99 Bobcat 873 F-Series lift/tilt issues

[ThomasF]

Please bear with me as I am a DIY/youtube watching/ forum reading mechanic (aka parts changer) and in need of some help.lol

I have a 99 Bobcat 873 F-Series. The problem I'm having is I'll have lift but no lower unless floated (detent?), and along with that the bucket will tilt, down only, regardless of pedal forward or back. Ive noticed since this started happening the auxiliary control is flashing continuously. On initial start up everything runs and operates fine (with the light still flashing), then I'll notice a slight change in sound and then the problem is there again. Any advice/ suggestions would be greatly appreciated.

 

[brdgbldr]

If this is a manual control machine, make sure that you do not have the auxiliaries set to on in the detent position.

 

[ThomasF]

If this is a manual control machine, make sure that you do not have the auxiliaries set to on in the detent position.

I have no action from the auxiliary on/off. Just the led 1 flashing.

 

[brdgbldr]

I have no action from the auxiliary on/off. Just the led 1 flashing.

Not sure what you mean here.

If it is a manually controlled auxiliary with the right lever, move the lever all the way to the left to make sure the detent is not engaged.

The symptoms you have are very similar to the auxiliaries being stuck on.

 

[ThomasF]

Not sure what you mean here.

If it is a manually controlled auxiliary with the right lever, move the lever all the way to the left to make sure the detent is not engaged.

The symptoms you have are very similar to the auxiliaries being stuck on.

My bad, I guess I didn't understand what you meant. The images below are what I have. The auxiliary on/off doesn't react when pressed just get the flashing light on the top led.

 

[ThomasF]

My bad, I guess I didn't understand what you meant. The images below are what I have. The auxiliary on/off doesn't react when pressed just get the flashing light on the top led.

I've tested and replaced solenoids based on other threads I've read and I'm not sure what else to try.

 

[ward]

Having worked on electric over hydrulic units I would be checking voltage to the solenoids then pulling the valve in conjuction with the solenoid and checking the o-ring seals on the valves cartridges, one thing we used to do was to have the engine off and acuate the function and listen for a click of the valve function befor removing the valve and checking voltage to the valves as it always seems the weakest link in the wiring in the system, after that o-ring seals, the light coming on for the auxiliary maybe a short or bad board for that function.

 

[ThomasF]

I'll try that thank you

 

[spitzair]

The flashing LED means there's a problem with your auxiliary hydraulic system. From the symptoms you are describing and the LED flashing it sounds to me like one of the auxiliary solenoids are energized when they are not supposed to be and deahdeading the system. This is also why your lift arms only go up and your bucket only dumps, the oil is taking the path of least resistance which in this case is the cylinders extending. You can tip up the operator cab and disconnect the two auxiliary solenoids on the main hydraulic valve to see if the loader functions return to normal to confirm this and use the machine until you can fix the auxiliary hydraulic issue, you just won't have use of your auxiliary hydraulics…

 

[ThomasF]

Not sure of exactly what fixed it, but I went out yesterday and removed the recently replaced solenoids, inspected them and put them back on with no change. Today went out and the light was not flashing and my hydraulics are working as intended. Idk. Thanks to everyone in the forum who reached out. Greatly appreciated