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04 asv rc60 Lift arms will not go up all other functions…

Customer Question
04 asv rc60 Lift...

04 asv rc60 Lift arms will not go up all other functions work properly

Mechanic's Assistant: What is the complete model and serial number of your machine?

I don't have that information currently

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

Yes, rebuilt the joystick thinking I had a stuck plunger

Submitted: 4 years ago.Category: Construction and Road Equipment
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Answered in 37 minutes by:
3/22/2018
Mechanic: Curtis B., Technician replied 4 years ago
Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 43,356
Experience: Technican turned service manager with multiple lines of equipment and rental units.
Verified

Hello! Let's see if we can work together and come to a satisfactory conclusion!

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Customer reply replied 4 years ago
Sounds good
Mechanic: Curtis B., Technician replied 4 years ago

The bucket works k, but the boom will not raise, and the valve spool is not locked? Have you tested the two lift cylinders for internal leakage? Either cylinder can have internal leakage and keep the unit from raising.

To do a quick test, remove one of the hoses, on the rod end of a cylinder, try to raise the boom, and if oil pours from the open hole, the cylinder is bad if oil pours from the hose that as removed, the opposite cylinder would be leaking.

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Customer reply replied 4 years ago
How do I check the valve spool?
Mechanic: Curtis B., Technician replied 4 years ago

You would have to physically see if it is moving when you operate the hand or foot control.

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Customer reply replied 4 years ago
It has a joystick
Mechanic: Curtis B., Technician replied 4 years ago

Cable operated, or hydraulic hoses to valve body?

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Customer reply replied 4 years ago
Hydraulic hoses
Mechanic: Curtis B., Technician replied 4 years ago

Pilot controls, so the spool ends are enclosed.I would do cylinder test, if oil is leaking, the joystick is working.

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Customer reply replied 4 years ago
The motor labors when I push arms down but absolutely nothing up.
Mechanic: Curtis B., Technician replied 4 years ago

I'm going to step out on a limb, and say you have a piston loose on one of the cylinder rods. Down, the piston is tight and pressure builds, so engine labors, on raise, the piston moves, and oil bypass and no pressure is produced,

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Customer reply replied 4 years ago
I'm not with the machine for another hour I will remove a line on one cylinder and see what happens and get back to you
Mechanic: Curtis B., Technician replied 4 years ago

OK>

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Customer reply replied 4 years ago
Ok disconnected rod end hydraulic hose and as soon as I started it ,it shot fluid across the shop without touching the joystick.
Mechanic: Curtis B., Technician replied 4 years ago

From hose or cylinder?From hose, coming from the opposite cylinder.

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Customer reply replied 4 years ago
you think the opposite cylinder has an issue?
Mechanic: Curtis B., Technician replied 4 years ago

Yes, Unless that was the pressure hose, and not the return in that position.

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Customer reply replied 4 years ago
How do I know?Should there be pressure if the joystick hasn't been activated/ neutral?
Mechanic: Curtis B., Technician replied 4 years ago

No, should not be pressure.

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Customer reply replied 4 years ago
Well I have pressure�� what does that mean?
Mechanic: Curtis B., Technician replied 4 years ago

That the control valve is not in neutral. Joystick/pilot controls are energizing the valve. But seems like both open holes, the cylinder and the hose would have had pressure,??

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Customer reply replied 4 years ago
Nothing but a drip out of the cylinder. Joystick is in neutral, what Now?
Mechanic: Curtis B., Technician replied 4 years ago

If the hose was from the opposite cylinder, I would check the cylinder!

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Customer reply replied 4 years ago
I will do that tomorrow and let you know what I find, thank you and have a good evening.
Mechanic: Curtis B., Technician replied 4 years ago

OK>

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Customer reply replied 4 years ago
Well I got a chance to work on it and figured by disconnecting the other side I should get opposite results confirming your thoughts on it being the cylinder however I got the same results pressure from the hose, any thoughts?
Mechanic: Curtis B., Technician replied 4 years ago

The control valve or pilot valve is open, letting the hose get pressure from the valve, with pressure on the wrong side of the piston, the cylinder can not move.

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Customer reply replied 4 years ago
How do I confirm which one
Mechanic: Curtis B., Technician replied 4 years ago

Take the pilot hose off the at the boom spool and see if it has pressure, if the pilot hose has pressure, it is the pilot valve problem.

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Customer reply replied 4 years ago
Ok
Mechanic: Curtis B., Technician replied 4 years ago

OK>

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Customer reply replied 4 years ago
Where would I find the pilot valve? I can't find anything in my parts breakdown called a pilot valve, could it be called something else?
Mechanic: Curtis B., Technician replied 4 years ago

It is your joystick.

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Customer reply replied 4 years ago
Ha,ha , no pressure there .Now Where?
Mechanic: Curtis B., Technician replied 4 years ago

To the control valve, is the boom spool broken? Has to be a reason there is pressure on the wrong side of the cylinder when the engine is running.

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Customer reply replied 4 years ago
Forget my last comment I had the lines off but never started it but did have a steady flow of fluid not running coming from all the lines
Mechanic: Curtis B., Technician replied 4 years ago

OK>

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Curtis B.
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Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 43,356
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Experience: Technican turned service manager with multiple lines of equipment and rental units.

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