Installing Bobcat rear window glass with a locking seal system is a straightforward 30-minute job that can save you $200 in dealership costs. We’ll cover the complete rear window replacement process for Bobcat skid steers and track loaders equipped with dual-locking seal systems, including the outer locking seal and inner safety cord installation.
Whether you're working on a Bobcat S650, S750, or T870, this step-by-step guide will help you achieve professional results using basic tools available at any big box store.
Understanding Bobcat Locking Seal Window Systems
Bobcat rear window glass installation involves a sophisticated dual-locking system designed for maximum safety and security. The system consists of three main components:
- The outer locking seal that secures into the frame groove.
- The window glass itself.
- The inner safety cord that prevents the window from falling inward.
The locking seal features a specialized groove that fits around the outside perimeter of the window frame, which is part of the protective cage structure. This outer seal has a locking edge that tucks underneath itself to create a secure hold, while the rounded groove on the inner side accommodates the safety cord installation.
This dual-locking design is critical for operator safety. The outer seal provides primary retention, while the inner safety cord acts as a backup system. Never operate equipment without both components properly installed, as the window weight could cause it to fall into the operator compartment.
Materials and Tools Required
Ensure you have the following:
- Rear window glass (tempered glass)
- Locking seal gasket (with integrated locking strip and cord)
- Plastic window installation tools (no metal tools!)
- Suction cup handle (optional, but helps hold the glass)
- Rubber mallet
- Silicone spray or soapy water (for lubrication)
- Clean rags
- A helper (strongly recommended)
Step-by-Step Installation Process
Step 1: Safety Precautions
- Position your Bobcat skid steer or track loader on level ground and engage the parking brake.
- Ensure the engine bay is cool and remove the ignition key.
- Disconnect the battery negative terminal to prevent electrical issues during installation.
- Clean the rear window area thoroughly, removing dirt, debris, and old sealant residue.
Step 2: Install the Locking Seal on the Frame
- Lubricate the seal by spraying silicone or soapy water on the seal and frame opening.
- Install the seal onto the frame. Start in the middle of the window (bottom center recommended) and work your way around, pressing the seal into the frame groove using your plastic tool.
- Use a rubber mallet gently if needed.
- Leave a little extra seal length. Don’t cut it flush. This allows for shrinkage over time and prevents gaps.
Step 3: Install the Rear Window Glass
- Prepare the window and seal.
- Make sure everything is lubricated.
- Have your helper ready inside the cab.
- Insert the glass into the seal. Make sure to start at the bottom center, not the corners. Press the glass into the groove, working your way across the bottom edge.
- Use your plastic tool to open the groove while your helper pushes gently from the inside.
- Continue around the frame. Move up the sides, then across the top.
- The inside helper will help push the seal lip outward so you can slide the glass fully into place.
- Apply steady pressure on the glass and keep pressing the glass toward the cab while installing to ensure a tight fit.
Step 4: Install the Safety Cord
- Find the rounded groove in the seal. This is where the safety cord fits.
- Start in the middle (ideally bottom center). Don’t align the cord’s starting point with the outer seal’s start point. Stagger them for a stronger lock.
- Install the safety cord by pushing the cord into the groove using your plastic tool.
- Apply lubricant as you go.
- Work your way completely around the window.
- Double check the fit.
- Ensure the glass is snug and the seal is fully engaged around the perimeter.
Step 5: Final Checks
- Verify the seal is locked. The outer seal lip should tuck under the inner lip all the way around.
- Confirm the glass is seated evenly and there are no bulges, gaps, or misalignments.
- Clean the glass and frame. Remove any excess lubricant or fingerprints.
Troubleshooting Common Installation Issues
- If the glass appears uneven or sits at an angle in the frame, the seal may not be properly positioned in its groove. Remove the glass and check the seal installation, looking for areas where the seal has twisted or shifted out of position.
- Difficulty engaging the outer locking seal usually indicates insufficient lubrication or improper glass seating. Add more silicone spray and verify the glass is properly positioned before attempting to re-engage the locking mechanism.
- If the safety cord won't stay in its groove, check for adequate lubrication and ensure you're placing the cord in the correct rounded groove rather than another part of the seal system.
- Gaps at the seal connection point typically result from cutting the seal too short. This requires complete seal replacement with proper excess length to prevent future separation.
Frequently Asked Questions
How long does Bobcat rear window glass installation take with the locking seal system?
Complete installation typically takes 30 minutes maximum when following proper procedures. Working with a helper reduces installation time and improves safety during the process.
Can I install a locking seal window by myself?
While possible using suction cup tools, having a helper makes the installation 100% easier and safer. The inside person's assistance is particularly valuable for top edge installation and maintaining glass position during seal locking.
What happens if I don't install the inner safety cord?
The inner safety cord is critical for operator safety - without it, the window weight could cause it to fall into the operator compartment if the outer seal fails. Never operate equipment without both locking systems properly installed.
Are there aftermarket alternatives to genuine Bobcat glass?
Quality aftermarket glass is available for most Bobcat models at 20-50% savings compared to OEM parts. Shop aftermarket replacement glass from Parts Online here.
Where should I start the seal installation on my Bobcat window frame?
Always start seal installation at the bottom center of the window opening, not at corners or top edges. This positioning allows you to work around the frame systematically while maintaining proper seal tension and makes the installation easier.
Why shouldn't I use metal tools?
Metal pry bars and similar tools can chip or crack the glass during installation. Use only plastic window installation tools specifically designed for glass work - they're available at big box tool stores and won't damage your expensive window glass.
How much silicone spray should I use during Bobcat window installation?
Apply silicone spray generously around the entire frame groove and inner seal surfaces. Adequate lubrication is crucial for smooth seal installation and proper glass seating - don't skimp on lubrication to avoid installation difficulties.
How do I know if my locking seal is properly engaged around the window?
A properly locked seal cannot be lifted or moved when you run your hand around the outside perimeter. Any loose sections indicate incomplete locking that requires correction using the plastic installation tools.
Should I cut the locking seal to exact length for my Bobcat window?
Never cut the seal exactly to size - always leave slight excess length. Rubber seals can shrink over time, and having excess prevents gaps from developing at the connection point that could compromise the seal integrity.
What's the most challenging part of DIY Bobcat window installation?
The top edge installation is typically most difficult because the seal groove becomes hard to see from outside. Coordinate carefully with your inside helper who must push the seal outward so you can access the groove with installation tools.
Conclusion
Rear window replacement at the dealer costs ~$200+, but you just saved that by doing it yourself. With patience and the right tools, this job is totally DIY-friendly and can be done in around 30 minutes. Remember that both the outer locking seal and inner safety cord are essential safety components and you should never operate equipment without both systems properly installed.
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.