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My name is ***** *****,I m working on a D5G that the left…

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My name is *****...

My name is ***** *****,I m working on a D5G that the left track stopped moving while grading stone. It had code for the park brake switch, we replace switch, then speed sensor code came up. we replaced it. It now flashes 222 but, still track wont move.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

Not really, machine has 5000 hours on it. Im relaying what my mechanic is telling me ,sorry.

Submitted: 2 years ago.Category: Medium and Heavy Trucks
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2/2/2016
Technician: cat_engines_only, Other replied 2 years ago
cat_engines_only
Category: Medium and Heavy Trucks
Satisfied Customers: 2,578
Experience: Repair CAT machines only
Verified

Hello,

The code 222 is for no codes logged or present.

If the motor is loading and still not moving, you should check for damage to the final drive or possibly the brake. (Normally the brake is not strong enough to hold the motors back.)

Have you checked the track for binding?

Have you checked the final drive for damage?

Does the park brake light go off when you flip the switch?

Do you have a good battery and charging system? Low voltage will prevent the ECM from working correctly.

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Customer reply replied 2 years ago
we have not checked for damage to track or final. The brake light does go out when disengaged. The voltage is at 14 volts. My mechanic is wondering about the steering module because, the right track moves fwd and rev. fine but does nothing when trying a turn.
Technician: cat_engines_only, Other replied 2 years ago

The design of the steering control has one sensor for forward/reverse and one sensor for left/right.

Normally, any issue would cause no steering or no drive. Other problems should log a fault code.

The only way to test the sensors is to use CAT ET program.

Can you hear the motor load the engine? (pump noise increase or engine speed decrease)

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Customer reply replied 2 years ago
the motor does not load the motor, it acts as if the pump is not sending anything to motor. almost like there is no signal for pump to stroke and send pressure to drive motor.
Technician: cat_engines_only, Other replied 2 years ago

Thanks for the reply.

Since it is not signaling the pump, it must be an electrical problem.

If the parking brake switch is turning the light off, then the ECM must be getting the signal.

The only way to proceed from this point is to connect CAT ET and see what is working or not.

No testing can be performed through the code plug.

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Customer reply replied 2 years ago
Thank you for the information!!! We're in the process of getting an ET.
Technician: cat_engines_only, Other replied 2 years ago

You're welcome. If I can help you further, please let me know.

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