Case 9020B Excavator – Parts, Specs

Description:

Serial Number Location:

For Case 9020B Excavators (produced from approximately 1997 to 2002), the serial number plate is typically mounted on the right side of the upper structure, just beneath the cab, or along the front of the frame near the boom foot. Confirming the serial number is essential, as B-series updates introduced improved hydraulic flow, refined cab controls, and upgraded swing systems over the original 9020 model.

Key Specifications

Years Manufactured: 1997 – 2002

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

Net Horsepower: 123 HP @ 2,000 rpm

Displacement: 400 cu in (6.5 L)

Drive Type: Hydrostatic with planetary final drives

Hydraulic Flow Rate: 2 × 54 gal/min

Hydraulic Pressure: 4,780 psi

Operating Weight: Approx. 45,000 – 46,500 lbs

Max Digging Depth: 21 ft 3 in

Reach at Ground Level: 31 ft

Bucket Capacity: 0.8 – 1.4 cubic yards

Travel Speed: 3.4 mph

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

Performance & Design Highlights

Refined B-Series Hydraulics: Updated pilot-operated joysticks with proportional control offer improved responsiveness and multitasking during swing, boom, and stick movement.

Durable Isuzu Engine: Reliable, fuel-efficient power with high torque for lifting and trenching under tough jobsite conditions.

Reinforced Carbody and Frame: The B-series features a strengthened boom foot and more durable swing bearing design to increase structural longevity.

Operator-Centered Cab: Improved insulation, larger viewing area, air-suspension seat, and ergonomic lever placement help reduce operator fatigue.

Auxiliary Hydraulics-Ready: Pre-installed lines allow for easy use of thumbs, compactors, and other powered attachments.

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 restricted

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

• Swing Gear Oil: Replace every 1,000 hours

• Track Tension: Adjust weekly with grease cylinder

Common Issues & Fixes

Hydraulic Delays or Weakness: Often caused by clogged return filters or worn valve spools—replace filters and check for internal leakage.

Boom or Arm Drift: Typically due to worn cylinder seals—repack cylinders and inspect control valve stack for bypass.

Travel Motor Lag or Sticking: Can result from low charge pressure or motor wear—inspect hydraulic motor and final drive seals.

Swing Bearing Creaking or Play: Caused by insufficient lubrication—grease bearing daily and check for excessive wear or bolt looseness.

Cab Display or Electrical Faults: Inspect relays, battery grounds, and harness connectors under seat or dash panel—clean and tighten.

Overheating Hydraulic System: Usually due to clogged coolers—remove debris and flush hydraulic oil if temperatures stay high.