Bobcat 553 D7521 Error Code
D7521 Error Code
Drive Left Joystick Y-Axis Out of Range High is the main cause of D7521 error.A significant number of consequences can be suffered due to an overheating engine with code D7521. The problem might be a blown gasket or something related to the fuel tank.
Tip For 553 Model
It is recommended in cold weather to cycle the glow plugs twice before attempting to start the engine. This will allow for additional heating time for cold weather starting.