Bobcat 337: Troubleshooting and Maintenance Guide

[MikePhua]

The Bobcat 337 is a popular compact track excavator known for its versatility, compact size, and solid performance. Whether it's digging, lifting, or trenching, the Bobcat 337 is widely used in a variety of applications. However, like any piece of heavy equipment, it can experience issues that require troubleshooting and repair. This guide will delve into the common issues that may arise with the Bobcat 337, the components that need regular attention, and how to keep it in top working condition.
Key Features of the Bobcat 337
The Bobcat 337 is a mini-excavator with a maximum operating weight of around 8,000 pounds, making it suitable for tight spaces and smaller job sites. Some key features include:

• Hydraulic system: Provides powerful lifting and digging capabilities.
  
• Track system: Offers stability on uneven terrain.
  
• Ergonomically designed controls: Allows for ease of operation and precision.
  
• Compact size: Ideal for residential or urban construction projects.
  

Despite its small size, the Bobcat 337 offers big performance, but its compactness means that certain components are more susceptible to wear and tear.
Common Issues with the Bobcat 337
Over time, the Bobcat 337 may experience several issues related to its engine, hydraulics, tracks, or electrical systems. Below are some common issues with their corresponding troubleshooting steps.
1. Engine Performance Problems
Engine performance issues can stem from various causes, including fuel, air intake, or electrical problems. If the Bobcat 337's engine is sluggish, stalling, or not starting at all, it’s important to systematically address these potential causes.
Symptoms:

• Engine cranks but fails to start
  
• Engine stalling or poor idling
  
• Loss of power under load
  

Possible Causes:

• Fuel system issues: Clogged fuel filters, water in the fuel, or fuel pump failure.
  
• Air intake blockage: Dirty air filters or intake pipes.
  
• Electrical system failure: Issues with wiring, battery, or alternator.
  

Solutions:

• Inspect and replace fuel filters as needed.
  
• Check for any fuel contamination and drain the fuel tank if necessary.
  
• Clean or replace air filters.
  
• Test the battery and charging system to ensure proper voltage and current.
  

2. Hydraulic System Issues
The hydraulic system is crucial for the movement of the arm, boom, and bucket. Any issues in this system will affect the machine's ability to operate efficiently.
Symptoms:

• Slow or erratic movement of the arm or bucket
  
• Loss of lifting power
  
• Unusual noises (whining, grinding, etc.)
  

Possible Causes:

• Low or contaminated hydraulic fluid
  
• Leaks in hydraulic lines or fittings
  
• Faulty hydraulic pumps or valves
  

Solutions:

• Check the hydraulic fluid levels and ensure the fluid is clean and free of debris.
  
• Inspect all hydraulic hoses for cracks or leaks and replace any damaged hoses.
  
• Test the hydraulic pumps and valves for proper operation.
  

3. Track and Undercarriage Wear
The tracks on the Bobcat 337 allow it to operate smoothly over rough ground. However, like all tracked machines, the undercarriage and tracks are subject to wear and require regular attention.
Symptoms:

• Uneven track wear or damage
  
• Tracks slipping off
  
• Jerky movement or difficulty moving
  

Possible Causes:

• Track tension issues: Tracks may be too tight or too loose.
  
• Undercarriage wear: Worn rollers, idlers, or sprockets.
  
• Debris in the tracks: Dirt or rocks lodged in the undercarriage can cause wear.
  

Solutions:

• Regularly check the track tension and adjust it to ensure it's within the correct range.
  
• Inspect the undercarriage components such as rollers, sprockets, and idlers for wear and replace them as needed.
  
• Clean out any debris in the undercarriage after use.
  

4. Electrical System Malfunctions
Electrical issues on the Bobcat 337 can cause a range of problems, from starting failures to malfunctioning lights and warning systems. Identifying and fixing electrical problems early can prevent more significant issues down the road.
Symptoms:

• Failure to start or engine not turning over
  
• Warning lights staying on or flashing
  
• Malfunctioning instruments (e.g., fuel gauge, temperature gauge)
  

Possible Causes:

• Loose or corroded battery terminals
  
• Faulty alternator or starter motor
  
• Issues with the wiring harness or sensors
  

Solutions:

• Inspect and clean the battery terminals to ensure a good connection.
  
• Test the alternator and starter motor to ensure proper function.
  
• Inspect the wiring harness for frayed wires or corrosion and replace any damaged components.
  

5. Cooling System Problems
The cooling system is responsible for keeping the engine at an optimal temperature. If the engine overheats, it can lead to permanent damage, so it’s crucial to maintain the system.
Symptoms:

• Engine overheating
  
• Coolant leaks
  
• High coolant temperature readings
  

Possible Causes:

• Low coolant levels
  
• Clogged or dirty radiator
  
• Faulty thermostat or water pump
  

Solutions:

• Regularly check the coolant levels and refill as needed.
  
• Clean the radiator to remove any debris or dirt that may be obstructing airflow.
  
• Test the thermostat and water pump for proper operation.
  

Maintenance Tips for the Bobcat 337
Preventive maintenance is essential to extend the lifespan of the Bobcat 337 and ensure it runs efficiently. Here are some useful maintenance tips:

1. Regular Fluid Changes:
   • Change the engine oil and filters according to the manufacturer's recommendation.
     
   • Keep the hydraulic fluid and filters in good condition, as contaminated fluid can severely affect performance.
     
2. Track and Undercarriage Care:
   • Inspect and clean the tracks regularly.
     
   • Check the undercarriage for wear and tear, especially after working on rough or abrasive surfaces.
     
3. Electrical System Maintenance:
   • Ensure the battery is clean and well-maintained.
     
   • Check fuses and wiring regularly for damage.
     
4. Air Filter and Cooling System:
   • Replace air filters regularly to avoid engine performance issues.
     
   • Keep the radiator clean and ensure the cooling system is functioning properly.
     
5. Hydraulic System Checks:
   • Keep hydraulic components clean and check for leaks.
     
   • Regularly inspect the hoses and fittings for wear.
     

Conclusion: Keeping the Bobcat 337 Running Strong
The Bobcat 337 is a durable and reliable mini-excavator, but like all machines, it requires regular care and maintenance to keep it in peak condition. Addressing issues like engine performance problems, hydraulic malfunctions, track wear, and electrical faults promptly can help you avoid costly repairs and downtime. By following routine maintenance practices and troubleshooting common problems, you can maximize the longevity and efficiency of your Bobcat 337.
Remember, regular inspections, fluid changes, and careful monitoring of components like the tracks and electrical system will keep the machine performing its best, ensuring that it continues to be a valuable asset for your construction projects.