What should be done if the oil temperature on a Caterpillar 320C excavator becomes too high? How should this issue be handled?

 Many operators encounter the problem of "excessive oil temperature" during excavator operation.

 Excessive oil temperature can even trigger a series of issues, such as thermal deformation of mechanical 

parts and the seizing of moving hydraulic components—caused by reduced clearances resulting from 

differing coefficients of thermal expansion—which leads to operational malfunctions, impaired 

transmission precision in the hydraulic system, and degraded component performance.

 

Caterpillar ET 2026A & 2019C Electronic Technician Diagnostic Software Download and Installation

 Analysis of causes: 

1 The hydraulic oil has not been changed for an extended period. 

2 Hydraulic pump malfunction. 

3 Controller (ECU) malfunction or incorrect settings. 

4 Insufficient oil tank capacity or inadequate heat dissipation surface area; lack of an oil cooling system, 

or a cooling system with insufficient capacity.

 

CAT Comm Adapter3 478-0235 Diagnostics for Caterpillar

Solutions: 

1 If the hydraulic oil in your excavator has not been changed for over 6,000 hours, it must be replaced. 

2 Have the hydraulic pump inspected and adjusted by a professional. 

3 Reset or repair the electronic control unit (ECU). 

 

Caterpillar 18 Digits Factory Password Calculator One-Time Calculate Service