Bobcat S185 Problems

The Bobcat S185 skid-steer loader is a workhorse, a ubiquitous sight on construction sites, farms, and landscaping projects. Its compact size and impressive li

Article Author

The Bobcat S185 skid-steer loader is a workhorse, a ubiquitous sight on construction sites, farms, and landscaping projects. Its compact size and impressive lifting capacity make it incredibly versatile. However, like any piece of machinery, the S185 isn't immune to problems. Understanding these common issues, their potential causes, and how to address them can save you time, money, and frustration, keeping your machine running smoothly and your projects on schedule.

So, What's Giving Your S185 a Headache? Common Issues and Their Culprits

Let's dive into some of the most frequently encountered problems with the Bobcat S185, exploring the possible reasons behind them and offering potential solutions.

1. Hydraulic System Hiccups: When Fluid Power Falters

The hydraulic system is the lifeblood of the S185, powering everything from the lift arms to the auxiliary attachments. When it malfunctions, your machine's performance suffers dramatically.

  • Weak or Jerky Lift Arms: This is a common complaint. The problem could stem from several sources:

    • Low Hydraulic Fluid: The simplest, and often overlooked, cause. Check the fluid level in the reservoir and top it off if necessary. Use the correct type of hydraulic fluid as specified in your Bobcat's manual.
    • Clogged Hydraulic Filter: A dirty filter restricts fluid flow, leading to reduced power and jerky movements. Replace the hydraulic filter regularly according to the maintenance schedule.
    • Worn Hydraulic Pump: The pump is the heart of the system. Over time, it can wear down, losing its ability to generate sufficient pressure. A whining noise coming from the pump is often a telltale sign. Hydraulic pump replacement or rebuilding may be required.
    • Internal Leaks: Leaks within the hydraulic cylinders or control valves can bleed off pressure, reducing lift capacity and causing jerky movements. Inspect all hydraulic components for leaks and repair or replace them as needed. Pay particular attention to cylinder seals.
    • Sticking Control Valves: The control valves direct hydraulic fluid to the appropriate cylinders. If a valve is sticking, it can cause erratic movements. Try cleaning the valve or, if that doesn't work, replace it.

  • Overheating Hydraulic Fluid: Excessive heat degrades the fluid, reducing its lubricating properties and potentially damaging hydraulic components.

    • Insufficient Cooling: Check the hydraulic oil cooler for debris and ensure that the fan is operating correctly.
    • Overworking the Machine: Pushing the S185 beyond its capacity can generate excessive heat.
    • Incorrect Hydraulic Fluid: Using the wrong type of fluid can lead to overheating.
    • Internal Pump Issues: Worn internal components can create excess friction, leading to increased heat.

2. Engine Issues: When the Power Plant Stumbles

The engine is the prime mover of the S185. Problems here can bring your entire operation to a standstill.

  • Engine Won't Start: This is a frustrating problem with a wide range of potential causes:

    • Dead Battery: The most common culprit. Check the battery voltage and charge it if necessary.
    • Faulty Starter: If the engine clicks but doesn't turn over, the starter motor may be faulty.
    • Fuel System Problems: Check for a clogged fuel filter, a faulty fuel pump, or air in the fuel lines.
    • Glow Plug Issues (Diesel Engines): In cold weather, faulty glow plugs can prevent the engine from starting.
    • Ignition System Problems (Gasoline Engines): Check the spark plugs, ignition coil, and distributor (if equipped).

  • Engine Runs Rough or Stalls: This could indicate a problem with the fuel system, ignition system (if gasoline), or engine components.

    • Clogged Air Filter: A dirty air filter restricts airflow, leading to poor combustion.
    • Faulty Fuel Injectors: Dirty or malfunctioning fuel injectors can disrupt the fuel delivery.
    • Vacuum Leaks: Vacuum leaks can disrupt the air-fuel mixture, causing the engine to run rough.
    • Low Compression: Worn piston rings or valves can lead to low compression, resulting in poor performance.

  • Overheating Engine: This is a serious problem that can cause significant engine damage.

    • Low Coolant Level: Check the coolant level in the radiator and expansion tank.
    • Faulty Thermostat: A stuck thermostat can prevent coolant from circulating properly.
    • Clogged Radiator: Debris can block the radiator fins, reducing its cooling capacity.
    • Faulty Water Pump: The water pump circulates coolant through the engine. If it fails, the engine will overheat.

