Flu 419 problems. Clutch starter switch and boom not holding position.

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Nick02

Member
43
3
8
Location
Phoenix Arizona
Got only two problems left on my FLU, but I cannot seem to figure them out.
First is the clutch switch, when depressed it sometimes will not start. The switch is fine, continuity wise when depressed. When depressed, sometimes, I can hear a “click” on the passenger side of the engine and it ready for a successful start. Other times I will depress the clutch, I will not hear the click and it will not start. It will always start but sometimes it can take 50 times of depressing the clutch to get the starter area of the motor to “click” before pushing the starter button to get it to turn over. Trying to see of there is a sticky relay or something inside the starter going on but I cannot figure it out.

Second problem, I am new to the world of backhoe.
My boom cylinders work but will not hold position. The boom will go down with gravity if I let my hand off the lever. The part where you move the cylinder with the lever, control valve assembly (I think that is what it is called) does have a slow leak when sitting. The cylinders have no external leaks. The lever for the boom does make a louder hissing sound when move it compared to all other levers.

Maybe it is an internal leak on both cylinders. Rebuilding the boom cylinders seems simple enough. Will G105528 Case 580C boom cylinder kits work for the M35C?

Fixing the leak in the control assembly scares me, I cannot really find information on it or where I order parts to repair it. Has anyone here done this before?

Thanks!
 

Speedwoble

Member
437
21
18
Location
New Holland, PA
Backhoe has a lot more in common with the 580E. If you look in the FLU parts manual, it lists the CASE part number which can be cross referenced by your case dealer. Hydraulic cylinders generally cannot compress due to an internal leak without an external leak. The reason is the fluid from the piston end would have to flow to the side with the rod, which is a smaller volume. As fluid is incompressible, it will reach steady state and stop moving. so you are looking for an external leak and possibly an internal. Good luck. I have a spare backhoe for parts if you need any.
 

Nick02

Member
43
3
8
Location
Phoenix Arizona
So, according to the SEE manual, Figure 301. Hydraulic Cylinders – Backhoe Boom Cylinder Assembly. G106168 is the boom cylinder part number and that is used on 580B 580C 580D 580E 580SE backhoes. The part number also referenced to repair all the seals in the boom cylinders is 1543265C1

I also figured out that the Control valve assembly has no leak, the dipper cylinder seal is leaking and dripping down onto the controls... opps
G109423 kit will fix that.

Wondering if I should pull the spool valve apart first or the cylinders?
 

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The FLU farm

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First is the clutch switch, when depressed it sometimes will not start. The switch is fine, continuity wise when depressed. When depressed, sometimes, I can hear a “click” on the passenger side of the engine and it ready for a successful start. Other times I will depress the clutch, I will not hear the click and it will not start. It will always start but sometimes it can take 50 times of depressing the clutch to get the starter area of the motor to “click” before pushing the starter button to get it to turn over. Trying to see of there is a sticky relay or something inside the starter going on but I cannot figure it out.
I often have to turn the master switch off and back on again on the Winter SEE, leaving the clutch depressed.
Not enough of a hassle to make me find the real problem (which in my case is likely the master switch).
 

Pinsandpitons

Member
122
7
18
Location
Central Washington
My master switch is a little touchy as well. Though my reading indicated maybe something else? Do you have lights and gauges and what not during these no start situations?

The backhoe control valves are really not that difficult to deal with. It sounds to me like a valve problem. Probably just a missing or damaged O-ring or two. The hard part is getting that valve stack out of the machine.
 

The FLU farm

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Good question. I'm so used to these things that I can't say for sure if the rest comes on or not. But I'd say it does, or I'd remember.

I also need to get into the valve compartment, as one outrigger lever is all but ineffective in the retract direction. Might be quickest to cut a large access hole and then make a cover plate.
 

Pinsandpitons

Member
122
7
18
Location
Central Washington
I’m not sure what the T M says but just take the backhoe off, block it up, and remove the valve block that way. I can’t imagine trying to do it with the implement on the machine.

I was actually asking Nick if his gauges etc. stayed on. I just wondered if the clutch switch and starting solenoid click was a red herring.
 
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