Case 821B Wheel Loader – Parts, Specs

Serial Number Location:

For Case 821B models (manufactured from 1994 to 1999), the serial number plate is located on the left side of the machine, just behind the front axle near the articulation joint or on the frame beneath the cab entry steps. Always verify the serial number before ordering parts, as this model introduced key upgrades from the original 821.

Key Specifications

Years Manufactured: 1994 – 1999

Engine Model: Cummins 6CT8.3 turbocharged 6-cylinder diesel

Net Horsepower: 185 HP @ 2,200 rpm

Displacement: 504 cu in (8.3 L)

Transmission Type: 4-speed powershift with torque converter

Hydraulic Flow Rate: 42 gal/min

Hydraulic Pressure: 2,900 – 3,000 psi

Operating Weight: Approx. 33,000 – 34,000 lbs

Bucket Capacity: 3.25 – 4.0 cubic yards

Breakout Force: 32,000 – 35,000 lbs

Top Travel Speed: 23.5 mph

Dimensions (L×W×H): Approx. 28.5 ft × 9.1 ft × 11.2 ft

Performance & Design Highlights

Cummins 6CT Engine Power: Known for its reliability and torque output, the 821B's 8.3L engine provided dependable performance for quarry, construction, and material handling tasks.

Smooth Powershift Transmission: Four-speed torque converter transmission delivered steady acceleration and strong push capability under heavy load.

Heavy Loader Frame: Reinforced loader arms and Z-bar linkage offered powerful breakout force and excellent rollback strength.

Hydraulic Improvements: Larger pump capacity and faster cycle times enhanced operator efficiency during repetitive load-and-carry operations.

Cab Comfort Upgrades: Enclosed cab with improved seat suspension, better airflow, and noise insulation marked a step forward in operator experience.

Routine Maintenance

• Engine Oil & Filter: Change every 250 hours

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

• Transmission Oil & Filter: Change every 1,000 hours

• Fuel Filters: Replace every 250–300 hours

• Air Filters: Inspect every 100 hours; replace when needed

• Brake System: Check fluid and function every 500 hours

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

Common Issues & Fixes

Hydraulic Leaks at Lift Cylinders: Common with age—reseal cylinders and inspect rod ends for pitting or chrome damage.

Transmission Slippage in 3rd/4th Gear: Caused by worn clutch packs—inspect transmission pressure and rebuild if slippage persists.

Engine Hard Starts or Smoking: Likely from worn injectors or air intrusion—test injector spray and replace fuel lines or return seals.

Brake Warning Light or Weak Brakes: Wet disc brakes may be contaminated—drain system and inspect for seal failure at axle ends.

Loader Arm Sway: Caused by worn pins and bushings—install new bushing kits and verify grease path integrity.

Cab Ventilation Weak or Inoperative: Check for clogged HVAC filter or failed blower motor—clean or replace components as needed.