirm pump timing by pulling number one injector line off pump, but have confirmed that drive gear is turning as well as fuel inj-pump camshaft. I have tried unsuccessfully for three hours to start this engine and still nothing. Because the glowplugs are functioning on this engine, I am not using ether because I don't want to further complicate the process. At either rate, this engine is trying to start and can't.
Because there is some healthy black smoke coming from the exhaust pipe, I wonder if I have a fuel overload condition. When I attempt to add throttle during start the engine boggs ways down and then I must decompress engine to bring rotation speed back up. I remember the Detroit 6-71/238Hp engines were bad for this but that was due to fuel leaking down into combustion chamber while engine was off (fuel loading). You'd start that Detroit engine and smoke could be seen from the space station.
Back to my project, I've made a promise to this friend that I'm gonna get this cute little tractor of his running but after 3 weekends of this I'm beginning to wonder myself. I don't get it, this diesel engine design is what I started out with some 22 years ago. It's not new to me but I've hit a brick wall. Does anyone know something I don't, or can someone clue me into something that maybe I've missed myself. I've followed protocol and have still failed. Please send the Chinese Gods to help me figure this out...