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

Description:

Serial Number Location

To accurately determine the production year and ensure part compatibility, locate the serial number of your Case 621E Wheel Loader:

• Frame Location: On the left side near the front axle

• Cab Location: On the data plate inside the operator’s cab, typically behind the seat or near the fuse panel

Serial numbers for this model begin with HHD and are crucial for identifying the correct emissions tier, control system, and drivetrain setup.

Serial Number Reference by Year

Key Specifications

Key Features

• ✅ 162 HP Tier III Engine – Environmentally compliant power with low emissions and high torque

• ✅ High-Capacity Hydraulics – 55.7 GPM flow for faster loader response and lifting

• ✅ Operator-Centric Cab – Enhanced visibility, reduced vibration, and upgraded digital controls

• ✅ Heavy-Duty Structure – Reinforced chassis and arms for long-term jobsite abuse

• ✅ 3.4 yd³ Bucket – Excellent for bulk loading, aggregates, and site prep work

Maintenance & Common Issues

 Routine Maintenance

• Engine Filters & Oil – Every 250 hours

• Hydraulic Filter & Fluid – Replace every 500 hours

• Axle & Transmission Oil – Change every 1,000 hours

• Radiator Cleaning – Monthly in dusty or hot conditions

• Daily Grease Points – Loader arms, cylinder pins, and bucket pivots

⚠️ Common Issues & Solutions

• Hydraulic Delay or Noisy Operation – Check pump and valve block – shop hydraulic kits

• Lift Cylinder Creep – Worn piston seals or spool valve wear

• Emission Code Errors – Check EGR valve, sensors, and exhaust filters – view engine parts

• Cab Electrical Faults – Inspect fuse panel and monitor harness connections