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Bobcat S740 D9403 Error Code

D9403 Fault Code Meaning :

Trailer Brake Supplementary Line Relay Error Off

D9403 Error Code

Trailer Brake Supplementary Line Relay Error Off is the main cause of D9403 error.A significant number of consequences can be suffered due to an overheating engine with code D9403. The problem might be a blown gasket or something related to the fuel tank.

Bobcat S740 Photo

Tip For S740 Model

If the engine stops, the boom / bucket (attachments) can be lowered to the ground using hydraulic pressure in the accumulator.

The control console must be in the locked down position, and the key switch in the ON position.

Use the control lever to lower the boom.

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