2007 L180 Aux issue

[Dewboy08]

Hello. My L180 aux has an issue. It has the right handle to engage. When I hooked up a grapple bucket the other day and go to use it, it boggs down the machine and kills it. It does the same thing if nothing is hooked up as well. It is getting oil to the grapple. Talked to the mechanic and he is wondering if it might be stuck in high flow and tryin to shoot to much fluid. I do here the pump come on when I turn the high flow switch on. He said maybe the solenoid is stuck open. Just trying to see if anyone might know before I take it to them to work on. Thanks

 

[Dewboy08]

We have checked the high flow. It seems to be working. Not sure what else to look for. Boom and bucket work just fine.

 

[Tazza]

We have checked the high flow. It seems to be working. Not sure what else to look for. Boom and bucket work just fine.

I wouldn't have thought the aux hydraulics could load the engine down enough to stall it, even with high flow engaged.
Does it still have good power driving around and into piles of dirt, giving it a good load?

 

[Dewboy08]

I wouldn't have thought the aux hydraulics could load the engine down enough to stall it, even with high flow engaged.
Does it still have good power driving around and into piles of dirt, giving it a good load?

Yeah, everything else is strong. Trying to use a grapple, rather it’s hooked up or not it will kill the Machine. Seems like it’s not bypassin. We are baffled.

 

[Dewboy08]

I wouldn't have thought the aux hydraulics could load the engine down enough to stall it, even with high flow engaged.
Does it still have good power driving around and into piles of dirt, giving it a good load?

Is there a fuse panel in the engine compartment somewhere? People say check those fuses but I’m not finding it.

 

[Mike10]

Is there a fuse panel in the engine compartment somewhere? People say check those fuses but I’m not finding it.

Not sure how pilot controls are setup, but if you have mechanical controls, there are no electrical components to the aux hyd. You have mechanical linkage to the control valve spool which has no lock out like the boom and bucket. There is a switch on that spool but it only is there to shut the engine off if you get out of the seat with the aux hydraulics engaged and have not pushed the over ride button. You have a blockage somewhere in the circuit and more than likely the couplers. Not all flat face couplers are compatible, they may hook up but may not open.

 

[Dewboy08]

Not sure how pilot controls are setup, but if you have mechanical controls, there are no electrical components to the aux hyd. You have mechanical linkage to the control valve spool which has no lock out like the boom and bucket. There is a switch on that spool but it only is there to shut the engine off if you get out of the seat with the aux hydraulics engaged and have not pushed the over ride button. You have a blockage somewhere in the circuit and more than likely the couplers. Not all flat face couplers are compatible, they may hook up but may not open.

Sorry, yeah it’s mechanical, right handle to engage. With nothing hooked up, it kills the engine also, is that normal? It does the exact same rather I have something hooked up or not. Is there a way to test couplers other than replacing them? We are going to mess with again tomorrow. I appreciate the info.

 

[Mike10]

Sorry, yeah it’s mechanical, right handle to engage. With nothing hooked up, it kills the engine also, is that normal? It does the exact same rather I have something hooked up or not. Is there a way to test couplers other than replacing them? We are going to mess with again tomorrow. I appreciate the info.

If the engine labors before dying, then you have a blockage in the hydraulic circuit. If the engine just dies then I would suspect the aux overide electrical circuit is not working. When starting power goes from the instrument panel through the switch on the control valve aux spool. With the aux spool in the neutral position power then goes to the fuel shut off solenoid on the injection pump. Once the engine is running a secondary circuit from the instrument panel sends power to the fuel shut off solenoid on the injection pump. As long as you are in the seat with the seat belt fastened the engine will remain running even with the aux handle engaged. Once you attempt to leave the seat the instrument panel stops sending power through the aux over ride circuit and the engine will die if you have not pressed the aux over ride switch on the instrument panel. If someone has done some creative wiring to bypass any of the safety switches the instrument panel may not see that you are in the seat. You might try pressing the aux over ride button on the instrument panel and see if the aux then works. Since the engine starts and runs, I would believe the underlying electrical cirucuits are working as they should.

 

[Dewboy08]

If the engine labors before dying, then you have a blockage in the hydraulic circuit. If the engine just dies then I would suspect the aux overide electrical circuit is not working. When starting power goes from the instrument panel through the switch on the control valve aux spool. With the aux spool in the neutral position power then goes to the fuel shut off solenoid on the injection pump. Once the engine is running a secondary circuit from the instrument panel sends power to the fuel shut off solenoid on the injection pump. As long as you are in the seat with the seat belt fastened the engine will remain running even with the aux handle engaged. Once you attempt to leave the seat the instrument panel stops sending power through the aux over ride circuit and the engine will die if you have not pressed the aux over ride switch on the instrument panel. If someone has done some creative wiring to bypass any of the safety switches the instrument panel may not see that you are in the seat. You might try pressing the aux over ride button on the instrument panel and see if the aux then works. Since the engine starts and runs, I would believe the underlying electrical cirucuits are working as they should.

The blockage is starting to sound more like it. If you feather the handle the machine Boggs down, but if you pull the handle all the way it kills it. So maybe we start with the couplers.

 

[Dewboy08]

If the engine labors before dying, then you have a blockage in the hydraulic circuit. If the engine just dies then I would suspect the aux overide electrical circuit is not working. When starting power goes from the instrument panel through the switch on the control valve aux spool. With the aux spool in the neutral position power then goes to the fuel shut off solenoid on the injection pump. Once the engine is running a secondary circuit from the instrument panel sends power to the fuel shut off solenoid on the injection pump. As long as you are in the seat with the seat belt fastened the engine will remain running even with the aux handle engaged. Once you attempt to leave the seat the instrument panel stops sending power through the aux over ride circuit and the engine will die if you have not pressed the aux over ride switch on the instrument panel. If someone has done some creative wiring to bypass any of the safety switches the instrument panel may not see that you are in the seat. You might try pressing the aux over ride button on the instrument panel and see if the aux then works. Since the engine starts and runs, I would believe the underlying electrical cirucuits are working as they should.

Well, it’s not the couplers. Any other ideas wht it could be?