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catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2334
Experience:  Field service technician for CAT 19 years.
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Hydraulics in the arm of my 247 cat doesn't work what could

Customer Question

Hydraulics in the arm of my 247 cat doesn't work what could it be. The hydraulics work on the rest of the machine. The pump was replaced 2 years ago
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 1 year ago.


Do you have any flashing lights?

Have you checked the door switch?

What is the full machine serial number?

Customer: replied 1 year ago.
No flashing lights .
The front door is off getting fixed.
Expert:  catmastertech replied 1 year ago.

The door switch must be closed or the bypass plug installed when the door is off.

The switch is used to protect the door from damage by the loader frame and turns off the controls until the door is secure.

The connector to the switch should have a pigtail with a single wire looped in the end. Plug this connector in place of the door harness and the controls should begin working.

The systems does not turn on any light when the door is not closed so, you will not see any warning, only that the hydraulics will not work the implement functions.

If this does not help, please let me know. I will be glad to help all I can.

Customer: replied 1 year ago.
Arms are not moving still anything else you can think of. Everything else moves good.
Expert:  catmastertech replied 1 year ago.

I have seen the detent coil cause this issue too. Attached is how to find the problem for early models (not B models)

If this is not correct for your machine, please post the full machine serial number of your skid steer and I will be glad to find the right one.

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