Case 1840 Skid Steer Loader Tire Upgrade

[MikePhua]

Overview
The Case 1840, produced from 1988 to 2001, is a durable skid steer loader equipped with a Case 4-390 diesel engine delivering approximately 51 hp, a rated operating capacity of 635 kg, and weighing around 2.4 tons . Its standard tire size is 10-16.5, mounted on 6-lug wheels .
Tire Upgrade Options
Owners considering tire upgrades have explored increasing traction, ground clearance, and minimizing turf damage. Available upgrade paths include:

• Upsizing to 12-16.5 tires, which boost ground clearance by about 1" and tread width by 2" .
  
• Optional for Case 1840:
  • New pneumatic tires rated 10-16.5 (standard) or 12-16.5 from brands like MWE or Camso .
    
  • Over-Tire Tracks (OTTs) offering tracks over existing 10-16.5 tires, requiring no spacers .
    
  • Solid-rubber tires (EWRS-AT for all terrain, EWRS-HS for hard surfaces) available in sizes up to 14-17.5, offering higher load ratings and puncture resistance .
    

Real-World Performance
An operator reported that upsizing improved performance in rocky, muddy ranch terrain but altered machine balance:

• The loader’s tipping load changed noticeably, causing a loss of a 1,500 lb load held at 3' off the ground .
  Another user cautioned that even a 2" wider tire won’t prevent grass scarring when turning abruptly .
  

Tire & Wheel Specs

• Standard rim fits 10-16.5 tire; wheel width is approximately 9 3/8 in; bolt pattern is 6-lug on 6" .
  
• Aftermarket wheels and tires are widely available on auction platforms and supplier sites .
  

Summary Table: Tire Options

• Stock: 10-16.5 pneumatic tires—balanced performance, standard ground clearance, smooth ride
  
• Upsize: 12-16.5 pneumatic tires—+1" ground clearance, wider tread, better in rough/muddy terrain, alters tipping load
  
• Solid Tires: EWRS-AT/HS—durable compound, high load rating, puncture-proof, stiff ride
  
• OTTs: Over-Tire Tracks—enhanced traction and flotation without wheel modification
  

Recommendations

• Assess jobsite terrain and needs: Muddy, uneven ground may benefit from upsized or solid tires for traction; turf-sensitive areas may not benefit from wider tires if turning remains abrupt.
  
• Consider safety: After upsizing, recalibrate load handling since tipping dynamics can change significantly.
  
• Verify wheel specs before purchase to ensure compatibility and avoid fitment issues.
  
• Balance cost vs. longevity: Solid tires and OTTs cost more upfront but reduce downtime from flats and extend tire life.
  

Closing
Upgrading tires on the Case 1840 loader can greatly enhance its capability and fit specific job demands. Whether opting for wider pneumatic tires, robust solid lug designs, or traction-boosting OTT systems, it’s vital to weigh performance gains against stability, safety, and cost. Proper selection will maximize productivity and adapt the machine to challenging environments effectively.