Case 9020 Excavator – Parts, Specs

Serial Number Location:

For Case 9020 Excavators (produced primarily in the early to mid-1990s), the serial number plate is typically located on the right-hand side of the upper frame beneath the cab or near the boom pivot area. Always verify the serial number before ordering parts—early models differ from later B-series upgrades in both hydraulics and electronics.

Key Specifications

Years Manufactured: Early to mid-1990s

Engine Model: Isuzu BB-6BG1T, turbocharged 6-cylinder diesel

Net Horsepower: 123 HP @ 2,200 rpm

Displacement: 400 cu in (6.5 L)

Drive Type: Hydrostatic dual travel motors with planetary final drives

Hydraulic Flow Rate: 2 × 54 gal/min

Hydraulic Pressure: 4,780 psi

Operating Weight: Approx. 45,000 lbs

Maximum Digging Depth: 21 ft 3 in

Reach at Ground Level: 30 ft 11 in

Bucket Capacity: 0.8 – 1.4 cubic yards

Travel Speed: 3.2 – 3.5 mph

Dimensions (L×W×H): Approx. 31.5 ft × 10.6 ft × 10.9 ft

Performance & Design Highlights

Reliable Isuzu Power: The turbocharged BB-6BG1T engine provides strong torque, consistent fuel economy, and dependable cold-starting ability.

Balanced Hydraulics: Dual variable-displacement piston pumps allow smooth, simultaneous operation of boom, stick, and swing functions.

Rugged Frame & Undercarriage: Heavy-duty frame design with sealed track rollers and reinforced idlers ensures long component life in demanding conditions.

Operator Comfort: Cab features pilot joystick controls, large visibility panels, and mechanical suspension seat for reduced fatigue.

Attachment Ready: Factory auxiliary hydraulic ports allow use with thumbs, compactors, and other specialty tools.

Routine Maintenance

• Engine Oil & Filter: Change every 250 hours

• Fuel Filters: Replace every 250 hours

• Hydraulic Oil & Filters: Change every 1,000 hours

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

• Final Drive Oil: Check every 100 hours; change every 1,000 hours

• Swing Gear Oil: Change every 1,000 hours

• Track Tension: Inspect weekly; adjust via grease cylinder fitting

Common Issues & Fixes

Hydraulic Pump Lag or Cavitation: Caused by clogged return filters or air intrusion—replace filters and bleed the system.

Boom or Stick Drift: Worn piston seals in cylinders—repack cylinder with seal kit and inspect spool valve for bypass.

Travel Motor Creep: Due to worn final drive seals or bypassing motor—rebuild motor or inspect travel pressure balance.

Swing Bearing Wear or Looseness: Torque bearing bolts to spec and grease daily—replace if excessive play or grinding occurs.

Fuel Starvation or Hard Start: Check for air leaks in suction lines or worn primer pump—replace filters and tighten fuel lines.

Electrical System Faults: Inspect cab grounds and battery terminals—corrosion and loose wiring are common on older units.