Troubleshooting Power Loss in the Bobcat 700: A Comprehensive Guide

[MikePhua]

Introduction: Understanding Power Loss Issues in Skid Steers
The Bobcat 700 series skid steer loaders are widely used in construction, landscaping, and agriculture due to their versatility and reliability. However, like all machinery, they are prone to mechanical issues that can affect performance. One of the most frustrating problems that operators can face is losing power while using the equipment.
Power loss in skid steers can occur suddenly, severely impacting the machine’s ability to perform tasks. Whether it’s a gradual loss of power over time or a sudden drop during heavy lifting or travel, identifying the cause and addressing it promptly is essential for minimizing downtime and ensuring the equipment runs efficiently.
In this article, we’ll explore the potential causes of power loss in the Bobcat 700, how to diagnose the issue, and the steps you can take to fix it.
1. Symptoms of Power Loss in the Bobcat 700
Power loss in the Bobcat 700 can manifest in various ways. Some of the most common symptoms include:

• Sluggish Engine Response: The machine may respond slowly when you engage the throttle, taking longer to accelerate or rev up.
  
• Reduced Lifting Capacity: If the engine struggles to provide the necessary power, you may notice a significant decrease in lifting capacity. The loader may have difficulty picking up heavy materials or lifting attachments.
  
• Unstable Operation: Power loss can lead to erratic movement or jerky operation of the machine. You might notice that the Bobcat struggles to maintain speed or smoothly move from one point to another.
  
• Stalling or Engine Cutoff: A more severe sign of power loss can be the engine stalling during operation. This is a clear indicator that something is wrong, and the machine cannot generate enough power to keep running.
  

2. Diagnosing Power Loss in the Bobcat 700
Proper diagnosis of power loss is essential for pinpointing the root cause. Here are several steps you can take to diagnose the issue effectively:

• Step 1: Check the Fuel System
  A common cause of power loss in any diesel engine is a problem with the fuel system. Start by inspecting the fuel filters. Clogged filters can restrict the flow of fuel to the engine, leading to a decrease in power. If the filters are dirty or clogged, replacing them can often resolve the issue. Also, ensure that the fuel lines are free from blockages and cracks.
  
• Step 2: Inspect the Air Intake System
  A restricted air intake system can severely affect engine performance. Check the air filter to ensure it’s clean and not clogged with dust or debris. A dirty air filter limits the amount of oxygen entering the engine, causing a reduction in combustion efficiency and, consequently, power loss. If necessary, clean or replace the filter.
  
• Step 3: Examine the Battery and Charging System
  While the battery is not directly responsible for power loss in terms of engine performance, a weak or failing battery can affect the overall operation of the Bobcat. If the machine struggles to start or powers down unexpectedly, the battery could be the issue. Check the battery charge and ensure that it’s properly connected to the system. Inspect the alternator as well, as a malfunctioning alternator can lead to an undercharged battery, which might cause the engine to lack sufficient power.
  
• Step 4: Test the Fuel Pump
  The fuel pump is responsible for delivering fuel to the engine at the correct pressure. If the fuel pump is malfunctioning, it may not supply enough fuel, leading to power loss. You can test the pump's performance with a fuel pressure gauge. If the pressure is too low, the pump may need to be replaced or repaired.
  
• Step 5: Check the Engine's Compression
  Engine compression is essential for proper combustion. If the engine is losing power, it may be due to low compression in one or more cylinders. Use a compression gauge to test each cylinder and check for discrepancies. Low compression can be caused by worn piston rings, damaged valves, or a blown head gasket, all of which will need attention from a professional mechanic.
  

3. Common Causes of Power Loss in the Bobcat 700
Several mechanical issues can cause the Bobcat 700 to lose power. Here are some of the most frequent culprits:

• Clogged or Dirty Fuel Filter: Over time, dirt, debris, and contaminants can clog the fuel filter, restricting the flow of fuel to the engine. This results in insufficient fuel being delivered to the engine, causing it to lose power.
  
• Faulty Air Filter: The air filter ensures that only clean air enters the engine for combustion. A clogged air filter reduces airflow, leading to inefficient combustion and power loss.
  
• Low Fuel Quality: If the fuel in the tank is old, contaminated, or of poor quality, it can cause performance issues, including power loss. Always ensure that you’re using fresh, clean fuel and keep the tank free from water or dirt.
  
• Air Intake Blockages: Dust and debris can accumulate in the air intake system, blocking airflow and reducing the engine’s efficiency. This issue is particularly common in environments with high amounts of dust or during heavy-duty operation.
  
• Worn or Damaged Components: Worn-out components like the fuel pump, injectors, or engine valves can lead to poor engine performance and power loss. These parts may need to be replaced if they are found to be damaged.
  
• Battery and Electrical Issues: A weak or failing battery can prevent the engine from receiving the power it needs to operate at full capacity. Additionally, a malfunctioning alternator can cause power issues that lead to stalling or erratic behavior.
  

4. Solutions to Fix Power Loss in the Bobcat 700
Once you have identified the cause of power loss in your Bobcat 700, the next step is to fix it. Here are some solutions based on common problems:

• Replace Clogged Fuel and Air Filters: If either the fuel or air filter is clogged, replace it with a new one. Keeping these filters clean is essential for maintaining optimal engine performance.
  
• Check and Replace the Fuel Pump: If the fuel pump is malfunctioning, replace it with a new one. This will ensure that the engine receives the correct amount of fuel at the right pressure.
  
• Inspect and Clean the Air Intake System: Ensure that the air intake system is clear of any obstructions. If the air filter is dirty, clean or replace it as needed. Check the air intake hoses for damage, and make sure that all components are functioning properly.
  
• Replace the Battery if Necessary: If the battery is weak or failing, replace it with a new one. A fully charged battery is essential for consistent engine performance and reliable starting.
  
• Repair or Replace Worn Engine Components: If engine compression is low or if there are signs of damaged internal components, these will need to be repaired or replaced. This may include replacing piston rings, valves, or a blown head gasket.
  

5. Preventative Maintenance for the Bobcat 700
To avoid future power loss issues, regular preventative maintenance is essential. Here are some tips to keep your Bobcat 700 running at its best:

• Regularly Change the Fuel and Air Filters: Make it a habit to inspect and replace the fuel and air filters on schedule. This will prevent clogging and ensure optimal airflow and fuel delivery.
  
• Check the Fuel Quality: Always use high-quality, fresh fuel in your machine. Avoid using old or contaminated fuel, as this can lead to poor performance.
  
• Inspect the Battery and Electrical System: Periodically check the battery charge and inspect the alternator and connections for signs of wear or corrosion. A healthy electrical system is key to maintaining power.
  
• Clean the Air Intake System: Regularly inspect and clean the air intake system to ensure that it remains free from dirt and debris, particularly if you're working in dusty environments.
  
• Monitor Engine Performance: Pay attention to how the engine runs. If you notice any unusual sounds, loss of power, or other issues, address them immediately to prevent further damage.
  

6. Conclusion: Keep Your Bobcat 700 Running Strong
Power loss in the Bobcat 700 can be caused by a variety of factors, from clogged filters to worn-out components. By systematically diagnosing the issue and addressing the root cause, you can restore your skid steer to optimal performance. Regular maintenance, such as replacing filters, checking fluid levels, and inspecting the engine and electrical system, will help prevent future power loss and extend the lifespan of your equipment.
Don’t let power loss slow you down—take proactive steps to keep your Bobcat 700 in top working condition!