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Are u buddy I have a 320b l excavator serial number 4mr00692…

Hey how are u buddy...
Hey how are u buddy I have a 320b l excavator serial number 4mr00692 the hydraulics don’t work I changed the hydro switch lock that looks like it’s working cause I put it up and it won’t start Bt once down it starts Bt all the hydraulics are not working I’m not sure what solnioid to check or where to go please let me know
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Answered in 7 hours by:
3/12/2022
Mechanic: catmastertech, Technician replied 6 months ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 4,007
Experience: Field service technician for CAT 19 years.
Verified
Hello again and thank you for requesting me. I will find an image to help you with this and post back shortly. 

Thanks, Don

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Mechanic: catmastertech, Technician replied 6 months ago

When hydraulic activation control valve is placed in the UNLOCKED position, solenoid valve is energized.

When hydraulic activation control lever is in the LOCKED position, solenoid valve is de-energized.

(###) ###-####VALVE GP-SOLENOID,

PART OF(###) ###-####VALVE GP-SELECTOR

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Mechanic: catmastertech, Technician replied 6 months ago

Your serial number looks like a grey market unit for another country, this information may not be correct but, it usually is close.

-------

Thank you for using JustAnswer, if you do need further help, please let me know.
If you are satisfied with my service, please take a moment to provide a rating.
Thanks again, Don
CATMASTERTECH

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Customer reply replied 6 months ago
Ok let me check on that mondayShould I check for the pump pressure and if so how much does it needWhere do I test for the main hydraulic pump at any pics or should I try locate that hydraulic valve first how much Voltage should the solenoid get to unlock
Mechanic: catmastertech, Technician replied 6 months ago

This is just an ON/OFF solenoid and will have battery voltage. (24 volts)

This is only suppling pilot pressure to the joysticks and pedals. To test the pressure, connect to the test port on the pilot filter housing (the smallest filter) and you should have 575 psi with the engine running.

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Customer reply replied 6 months ago
Ok I will check all that
Mechanic: catmastertech, Technician replied 6 months ago

Great! Glad to help!

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Customer reply replied 6 months ago
If no pilot pressure where do I check after that
Mechanic: catmastertech, Technician replied 6 months ago
The pilot pump. 

Test pressure at the pilot oil filter. Small filter beside the pump.

catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 4,007
Experience: Field service technician for CAT 19 years.
Verified
catmastertech and 87 other Construction and Road Equipment Specialists are ready to help you
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Customer reply replied 6 months ago
Thanks pilot pump bad
Mechanic: catmastertech, Technician replied 6 months ago

Glad to hear you found the problem. Thanks for the update.

--------------

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If you are satisfied with my service, please take a moment to provide a rating.
Thanks again, Don
CATMASTERTECH

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