Replacing side window glass on Bobcat equipment might seem intimidating, but it's a manageable repair that most operators can handle with basic tools and patience. This article goes through the complete process based on real-world experience, including common mistakes to avoid and practical tips that make the job easier.
Follow this guide to replace your side window glass on your Bobcat skid steer or track loader safely and effectively.
Understanding Bobcat Side Window Glass Types
Before beginning any installation, identifying the correct glass type for your specific Bobcat model is crucial. Bobcat manufactures numerous skid steer and track loader models, each with unique window specifications, mounting systems, and glass dimensions.
Most Bobcat side windows use tempered safety glass ranging from 6mm to 8mm thickness, depending on the model year and series. Popular models like the S70, S450, S510, S530, S550, S570, S590, S630, S650, S740, S750, S770, S850, T450, T550, T590, T630, T650, T740, T750, T770, and T870 each have specific glass part numbers and installation requirements.
The glass mounting system typically involves rubber seals, metal retaining clips, and in some cases, adhesive bonding. Newer Bobcat models often feature sliding windows with track systems, while older models may use fixed glass with perimeter sealing. Understanding your specific window type determines the tools, materials, and installation approach required.
Essential Tools, Materials, and Safety Considerations
Having the right tools available before starting prevents delays and reduces the risk of additional damage during the repair process. Based on hands-on experience, here's what you'll actually need:
Required Tools:
- 10mm socket and ratchet for mounting bolts
- 7/16" wrench for handle mechanism
- Vise grips for holding carriage bolt
- Plastic prying tools (never use metal picks near glass)
- Penetrating oil or Teflon spray for lubrication
- Small hand file for smoothing rough edges
- Clean rags for glass cleanup
Materials Needed:
- Replacement tempered glass window
- Metal channel/track
- New rubber gasket for window frame mounting (if existing is damaged)
- Penetrating oil or Teflon spray for lubrication
- Small amount of silicone sealant (if needed for channel attachment)
Quality replacement glass is essential for safety and longevity. Parts Online offers aftermarket parts that meet or exceed OEM quality. Browse replacement Bobcat glass on our site here. Always verify part numbers against your equipment's serial number before purchasing. Contact us here if you have any questions or concerns about compatibility.
Safety Equipment:
- Safety glasses and work gloves
- Proper lighting for detailed work
- Vacuum or brush for glass fragment removal
Critical Safety Warning: Tempered glass shatters completely when struck on the edge, even lightly. Never use metal tools to tap or pry near the glass edges. Even the slightest contact with a metal pick or punch will cause complete glass failure, requiring another replacement window.
Step-by-Step Side Window Removal Process
Step 1: Initial Preparation
- Park your Bobcat on level ground with adequate working space around the damaged window.
- Ensure the engine is off and the area is well-lit.
- If the window is completely shattered, carefully remove loose glass pieces before beginning disassembly.
Step 2: Removing the Window Handle
- Start by removing the spring-loaded window handle from inside the cab.
- Locate the lock nut behind the handle mechanism - this typically requires a 7/16" wrench.
- Use vise grips to hold the square carriage bolt steady while loosening the lock nut.
- The handle assembly consists of the carriage bolt, spring, handle, plastic washers, O-ring, and two lock nuts.
Step 3: Framework Removal
- Remove the six 10mm bolts securing the window framework to the cab. These bolts are positioned around the perimeter of the window opening.
- The rubber gasket simply compression-fits into the opening and will come out with the framework. You don't need to raise the loader arms to access these bolts on most models.
Step 4: Cleaning and Inspection
- Once the framework is removed, thoroughly clean out any remaining glass fragments and debris.
- Inspect the window opening and framework for damage.
- Check the rubber gasket for wear or damage that might require replacement.
Step 5: Frame Inspection and Cleaning
- Once the damaged glass is removed, thoroughly inspect the window frame for damage, corrosion, or wear.
- Clean all mounting surfaces with appropriate solvents to remove old sealant, debris, and corrosion.
- Check rubber seals and gaskets for deterioration.
- Replace any damaged sealing components to ensure proper installation.
Installing the New Window Glass
Step 6: Glass and Channel Preparation
- If your replacement window came with a new channel, you're ahead of the game.
- If reusing the old channel, carefully remove all glass fragments and file down any burrs or rough spots that could damage the new glass. The channel typically has felt on one side - this should face the glass.
Step 7: Critical Installation Technique
- Never install the track first, then try to insert the glass. Instead, place the new glass in the window opening first, then work the channel onto the glass.
- Position the glass in the opening and wedge it up slightly, then slide the channel (felt side down) onto the top edge of the glass.
Step 8: Working the Channel On
- This is the most challenging part of the installation. The channel must be pushed down over the glass edge - it's a very tight compression fit.
- Use only plastic tools to tap the channel into position. Work slowly and patiently, moving the channel gradually down the glass edge. The last eighth of an inch is the tightest and requires the most care.
Step 9: Avoiding Common Mistakes
- Never use metal tools near the glass edges.
- Don't rush the channel installation process.
- If the channel gets stuck, use penetrating oil for lubrication.
- Work the channel back and forth slightly to help it slide over the glass.
