Case 621D Wheel Loader - Specs, Parts & Serial Number Guide

Description:

Serial Number Location

To confirm the year of manufacture and ensure proper part selection for your Case 621D Wheel Loader, locate the serial number in one of the following places:

• Primary Location: Stamped on the frame near the front axle, typically left-hand side

• Alternate Location: On the operator’s cab data plate, often located near the control console or under the seat

Serial numbers begin with JBA and are essential for ordering compatible parts related to engine, hydraulics, drivetrain, and control systems.

Serial Number Reference by Year

Key Specifications

Key Features

• ✅ 152 HP Turbocharged Engine – High torque and fuel-efficient power from the Case 6T-830

• ✅ Upgraded Hydraulics – 48.9 GPM for quick loader cycles and increased productivity

• ✅ Enhanced Cab Comfort – Spacious design with ergonomic controls and wide visibility

• ✅ Heavy-Duty Frame and Loader Linkage – Built for long duty cycles in aggressive material handling

• ✅ 3.3 yd³ Bucket Capacity – Suitable for large loads and quick truck loading

Maintenance & Common Issues

 Routine Maintenance

• Engine Oil, Fuel & Air Filters – Replace every 250 hours

• Hydraulic Fluid & Filter – Change at 500-hour intervals

• Transmission Oil & Filters – Inspect and replace every 1,000 hours

• Cooling System – Inspect and clean monthly or as needed

• Grease Points – Loader arms and bucket pivots should be greased weekly or daily in high-use

⚠️ Common Issues & Solutions

• Hydraulic Lag or Noisy Operation – Replace pump or spool seals – shop hydraulic kits

• Lift Arm Drift – Typically caused by worn cylinder seals or leaking valves

• Engine Performance Drops – Clean turbocharger, replace air filters, or check injectors – see engine parts

• Electrical Glitches in Display or Gauges – Inspect fuse block and replace aging harnesses