Ed's 77 Terex 72-41 Wheel Loader

[ptsg]

Sounds to me that's a fuel supply issue.

I would check for any blockage at the fuel tank output. Make sure there is nothing inside the tank, moving around and blocking the fuel passage. I've had this happen before with pretty much the same symptoms, just on a much smaller 40 HP air cooled engine.

 

[Xfaxman]

This isn't a transmission issue. It isn't running right.

Define "It isn't running right".

Will the RPM go higher in neutral?

 

[mountainguyed67]

By not running right I mean it does not sound normal, it is not smooth, and it is not strong, takes too much time to get to full throttle. You did not watch the video?

And yes. A load reduces RPM.

 

[crashz]

Does it smoke? If its an air restriction, should be heavy black smoke. No smoke, possibly a fuel problem.

 

[Xfaxman]

I watched the video and listened to the engine. Was it in neutral when you mashed the pedal?

I asked about RPM increase because it might not be getting enough fuel.

Is the fuel tank vent working? Try leaving the cap loose and see if it runs better.

 

[mountainguyed67]

Is the fuel tank vent working? Try leaving the cap loose and see if it runs better.

Dunno. I will try that. I will go through this and make a list of what you guys suggested.

 

[mountainguyed67]

I got a diverter valve, and looked into where it will need to go. I know which hoses need to go where, I need to mount it and take measurements for hoses to be made. I have an equipment dealer service manager friend saying to make hoses all the way out. Mine has the clamp blocks like in the far left picture, but no tubes. The hoses hanging down in that picture are for forklift side shift. I would need separate hoses with elbow fittings to make the same routing. Then what? Wire the hose to the clamp blocks to keep it secure? The clamp block corners would dig into the hoses eventually. I posed the same questions to him, no response yet. I like the cleanness and secure, durable fastening of the tubing. I know it is not as straight forward to accomplish though. I plan on using a momentary foot switch, and then the dump lever will clamp and unclamp the logs. Pushing forward to clamp.

 

[mountainguyed67]

Got the manual now.

 

[BravoXray]

Sounds to me like it has a dead cylinder.
Do you have an IR temperature gun?
Check each exhaust port to find the (cold) dead one.

 

[mountainguyed67]

Sounds to me like it has a dead cylinder.
Do you have an IR temperature gun?
Check each exhaust port to find the (cold) dead one.

You’re not the first one to say that.
I don’t have an IR gun.
Other methods were suggested to find it.

I might go up next week, I’ll make a list of forum members suggestions, and also do what the troubleshooting section in the new manual says.