Common Issues with the Bobcat 753 Skid Steer and How to Fix Them

[MikePhua]

The Bobcat 753 is one of the most widely used skid steer loaders in the world, known for its durability, versatility, and performance. However, like all heavy equipment, the Bobcat 753 can encounter issues over time, particularly as it sees more hours of operation. These issues can range from minor inconveniences to more severe mechanical failures, but understanding common problems and knowing how to address them can significantly extend the lifespan of your machine. In this article, we will explore the most common issues faced by Bobcat 753 owners and operators, and provide solutions to help you get your machine back to optimal performance.
Engine Starting Problems
One of the most common problems reported with the Bobcat 753 is difficulty starting the engine. When an engine fails to start, it can be frustrating, especially if you're on a tight deadline or in the middle of a project.
Symptoms:

• Engine cranks but does not start
  
• No engine cranking at all
  
• Difficulty starting after prolonged use
  

Possible Causes:

1. Battery Issues: A weak or dead battery is the first thing to check. Over time, the battery can lose its charge, especially if it hasn't been properly maintained.
   Solution: Check the battery voltage using a multimeter. If the voltage is low, try charging the battery. If the battery is old and no longer holds a charge, replace it with a new one.
   
2. Fuel System Issues: Clogged fuel filters, a failing fuel pump, or air in the fuel lines can prevent the engine from starting.
   Solution: Replace the fuel filter if it appears dirty or clogged. Inspect the fuel lines for leaks or damage, and check the fuel pump to ensure it is delivering the correct amount of fuel to the engine.
   
3. Starter Motor Problems: If the starter motor is malfunctioning, the engine may fail to crank.
   Solution: Inspect the starter motor for wear. If it appears damaged, replace it. Also, check the wiring connections to ensure there are no loose or corroded connections.
   

Hydraulic System Issues
The hydraulic system is critical to the operation of the Bobcat 753, as it powers the loader arms and other attachments. Issues with the hydraulic system can cause significant downtime and affect the machine’s ability to perform tasks.
Symptoms:

• Slow or unresponsive loader arms
  
• Hydraulic fluid leaks
  
• Difficulty operating attachments
  

Possible Causes:

1. Low Hydraulic Fluid: Low fluid levels can cause the hydraulic system to operate slowly or unevenly.
   Solution: Check the hydraulic fluid level and top it up as needed. Make sure to use the manufacturer-recommended hydraulic fluid to ensure the best performance.
   
2. Hydraulic Pump Failure: A failing hydraulic pump can lead to a lack of power in the system, causing slow response times and difficulty with lifting.
   Solution: If the hydraulic pump is suspected to be faulty, it may need to be replaced. This is a more advanced repair that may require professional assistance.
   
3. Hydraulic Leaks: Leaks in the hoses or fittings can cause a drop in pressure and performance.
   Solution: Inspect the hydraulic hoses and fittings for any visible signs of wear, cracks, or leaks. Replace any damaged components and make sure all connections are properly tightened.
   

Transmission Problems
Transmission issues are less common but can still occur in the Bobcat 753, especially if the machine has been subjected to heavy loads or improper operation.
Symptoms:

• Difficulty shifting between gears
  
• Loss of power or speed
  
• Unusual noises coming from the transmission
  

Possible Causes:

1. Worn Transmission Fluid: Over time, transmission fluid can become contaminated or degrade, leading to poor transmission performance.
   Solution: Check the transmission fluid level and condition. If the fluid is dirty or low, replace it with the correct type as specified in the operator’s manual.
   
2. Transmission Pump Failure: If the transmission pump is failing, it can cause a loss of pressure, resulting in a lack of power and difficulty shifting gears.
   Solution: If the pump is suspected to be faulty, it may need to be replaced. This can be a complex repair, so it may be worth consulting a professional technician.
   
3. Faulty Solenoid or Valve: The solenoids or valves controlling the transmission may malfunction, causing erratic shifting or loss of power.
   Solution: Inspect the transmission control solenoids and valves for any signs of damage or malfunction. Replace any faulty parts.
   

Electrical System Failures
Electrical issues are common across all types of heavy machinery, and the Bobcat 753 is no exception. Problems can range from faulty sensors to wiring issues, which can disrupt the machine's operation.
Symptoms:

• Lights, gauges, or indicators not working
  
• Engine misfires or runs erratically
  
• Unresponsive control panel or buttons
  

Possible Causes:

1. Blown Fuses: A blown fuse can cut power to critical electrical components, leading to failure in certain functions.
   Solution: Inspect the fuses and replace any that are blown. Make sure to use the correct amperage fuses as specified in the manual.
   
2. Loose or Corroded Wiring: Over time, wiring connections can become loose or corroded, leading to intermittent electrical failures.
   Solution: Inspect the wiring connections for signs of corrosion, wear, or damage. Clean or replace any corroded wires, and ensure all connections are secure.
   
3. Faulty Alternator: A failing alternator can prevent the battery from charging, leading to power loss in the electrical system.
   Solution: Check the alternator for proper operation. If it is not charging the battery, it may need to be replaced.
   

Overheating Issues
Overheating is a problem that can affect the performance and longevity of the Bobcat 753, especially during long hours of operation or under heavy loads.
Symptoms:

• Engine temperature gauge rising above normal
  
• Loss of power or sluggish operation
  
• Engine shutting down due to overheating
  

Possible Causes:

1. Low Coolant Levels: Low coolant levels can prevent the engine from dissipating heat effectively, leading to overheating.
   Solution: Check the coolant level and top it up as necessary. Ensure there are no leaks in the cooling system.
   
2. Dirty Radiator: A dirty or clogged radiator can reduce airflow, preventing the engine from cooling properly.
   Solution: Clean the radiator regularly to remove dirt, debris, and build-up that could obstruct airflow.
   
3. Faulty Thermostat: A malfunctioning thermostat may fail to regulate the engine temperature, causing it to overheat.
   Solution: Test the thermostat and replace it if necessary to restore proper engine cooling.
   

Real-World Example: Solving a Bobcat 753 Hydraulic Issue
A contractor working on a construction project with a Bobcat 753 faced slow hydraulic response in the loader arms. After inspecting the system, they discovered that the hydraulic fluid was low, which was causing the sluggish performance. By topping up the fluid and replacing the old filter, the machine returned to full functionality, helping the contractor finish the project on time. This serves as an example of how regular maintenance and timely troubleshooting can prevent downtime.
Conclusion
The Bobcat 753 is a reliable skid steer that, like all machinery, requires regular maintenance and prompt attention to issues that arise. From engine starting problems and hydraulic system issues to transmission and electrical failures, understanding the common problems and their solutions can keep your Bobcat 753 running smoothly and prevent costly repairs. Regular inspections, proper fluid levels, and replacing worn components on time are essential practices that will extend the life of your machine and keep it performing at its best. By addressing problems early, you can minimize downtime and ensure your Bobcat 753 continues to be a valuable tool on the job site.