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Working on a kx 121-2 with no joy stick power or travel

Customer Question
speed Chang replaced valve with...
Working on a kx 121-2 with no joy stick power or travel speed Chang replaced valve with solenoids and filters and fluid has power to solenoids
Submitted: 7 years ago.Category: Construction and Road Equipment
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Answered in 31 minutes by:
11/21/2015
Mechanic: Curtis B., Technician replied 7 years ago
Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 43,924
Experience: Technican turned service manager with multiple lines of equipment and rental units.
Verified

Are all function lost? Or just slow? Has the pump drive been checked?

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Customer reply replied 7 years ago
No joy stick power no slow speed all mechanical linkage on main valves work like travel front blade thumb control
Mechanic: Curtis B., Technician replied 7 years ago

Excavator has drive pump and hydraulic pump/ Is the smaller hydraulic pump turning?

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Customer reply replied 7 years ago
Pump is working
Mechanic: Curtis B., Technician replied 7 years ago

I will opt out. Sorry.

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Mechanic: Dan, Technician replied 7 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 15,097
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified

Hi my name is***** you still need help with this? If so let me know the serial number of your machine. Also remove the hydraulic return filter and check for fine metal indicating a pump or component failure occuring. I see you say the pump is working but there still can be a pump issue if all your functions are running slow. The pump output can be less than specs causing your problem and if it is producing metal it can contaminate the rest of the system as well. Have you taken pressures with test gauges yet? If so what are you getting for pressures?

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Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 15,097
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Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.

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