Reassembly and Final Adjustments
Step 10: Framework Installation
- Place the completed window assembly back into the cab opening, ensuring the rubber gasket seats properly in the frame. The gasket should compression-fit snugly without gaps.
- Align the bolt holes and install the six 10mm mounting bolts.
- Tighten evenly but don't over-torque - the gasket should compress but not be crushed.
Step 11: Handle Reinstallation
- Reassemble the window handle mechanism in reverse order of removal.
- The carriage bolt goes through the mesh screen on the cab first, then through the window assembly.
- Install the inner plastic washer, O-ring (which fits in a groove), outer plastic washer, and lock nut.
- Use vise grips on the carriage bolt to prevent spinning while tightening the lock nut.
- The spring fits inside the handle, which then threads onto the carriage bolt.
- Adjust the handle position so it operates smoothly and seals properly when closed.
Step 12: Operation Testing and Adjustment
- Test the window sliding action - it may be tight initially. If the window binds or doesn't slide smoothly, the felt inside the channel may be bunched up.
- Work the window back and forth several times to help settle the felt.
- A light application of Teflon spray on the channel can help improve sliding action.
Troubleshooting Common Installation Issues
Real-world installations rarely go perfectly smooth. Here are solutions to common problems encountered during Bobcat window installations:
- Window Won't Slide Smoothly: This usually indicates bunched-up felt in the channel or lack of lubrication. Work the window back and forth repeatedly to help the felt settle into proper position. Apply Teflon spray or similar lubricant to the channel, but avoid petroleum-based products that might damage rubber seals.
- Channel Won't Go On Glass: If the channel gets stuck partway onto the glass, don't force it. Use penetrating oil to lubricate the channel and glass edge. Work the channel back and forth slightly while applying gentle pressure. Remove any burrs or rough spots from the channel that might be catching.
- Glass Breaks During Installation: This typically happens when metal tools contact the glass edge or when forcing the channel. Start over with a new piece of glass and use only plastic tools for any tapping or adjustment. Take your time - rushing leads to broken glass and additional expense.
-
Handle Mechanism Issues: If the handle doesn't operate properly, check that the O-ring is properly seated in its groove and that the lock nuts are properly tightened. The handle should have spring tension but move smoothly.
Frequently Asked Questions
How much does replacement window glass cost?
Replacement side window glass for Bobcat equipment typically costs between $70-150 depending on the model and source. Aftermarket suppliers like Parts Online offer significant savings compared to dealer pricing.
Can I install aftermarket glass instead of OEM Bobcat parts?
High-quality aftermarket glass (like the glass found at Parts Online) is a great alternative to OEM Bobcat glass. Aftermarket glass meets, and often exceeds, the quality of OEM glass for a fraction of the price.
What's the difference between installing glass on skid steers versus track loaders?
The basic installation process is similar between Bobcat skid steers and track loaders, but there are some key differences. Track loaders often have larger cabs with more complex window systems, potentially requiring additional steps for trim removal and access. Some track loader models feature different mounting hardware or enhanced sealing systems due to their typically more demanding operating environments. The tools and materials needed are generally the same, but track loaders may require longer installation times due to cab size and complexity. Always consult your specific model's service manual for detailed procedures.
How do I know if my window frame is damaged and needs repair?
Window frame damage can compromise installation quality and safety. Signs of frame damage include visible cracks or bends in the metal frame, rust or corrosion around mounting points, damaged or missing mounting tabs, and frames that don't hold glass securely or allow excessive movement. Measure frame dimensions and compare to specifications. Frames that are out of square or have altered dimensions may have structural damage. Minor surface rust can often be treated and repaired, but significant structural damage typically requires professional repair or frame replacement to maintain safety standards.
What should I do if the replacement glass doesn't fit properly?
If the replacement glass doesn't fit properly, first verify that you have the correct part number for your specific Bobcat model and serial number. Inspect the window frame for damage or distortion that could affect fit. Ensure that rubber seals are properly positioned and not preventing correct glass placement. Never force glass into position or modify mounting hardware to make incorrect parts fit, as this compromises safety.
Can I repair cracked glass instead of replacing it?
Tempered safety glass cannot be repaired once cracked or chipped. Any attempt to repair or continue using damaged tempered glass is dangerous and violates safety standards. The glass is designed to shatter completely when compromised, so replacement is the only safe option. Small chips or cracks will eventually lead to complete failure, often at the worst possible time.
Conclusion
Replacing side window glass on your Bobcat skid steer or track loader is a straightforward repair that most operators can accomplish with basic tools and patience. The key to success lies in understanding the component relationships, using proper techniques, and avoiding common mistakes that lead to broken glass.
After reading this article you should be more than equipped to install your side window replacement glass on your Bobcat skid steer or track loader without any issues. Take your time, use the right tools, and don't hesitate to start over if something goes wrong during installation. The cost of a replacement window is minimal compared to operator safety and the satisfaction of completing a professional-quality repair yourself.
If you haven’t ordered your parts yet, you can find affordable, high-quality aftermarket replacement glass for your Bobcat skid steer or track loader at Parts Online here. Our glass is designed to meet or exceed OEM quality. If you have questions about installing your Bobcat replacement glass, our experts at Parts Online are ready to assist. Use our contact form on our website, call us at 1-(855) 976-4144 or email sales@partsonline.com for help.