Good morning,
It seems that I need some help. I bought an injection pump in the US for a friend and it got shipped to France. It was sold as a rebuilt. It took long time to get the 4020 where the pump could be assembled. The pump did not look like a rebuilt, more than an old shelve item that someone did paint. Upon testing, we found that the solenoid was bad (would not clck), then we found that the tractor would barely start with a ton of smoke. Injectors are brand new original Stanadyne.
Then the pump as swapped with a CB from a 4520, tractors is running very well with ton of power then. So we are sure cupright is the pump.
Pump get shipped back (carried in suitcases by people visiting US tractors shows). We had to pay for another rebuilt at same place that did it (or did not do it first place), and we got the pump back.
Now, we got it tried out. Tractor is starting very well, but it sounds like it is missing a cylinder. Power and throttle reponse seems to be lacking a lot compared to the 4520 pump. Also, the rpm are not going to 2500, only 1900. Tractor is running with a small tank of fuel to make sure the supply system is not getting us.
Yesterday, the eveness of the flow was checked by putting clear tubes with plugs at the end of the injectors lines to collect the fuel while tractor was crancked, then the same thing was done with the injectors dumping into a glass. It was found that the flow was fairly even. The injectors where poped checked and are at 215 Bars all even.
What could cause the engine to "miss" at higher RPM?
Is it possible that the rebuilder forgot to check and set:
- Transfer pump pressure at full delivery
- Automatic advance adjustment
- Governor adjusting screw (If I understand right the SM2045, only way to adjust that one is with the stanadyne gauge?)
- Roller to roller dimension
- Full throttle stop
Also, if tranfer pump is worn, the fact that we are running the tractor on a bottle of fuel and not with the supply pump is making it worse?
Lastly, is it possible to get access to the smoke screw by removing the cam advance pin, while pump is at 90d from timing position?
Thanks,
Frdric
It seems that I need some help. I bought an injection pump in the US for a friend and it got shipped to France. It was sold as a rebuilt. It took long time to get the 4020 where the pump could be assembled. The pump did not look like a rebuilt, more than an old shelve item that someone did paint. Upon testing, we found that the solenoid was bad (would not clck), then we found that the tractor would barely start with a ton of smoke. Injectors are brand new original Stanadyne.
Then the pump as swapped with a CB from a 4520, tractors is running very well with ton of power then. So we are sure cupright is the pump.
Pump get shipped back (carried in suitcases by people visiting US tractors shows). We had to pay for another rebuilt at same place that did it (or did not do it first place), and we got the pump back.
Now, we got it tried out. Tractor is starting very well, but it sounds like it is missing a cylinder. Power and throttle reponse seems to be lacking a lot compared to the 4520 pump. Also, the rpm are not going to 2500, only 1900. Tractor is running with a small tank of fuel to make sure the supply system is not getting us.
Yesterday, the eveness of the flow was checked by putting clear tubes with plugs at the end of the injectors lines to collect the fuel while tractor was crancked, then the same thing was done with the injectors dumping into a glass. It was found that the flow was fairly even. The injectors where poped checked and are at 215 Bars all even.
What could cause the engine to "miss" at higher RPM?
Is it possible that the rebuilder forgot to check and set:
- Transfer pump pressure at full delivery
- Automatic advance adjustment
- Governor adjusting screw (If I understand right the SM2045, only way to adjust that one is with the stanadyne gauge?)
- Roller to roller dimension
- Full throttle stop
Also, if tranfer pump is worn, the fact that we are running the tractor on a bottle of fuel and not with the supply pump is making it worse?
Lastly, is it possible to get access to the smoke screw by removing the cam advance pin, while pump is at 90d from timing position?
Thanks,
Frdric