3. Electrical Gremlins: When Wires and Connections Go Haywire

Electrical problems can be tricky to diagnose, but they're often the cause of unexpected issues.

  • Lights Not Working: Check the bulbs, fuses, and wiring connections. A blown fuse is often the culprit.
  • Gauges Not Functioning: A faulty sending unit or a wiring problem can cause the gauges to malfunction.
  • Warning Lights Illuminated: Consult the operator's manual to determine the meaning of the warning lights. This could indicate a serious problem that requires immediate attention.
  • Intermittent Electrical Problems: These can be the most challenging to diagnose. Look for loose connections, corroded terminals, and damaged wiring. A multimeter can be a valuable tool for troubleshooting electrical problems.

4. Drive System Dilemmas: When Mobility is Compromised

The drive system allows the S185 to move and maneuver. Problems here affect its ability to perform its tasks.

  • One Side Not Moving: This could indicate a problem with the drive motor, chain, or hydrostatic transmission on that side.

    • Broken Drive Chain: Inspect the drive chains for damage or breakage.
    • Faulty Drive Motor: A failing drive motor will prevent the wheels on that side from turning.
    • Hydrostatic Transmission Issues: Problems with the hydrostatic transmission can also cause a loss of drive on one side.

  • Weak Drive Power: The machine struggles to move or climb hills.

    • Low Hydraulic Fluid: Insufficient hydraulic fluid can reduce drive power.
    • Worn Drive Motors: Worn drive motors can lose their ability to generate torque.
    • Hydrostatic Transmission Issues: Internal problems within the hydrostatic transmission can reduce drive power.

5. Attachment Anxieties: When Your Tools Don't Play Nice

The S185's versatility comes from its ability to use a wide range of attachments. Problems with attachments can often be traced to the hydraulic system or the attachment itself.

  • Attachment Not Working: Check the hydraulic connections, the attachment's hydraulic motor (if equipped), and the auxiliary hydraulic circuit on the S185.
    • Incorrect Hydraulic Flow: Ensure that the hydraulic flow rate is appropriate for the attachment.
    • Faulty Attachment Motor: If the attachment has its own hydraulic motor, it may be faulty.
    • Clogged Hydraulic Lines: Debris in the hydraulic lines can restrict fluid flow to the attachment.

Prevention is Better Than Cure: Maintaining Your S185 for Longevity

Regular maintenance is crucial for preventing problems and extending the life of your Bobcat S185. Here are some key maintenance tasks:

  • Regularly Check Fluid Levels: Engine oil, hydraulic fluid, coolant, and fuel.
  • Replace Filters as Scheduled: Air filter, fuel filter, hydraulic filter, and oil filter.
  • Grease All Fittings: Lubricate all grease fittings regularly to prevent wear and tear.
  • Inspect Hoses and Belts: Check for cracks, leaks, and wear.
  • Keep the Machine Clean: Remove dirt and debris to prevent overheating and corrosion.
  • Follow the Manufacturer's Maintenance Schedule: Consult the operator's manual for the recommended maintenance intervals.

Frequently Asked Questions

  • Why are my lift arms jerky? Likely causes include low hydraulic fluid, a clogged hydraulic filter, or internal leaks in the hydraulic system. Check the fluid level and replace the filter first.
  • What does it mean when my Bobcat is overheating? Overheating can be caused by low coolant, a faulty thermostat, or a clogged radiator. Stop operating the machine immediately and address the issue.
  • Why won't my Bobcat start in cold weather? This could be due to a dead battery, fuel system issues, or faulty glow plugs (if diesel). Try jump-starting the machine or using a fuel additive.
  • How often should I change the hydraulic fluid? Consult your operator's manual, but generally, hydraulic fluid should be changed every 1000 hours or annually, whichever comes first.
  • What type of hydraulic fluid should I use? Refer to your Bobcat S185 operator's manual for the recommended hydraulic fluid specification. Using the wrong fluid can damage the hydraulic system.

Taking Action: Troubleshooting and Repair

When you encounter a problem with your Bobcat S185, start by carefully observing the symptoms. Consult the operator's manual for troubleshooting tips. If you're not comfortable performing the repairs yourself, it's best to take the machine to a qualified mechanic. Remember to always prioritize safety when working on machinery. Disconnect the battery and relieve any pressure in the hydraulic system before starting any repairs.

In conclusion, while the Bobcat S185 is a reliable machine, understanding common issues and preventative maintenance is key. Regularly checking fluid levels and following the maintenance schedule can save you time and money in the long run.