fuel problem I think?

sdd · Jun 17, 2015

Working in the dirt the other day on a td150 drott and had a sudden loss of power , while babying it , trying to get back to the barn it stalled. I fired her back up started fine run high
for a few seconds and started a slow stall, tried feathering , no good . So I figure it may need fuel filter s . I pop drain on fuel tank to see if I had water , no water . I move to filter s ,
primary was filthy , secondary not to bad. I replace both , bleed at filters . Didn't help same problem . Starts right up full throttle runs for about 30 or 40 second s and slowly dies.
Thinking it maybe pump. (Stanadyne ) but if pump was bad would it start at all? Could not find a obvious bleeder on pump itself .
Any advise would be appreciated.
Thanks.
Scott

dpendzic · Jun 17, 2015

some have had problems with debris in the tank--like leaves, rags,papers--and when running get sucked over the tank outlet--disconnect your fuel line well down stream and make sure you have good flow

EricB · Jun 17, 2015

Sounds like very good advice...I would put the air hose to blow back into the tank. If this all helps but it occurs again with a longer interval you have to clean the tank.

sdd · Jun 18, 2015

Thanks will give it a second look, did look for big obvious objects. It had good flow at primary (since I didn't get shut-off closed all the way when I opened filter canister) and barely cracked inlet to pump and got fuel immediately. Also when bleeding got air and then fuel quickly , then i thought the vent in tank cap so tried it, no change. Think i'll replace hoses from filters to pump ( should be replaced anyway) maybe a pinhole that's sucking air.
I think I remember something about a strainer or filter in the pump inlet.
Thanks ill post what I find.
Scott

Dieseltech · Jun 18, 2015

Could still be the injection pump, if the weight retainer ring is breaking apart inside the small bits will plug the return side and cause power loss/shutdown. To confirm let fuel leak out of the pump at the two screw timing cover on the side, if it runs/pulls ok then pump needs serviced soon before the pins shear off the retainer and wreck the pump. Tractors had a check valve in the tank bottom that return line went to, see if yours has it. If it does tank will probably need drained so the elbow valve can be removed and cleaned. Roosa-Stanadyne pumps will shutdown if return is blocked off.

sdd · Jun 18, 2015

Thanks dieseltech, I don't believe there is a check valve on recirculation but will double check. The timing plate, right next to the identity tag ? If it don't flow pump is ok? I will try the procedure tomorrow if we don't get flooded out.
Thanks so much guy's.
Scott

Dieseltech · Jun 18, 2015

After the two screw timing cover is removed look for bits under the gasket that look like coffee grounds as fuel leaks out. The small bits are from the failed retainer ring. If the engine runs fine with the fuel leak the return line is plugged, and pump will need serviced soon before more damage is done. 460, 560, and 706 tractors I've worked on have the check valve elbow in the tank bottom, I drain the tank and make sure it is cleaned when I have the pump off for service, just repaired a Moline pump for the same trouble..

Dennis K (WA) · Jun 19, 2015

The check valve dieseltech is talking about just has the appearance of an adapter fitting in the return.
I have seen them at the elbow where the return leaves the pump.
There is a ball and spring in side and can plug up.
Clean it out and go from there.
Dennis

fuel problem I think?

sdd

New User

dpendzic

Well-known Member

EricB

Member

sdd

New User

Dieseltech

Well-known Member

sdd

New User

Dieseltech

Well-known Member

Dennis K (WA)

Member

Similar threads