Case 550E Crawler Dozer Repair Manual

The Case 550E crawler dozer, produced between 1992 and 1994, was part of Case’s well-regarded E-Series lineup. Compact yet powerful, the 550E was designed to provide dependable performance in grading, earthmoving, and utility work. Its efficient diesel engine, rugged undercarriage, and responsive hydraulics made it a reliable machine for both construction and agricultural applications.

General
With an operating weight of 13,425 to 13,525 lb, the Case 550E strikes a balance between stability and maneuverability. Its four-post ROPS canopy ensures operator safety, while the compact size allows the dozer to operate efficiently in confined job sites.

Engine
The 550E is powered by a Case 3.9 L, 4-cylinder diesel engine producing 75 gross horsepower (67 net). Both naturally aspirated and turbocharged (4T-390) versions were available, providing dependable torque and efficient fuel performance under heavy loads.

Fuel System
A fuel tank capacity of 30.5 gallons supports long work periods between refueling. The fuel system is engineered for consistent delivery under varying operating conditions, ensuring reliable performance in demanding tasks.

Electrical
The 550E uses a 12-volt negative-ground electrical system with a 65-amp alternator, providing reliable engine starting and sufficient power for lighting and auxiliary equipment.

Track
The undercarriage is equipped with 16-inch wide tracks for optimal traction and flotation. The durable crawler design supports stability in grading and dozing tasks while reducing ground pressure.

Power Train
The machine features a torque converter drive with a 4-speed transmission, offering four forward and four reverse gears. This design provides smooth power transfer and versatile ground speed control across a variety of conditions.

Brakes
Hydraulic wet-disc brakes provide strong and reliable stopping power. This sealed braking system is designed for low maintenance and long service life, even under demanding applications.

Hydraulics
An open-center hydraulic system delivers up to 18 GPM at 2,500 psi (2,200 psi on LGP versions). With a hydraulic fluid capacity of 10.3 gallons, the system ensures smooth, responsive control of the blade and mounted equipment.

Mounted Equipment
The Case 550E commonly came equipped with a straight or six-way PAT (power-angle-tilt) blade, making it highly versatile for cutting, grading, and backfilling operations. The robust hydraulic system enhances blade responsiveness for precision work.

Key Highlights

• Production years: 1992 – 1994 (E-Series)
• Engine: Case 3.9 L 4-cyl diesel, 75 HP gross / 67 HP net
• Operating weight: 13,425 – 13,525 lb
• Transmission: 4-speed torque converter drive
• Fuel capacity: 30.5 gallons; Hydraulic capacity: 10.3 gallons
• Hydraulic system: Open-center, 18 GPM at 2,500 psi
• Tracks: 16-inch width for stability and flotation
• Braking: Hydraulic wet-disc brakes
• Operator station: Four-post ROPS canopy
• Mounted blades: straight or six-way PAT blade options