Case 721B Wheel Loader – Parts, Specs

Description:

Serial Number Location:

For the Case 721B (produced from 1994 to 1999), the serial number plate is usually located on the left-hand side of the frame near the articulation joint or just behind the front tire. Be sure to verify your serial number before ordering parts, especially since this model sits between the original 721 and the upgraded 721C.

Key Specifications

• Years Manufactured: 1994 – 1999

• Engine Model: Cummins 6BTA5.9C (6-cylinder turbo diesel)

• Net Horsepower: 145 HP @ 2,200 rpm

• Max Torque: 460 lb-ft @ 1,400 rpm

• Displacement: 359 cu in (5.9 L)

• Transmission: 4-speed Powershift (4 forward, 3 reverse)

• Hydraulic Flow Rate: 38 gal/min

• Hydraulic Pressure: 3,000 psi

• Operating Weight: Approx. 28,000 lbs

• Bucket Capacity: 2.5 to 3.25 cubic yards

• Breakout Force: 25,800 lbs

• Top Speed: 23 mph

• Overall Dimensions: Approx. 26 ft long × 8 ft wide × 11 ft high

Performance & Design Highlights

• Proven Cummins Power: The 6BTA engine offers excellent torque for heavy load-out operations and is known for its long-term reliability.

• Balanced Hydraulics: The 721B features a smooth hydraulic system with responsive lift and dump control, suitable for both construction and quarry applications.

• Rugged Frame Design: Reinforced articulation joint and heavy loader arms ensure the 721B can handle repeated high-impact tasks like gravel loading.

• Improved Cab Visibility: Case refined the cab in the B-series with larger windows, better placement of controls, and optional HVAC for operator comfort.

• Powertrain Durability: The powershift transmission is engineered for high duty cycles and quick directional changes with minimal wear.

Routine Maintenance

• Engine Oil & Filter: Replace every 250 hours

• Hydraulic Fluid & Filters: Replace every 1,000 hours

• Transmission Fluid: Replace every 1,000 hours

• Fuel Filters: Replace every 500 hours

• Air Filter: Inspect every 250 hours; replace as needed

• Cooling System: Flush and inspect every 1,000 hours or annually

Common Issues & Fixes

• Hydraulic System Noise or Lag: Often caused by a clogged suction filter or low reservoir level—inspect pump condition and flush system

• Transmission Delays: If shift lag occurs, check the solenoid packs and pressure control valves in the powershift housing

• Loader Arm Slop: Replace worn pins and bushings; monitor wear at the tilt cylinder and main pivot points

• Cooling Fan Belt Failure: Inspect belts regularly for wear or glazing; replace as part of preventative maintenance

• Articulation Joint Looseness: Check center pivot shims and replace worn bearings; daily greasing helps prevent damage