Bobcat TL3870 D4903 Error Code
D4903 Error Code
Park Brake Reserve Pressure Valve Relay Feedback Error Off is the main cause of D4903 error.A significant number of consequences can be suffered due to an overheating engine with code D4903. The problem might be a blown gasket or something related to the fuel tank.
Tip For TL3870 Model
The overload warning device (if equipped) senses
hydraulic pressure in the boom lift circuit. When the
hydraulic pressure in the boom lift circuit reaches a
predetermined pressure setting, a buzzer will sound that
indicates an overload condition.
If the buzzer sounds, immediately move the arm closer to
the excavator and lower the boom. Reduce the size of the
load before attempting to re-lift the load.