Choosing the Right Door for a John Deere CT322 Skid Steer

[MikePhua]

The CT322 and Its Role in Compact Construction
The John Deere CT322 compact track loader was introduced in the early 2000s as part of Deere’s expansion into rubber-tracked machines designed for low ground pressure and high maneuverability. With a 66-horsepower diesel engine and an operating weight of approximately 8,000 pounds, the CT322 was engineered for grading, land clearing, and material handling in soft or uneven terrain. Deere, founded in 1837, had already established dominance in agricultural machinery, and the CT series helped solidify its presence in compact construction.
The CT322 featured joystick pilot controls, a vertical lift path, and a sealed cab option. However, many units were sold without doors, especially in warmer climates or for budget-conscious buyers. As operators began using these machines in brush-heavy environments, the absence of a front door became a safety concern.
Why a Door Matters in Brush Work
Operating a skid steer without a front door exposes the operator to flying debris, branches, and dust. In forestry mulching or bush hogging applications, the risk of injury from projectiles is significant. A well-known incident involved a brush-clearing operator who was fatally struck by a tree limb while working without a protective enclosure. This tragedy underscored the importance of cab protection, especially when visibility and reaction time are compromised.
A door serves multiple purposes:

• Shields the operator from debris and weather
  
• Reduces noise and vibration
  
• Improves HVAC efficiency in enclosed cabs
  
• Enhances resale value and professional appearance
  

Door Options and Material Considerations
There are several types of doors available for the CT322, each with trade-offs in cost, durability, and visibility.

• Tempered Glass Doors
  Offer excellent visibility and scratch resistance. However, they are prone to shattering if struck by large debris. Ideal for grading and snow removal but risky in forestry work.
  
• Lexan (Polycarbonate) Doors
  Highly impact-resistant and flexible. Lexan can absorb hits from branches and rocks without cracking. Over time, it may develop spiderweb microfractures that reduce clarity, especially in direct sunlight.
  
• Plexiglass Doors
  A more affordable alternative to Lexan, but less durable. Plexiglass is more prone to cracking and yellowing. Suitable for light-duty use but not recommended for high-impact environments.
  
• Mesh or Screen Barriers
  Some operators fabricate wire mesh panels secured with bungee cords or brackets. While inexpensive, these offer limited protection and poor visibility. They are best used as temporary solutions or in low-risk areas.
  

Cost and Sourcing Challenges
OEM doors for the CT322 can cost upwards of $2,300, especially if sourced through a dealer. This price typically includes the frame, latch mechanism, hinges, and glass or polycarbonate panel. Aftermarket suppliers may offer demolition-grade doors for less, but compatibility and warranty support vary.
Alternative sourcing strategies include:

• Salvage yards with dismantled CT322 units
  
• Online marketplaces specializing in used construction parts
  
• Fabrication shops that build custom enclosures
  
• Cross-referencing part numbers with similar Deere models
  

Operators should verify door dimensions, hinge spacing, and latch compatibility before purchasing. Some aftermarket doors require drilling or bracket modification to fit older machines.
VIN Lookup and Model Verification
To ensure correct part matching, the machine’s VIN (Vehicle Identification Number) is essential. Deere uses a 13-digit format for compact equipment. While online VIN decoders for Deere are limited, dealers can perform lookups using proprietary systems. Providing the VIN allows them to confirm build date, factory options, and compatible parts.
For example:

• A CT322 built in 2004 may have different hinge spacing than a 2006 model
  
• Cab configurations (open vs. sealed) affect door frame design
  
• Serial number prefixes help identify production batches and regional variants
  

Installation Tips and Safety Enhancements
Installing a door on a CT322 requires basic mechanical skills and attention to alignment. Key steps include:

• Cleaning the mounting surface and inspecting hinge points
  
• Using anti-seize compound on bolts to prevent corrosion
  
• Adjusting latch tension to ensure a secure seal
  
• Adding weatherstripping for dust and water resistance
  
• Testing door swing clearance and lock engagement
  

For added safety, consider installing:

• Protective film on glass to reduce shatter risk
  
• Secondary latch or lock to prevent accidental opening
  
• Cab pressurization kit to reduce airborne contaminants
  

A Field Story from Pennsylvania
A coal miner turned land clearer in South Pittsburgh retrofitted his 2004 CT322 with a Lexan door after repeated encounters with tree limbs during bush hogging. Initially hesitant due to cost, he fabricated a temporary mesh screen before investing in a demolition-grade door. The upgrade not only improved safety but allowed him to work longer hours in comfort, especially during summer heat. He later added a roof-mounted fan and cab insulation, turning the machine into a year-round workhorse.
Conclusion
Outfitting a John Deere CT322 with a proper door is more than a comfort upgrade—it’s a critical safety measure. Whether choosing tempered glass, Lexan, or a custom solution, the right door enhances protection, visibility, and operational confidence. With careful sourcing, VIN verification, and thoughtful installation, operators can transform their open-cab CT322 into a secure, efficient machine ready for demanding environments.