Installing and Maintaining a Block Heater on the Case 1835 Skid Steer

[MikePhua]

The Case 1835 and Its Cold-Weather Challenges
The Case 1835 skid steer loader was introduced in the late 1970s as part of Case’s push into compact construction equipment. With a rated operating capacity of around 1,200 pounds and a four-cylinder diesel engine producing roughly 35 to 40 horsepower, the 1835 was designed for versatility in tight spaces. It became a popular choice for small contractors, farmers, and municipalities across North America.
Despite its mechanical simplicity and reliability, the 1835—like many older diesel machines—can struggle to start in cold weather. Diesel engines rely on high compression and heat to ignite fuel, and when ambient temperatures drop below freezing, cold oil and low cylinder temperatures can make cranking sluggish and combustion inefficient. This is where a block heater becomes essential.
Terminology Notes

• Block Heater: An electric heating element installed in the engine block or coolant passage to warm the engine before starting.
  
• Freeze Plug: A metal disc pressed into the engine block to seal casting holes, often used as a mounting point for block heaters.
  
• Coolant Heater: A variant of block heater that warms the engine coolant, circulating heat throughout the block.
  
• Cold Start Aid: Any device or system that assists diesel engine ignition in low temperatures, including glow plugs, intake heaters, or block heaters.
  

Choosing the Right Heater for the 1835
The Case 1835 typically uses a diesel engine from the Continental or Case family, depending on production year. Most variants are compatible with a 400 to 600-watt block heater designed to fit into a freeze plug port on the side of the engine block.
Key selection criteria:

• Heater type: Freeze plug-style immersion heater
  
• Wattage: 400–600 watts for optimal preheat without overloading circuits
  
• Voltage: 120V AC standard for North American use
  
• Cord length: Minimum 6 feet with weatherproof plug
  
• Seal type: O-ring or thread sealant depending on heater design
  

Some operators opt for external coolant heaters that mount in-line with radiator hoses. These units are easier to install but may not heat the combustion chamber as effectively.
Installation Procedure and Safety Tips
Installing a block heater on the Case 1835 requires basic mechanical skills and attention to detail:

• Step 1: Drain Coolant
  Remove the radiator cap and open the drain valve. Collect coolant in a clean container for reuse if uncontaminated.
  
• Step 2: Locate Freeze Plug
  Identify an accessible freeze plug on the engine block, typically on the right side near the oil filter.
  
• Step 3: Remove Plug
  Use a punch and hammer to drive the plug inward, then extract it with pliers. Clean the port thoroughly.
  
• Step 4: Install Heater
  Apply sealant or install O-ring as per manufacturer instructions. Insert heater and tighten mounting bolt or nut.
  
• Step 5: Route Cord
  Secure the power cord away from moving parts and hot surfaces. Use zip ties and protective loom.
  
• Step 6: Refill Coolant
  Refill system with antifreeze mix and bleed air pockets. Check for leaks around the heater.
  
• Step 7: Test Function
  Plug in heater and verify warmth after 30 minutes. Use a non-contact thermometer or feel the block surface.
  

Operator Anecdotes and Cold Start Success
A farmer in Saskatchewan installed a 600-watt block heater on his 1835 after multiple failed starts during -25°C mornings. After installation, the machine started reliably within 10 seconds of cranking, even after sitting overnight. He later added a timer to activate the heater two hours before use, saving energy and improving readiness.
In another case from Vermont, a contractor used a magnetic oil pan heater in addition to the block heater. This dual setup reduced engine wear and improved hydraulic response during early morning snow removal.
Maintenance and Long-Term Reliability
To ensure the block heater continues performing:

• Inspect cord and plug annually for cracks or corrosion
  
• Test heater resistance with a multimeter (typically 20–30 ohms)
  
• Replace coolant every two years to prevent scale buildup
  
• Avoid running heater dry—always ensure coolant is present
  
• Use a surge protector or timer to prevent electrical overload
  

Alternatives and Supplemental Aids
If installing a block heater is not feasible, consider:

• Glow Plug Upgrade
  Replace aging glow plugs with high-performance units for better cold ignition.
  
• Battery Warmer
  Keep battery capacity high with a wrap-around heater pad.
  
• Synthetic Oil
  Use low-viscosity synthetic diesel oil to reduce cranking resistance.
  
• Intake Heater
  Install an air intake grid heater to warm incoming air before combustion.
  

Conclusion
Adding a block heater to the Case 1835 skid steer transforms winter operation from frustration to confidence. With proper installation and maintenance, the heater ensures smoother starts, reduced engine wear, and better fuel efficiency in cold climates. For operators working in sub-zero conditions, it’s not just a convenience—it’s a necessity. The 1835 may be vintage iron, but with a little warmth, it’s ready to work like new.