CAT 257B Issues: Engine Hard to Turn When Warm & Lift Arm Cylinder Leakage

[MikePhua]

Introduction
A CAT 257B skid steer operator faces two main problems: difficulty starting or turning the engine when warm, and lift arm cylinders slowly leaking down during operation. This article explores possible causes and solutions shared by experienced users.
Engine Hard to Turn When Warm

• The machine starts and runs fine when cold but struggles to turn over once warmed up.
  
• Possible causes include battery or starter issues, electrical faults, or engine overheating.
  
• Suggestions include checking battery condition and connections, testing the starter motor, and inspecting the engine cooling system.
  
• Some users recommend verifying fuel system function and glow plug operation if applicable.
  

Lift Arm Cylinders Leaking Down

• The lift arms gradually lower on their own while the machine is running, indicating hydraulic leakage.
  
• Likely causes include worn or damaged seals inside the lift cylinders, faulty control valves, or contamination in the hydraulic fluid.
  
• Recommended steps are to inspect and possibly rebuild or replace the lift arm cylinders.
  
• Cleaning or replacing hydraulic filters and checking the hydraulic fluid condition is also advised.
  

User Experiences and Advice

• Several operators have faced similar issues and emphasize regular maintenance to prevent seal and hydraulic failures.
  
• Some mention that worn seals in the cylinders are a common wear point, especially on older machines.
  
• Addressing electrical and hydraulic system issues promptly can prevent further damage and costly repairs.
  

Conclusion
The CAT 257B's warm start difficulty and lift arm cylinder leaks are manageable issues with proper diagnosis and maintenance. Checking battery and starter health, along with thorough inspection of hydraulic components, can restore reliable operation and extend machine life.