TS110 losing power

[crbearden]

TS100 New Holland 2 WD tractor w/ 16x16 trans cab w/air loader attached. Engine starts easily and seems to rev up to full throttle ok.. When slightly loaded it begins to pull down and acts as if there is no governor available. Tractor has 2293 hours and uses no oil. I have replaced the fuel lift pump twice in last week and replaced filters. It has a Delphi inj pump installed at about 1550 hours. Tractor is serviced and maintained regularly. When connected to 648 New Holland Baler, It will barely go up an incline when baling. When traveling in high gear on roadway, it will pull down to 1500 RPM on slight incline. Works fine for about 5 minutes after starting, then begins to have no power. After running about 30 minutes, I could lay my hand on the injector pump, but the fuel shutoff solenoid almost burned my finger.

The fuel pump on this tractor was replaced, not rebuilt with a new Delphi pump 743 hours ago. I have kept the filters changed and the fuel clean, so I cannot believe the pump needs rebuilding unless the Delphi pump is a pile of crap to start with. The original pump self destructed at 1550 hours, requiring a new pump. Pump shop stated the pump had been tampered with causing a bolt to beak internally. The load is not excessive as the tractor was pulling the same load fine 2 days earlier. I have sealed all possible leaks around the primary filter, and find no wet spots when pressurizing the tank. Is it possible that the shut off solenoid is bad since it is getting hot. The shutoff solenoid is a plunger at the back of the pump near the distributor head. I am about to pull the tank and check the intake line in the tank, it is all that is left.

 

[TractorTech]

Check the fuel intake at the filter head and look at the underside of the filter head to make sure there isn't a gasket or some other obstruction under it. Also, look at the sedimenter bowl, if it has one, for the same things. Then, take a line off of at the input to the injection pump, hand pump the fuel and see if it is a fairly decent amount coming out.
You can also back blow with low pressure into the tank supply line with the fuel cap off to see if there is an obstruction in the inlet before you have to remove the tank. If it clears up for a while and comes back, then remove the tank and take a look.

 

[crbearden]

Good idea, I will try checking output of fuel line under pressure. The lift pump is electric and is mounted on top of the filter housing. The filter is a quick mounting type and also is the pump on top of the filter housing.
here is a link to the type of filter housing it has Filtration Systems - Stanadyne

 

[TractorTech]

I am familiar with that system. From your previous description, it sounded as though you had a manual pump.
I would check flow to the inlet of the injection pump first to see what it looks like.
It would still be a good idea to check under the filter head and inlet for obstructions. You can also back blow the inlet fittings on the filter and sedimenter.

 

[crbearden]

Tractortech you hit the nail on the head.....

We have been over thinking this. I pressurized the tank again and this time removed the line at the sediment bowl. Fuel barely trickled. I then built a better connection to the fuel line and blew back to the tank. Some pressure built up before I heard the blockage break loose. Since I need the tractor, I will remove the tank later and find what was causing the blockage. If this happens again, I can blow out the line. I panicked because this was my only tractor left to use, and it has cost a fortune to repair in the past. I know I had blown out the line earlier, but I did not have a good connection to the line to blow out the blockage.

Thanks all for the help.