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Just bought a CAT 31B market excavator. I need to swap the…

Just bought a CAT...

Just bought a CAT 31B gray market excavator. I need to swap the controls to BHL pattern

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

CAT 311B serial 6LK18461 PIN 8HR0143

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

Yes myself

Mechanic's Assistant: Anything else you want the equipment mechanic to know before I connect you?

I have a 4 way pattern selector: SAE, MHI, KOB, Former SCM. I need the BHL pattern.

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Answered in 25 minutes by:
11/29/2018
Mechanic: catmastertech, Technician replied 3 years ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 3,994
Experience: Field service technician for CAT 19 years.
Verified

Hello,

Since this is gray market, I am not sure this is the same but, if you remove the guard under the cab and locate a manifold block that contains the lines from each joystick, look at the rear connections for some colored tags. If it has the tags, swap the lines as follows,

Switch RED L1 STICK OUT with GREEN R3 BOOM DOWN
Switch BLUE L3 STICK IN with ORANGE R1 BOOM UP

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Mechanic: catmastertech, Technician replied 3 years ago

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 3 years ago
Wow I hope this works.
Mechanic: catmastertech, Technician replied 3 years ago

It should as this has been common to US machines back to the E110

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Customer reply replied 3 years ago
This same machine I have a problem with the monitor. When the machine is cold, the digital monitor is black and there is a buzzer sounding. After about 5 minutes the monitor lights up and the buzzer quits. All is well after it is warm.I checked to monitor for current and stored codes and there are none.
Mechanic: catmastertech, Technician replied 3 years ago

Remove side panel and check your connections. Clean any corrosion or replace terminals. Look at the ECM under the seat and see if the red light is on. If it is, the ECM is bad. Yellow light means communications issue to monitor. Green means the ECM has power.

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Customer reply replied 3 years ago
Very good. Will work on these items tomorrow. Thank you. You are good.
Mechanic: catmastertech, Technician replied 3 years ago

Thanks, ***** ***** could help.

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Customer reply replied 3 years ago
You have CAT sis?
Mechanic: catmastertech, Technician replied 3 years ago

Yes.

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Mechanic: catmastertech, Technician replied 3 years ago

My list is showing pilot valves below the levers with steel tubes to the valves. Is that correct?

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Customer reply replied 3 years ago
I have never looked. I would think it is steel lines.
Mechanic: catmastertech, Technician replied 3 years ago

Go below the cab or maybe behind the cab and look for the pilot lines from the steel tubes to the control valves.

I don't have a cheat sheet for these as they were before my time but, use a cap and plug to block off one line at a time to identify which function stops working then you can swap the boom and stick as needed to get the BHL config. You may need to have some hoses fabricated to make this work.

I heard of it done on the 215 machines but, I haven't worked on but a couple of these in my 25 years in the field.

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Customer reply replied 3 years ago
Thanks
Mechanic: catmastertech, Technician replied 3 years ago

You're welcome.

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Mechanic: catmastertech, Technician replied 3 years ago

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

catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 3,994
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 3 years ago
It worked I got the controls changed over on the 311B.
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