Case 550H Crawler Dozer Repair Manual

The Case 550H crawler dozer, produced from 1999 through the mid-2000s, is part of Case’s H-Series lineup. Designed as a compact yet powerful crawler, it is widely used in construction, utility, and agricultural applications. With a proven Case diesel engine, responsive hydraulics, and durable undercarriage, the 550H balances performance, maneuverability, and operator comfort.

General
Weighing between 14,317 and 14,960 lb depending on configuration, the Case 550H provides excellent stability for its size class. The dozer’s compact dimensions—approximately 13 ft in length, 7 ft in width, and 8.5 ft in height—make it versatile for both confined sites and open grading work. A four-post ROPS canopy ensures operator safety and visibility.

Engines
The 550H is powered by a Case 3.9 L, 4-cylinder diesel engine rated at 75 gross horsepower (67 net). Both naturally aspirated and turbocharged versions were available, delivering reliable torque and efficient operation across demanding workloads.

Fuel System
A 30.5-gallon fuel tank provides sufficient runtime for extended work periods. The system ensures steady fuel delivery under varied operating conditions, supporting consistent engine performance throughout long shifts.

Electrical
The 12-volt electrical system, equipped with a 65-amp alternator, provides reliable starting power and supports lighting and auxiliary functions. The negative-ground design improves serviceability and durability.

Tracks
Equipped with 16-inch wide tracks, the undercarriage delivers strong traction and flotation. The long-track design provides about 78 inches of ground contact for improved stability and reduced ground pressure, enabling the machine to handle diverse terrain conditions.

Power Train
The 550H features a Case constant-mesh modulated 4-speed torque converter transmission. This setup delivers smooth power transfer, multiple forward and reverse speed options, and flexibility for both fine grading and heavy pushing tasks.

Brakes
Hydraulic wet-disc brakes provide dependable stopping power. The sealed design reduces maintenance needs and ensures consistent braking performance in tough environments.

Hydraulics
The open-center hydraulic system delivers approximately 21.9 GPM at 2,500 psi. With a hydraulic fluid capacity of 10.3 gallons, the system provides responsive and precise control of mounted equipment, supporting efficient grading and dozing operations.

Mounted Equipment
The Case 550H supports multiple blade configurations, including straight and six-way PAT (power-angle-tilt) options. Standard blades provide capacities from 1.65 yd³ on long-track models up to 1.9 yd³ on WT and LGP variants, with widths ranging from 8 to 9 feet. These configurations give operators versatility for backfilling, finish grading, and general earthmoving.

Key Highlights

• Production years: 1999 – 2008 (H-Series)
• Engine: Case 3.9 L 4-cyl diesel, 75 HP gross / 67 HP net
• Operating weight: 14,317 – 14,960 lb
• Transmission: Case constant-mesh 4-speed torque converter
• Fuel capacity: 30.5 gallons; Hydraulic capacity: 10.3 gallons
• Hydraulic system: 21.9 GPM open-center at 2,500 psi
• Tracks: 16-inch width; long-track ground contact ~78 in
• Braking: Hydraulic wet-disc brakes
• Operator station: Four-post ROPS canopy
• Blade options: straight or six-way PAT, 1.65 – 1.9 yd³ capacity