Case 750 Crawler Dozer Repair Manual

The Case 750 crawler dozer, produced between 1961 and 1967, is a mid-size industrial crawler designed for reliability, durability, and consistent performance in earthmoving, grading, and utility work. Equipped with a rugged Case diesel engine, torque converter drive, and robust hydraulic system, the 750 combines strength and simplicity, making it a dependable machine for its era.

Section 1: General Description
With an operating weight of approximately 13,900 lb, the Case 750 balances stability with maneuverability. Its open operator station and straightforward layout reflect the rugged, utilitarian design of the early 1960s industrial crawler line.

Section 2: Specifications
The 750 is powered by a J.I. Case 4-cylinder, 4.9 L diesel engine rated at 72 gross horsepower (63 net). This engine provides dependable torque and fuel efficiency for grading and earthmoving operations. A fuel capacity of 36 gallons and hydraulic reservoir of 14 gallons support extended work cycles on the job site.

Section 3: Instruments
Basic instrumentation provides operators with essential engine and system monitoring, ensuring reliable operation without unnecessary complexity.

Section 4: Cooling System
The cooling system maintains optimal engine operating temperature under heavy load conditions, contributing to engine reliability and service life.

Section 5: Electrical System
The Case 750 employs a 12-volt electrical system, supporting engine starting and essential lighting. The system is designed for simplicity and durability in field conditions.

Section 6: Engine Air Intake System
The diesel intake system delivers clean, filtered air to the 4.9 L engine, ensuring efficient combustion and consistent power output.

Section 7: Engine, Track and Equipment Controls
Mechanical controls provide direct operator control of engine throttle, transmission, and hydraulic functions. The simple layout supports reliability and ease of service.

Section 8: Torsion Bar and Suspension System
The undercarriage is supported by a torsion bar suspension system and 14-inch wide tracks, distributing machine weight evenly and providing traction in varying soil conditions.

Section 9: Track System
The 14-inch crawler tracks provide stability and flotation, essential for effective dozing and grading on a variety of terrains.

Section 10: Torque Converter
A 4-speed torque converter transmission ensures smooth power transfer and flexibility in ground speeds, allowing the 750 to adapt to different working conditions.

Section 11: Transmission
The transmission offers four forward and reverse speeds, ensuring versatility across pushing, grading, and traveling tasks.

Section 12: Miscellaneous Tractor Components
Heavy-duty final drives, steering clutches, and brake systems contribute to long service life and efficient operation under load.

Section 13: Hydraulic System
An open-center hydraulic system delivers approximately 25 GPM at 1,250 psi, ensuring smooth control of mounted equipment and blades. The system’s 14-gallon capacity supports continuous operation.

Section 14: Allied Equipment
The Case 750 supports a variety of allied attachments, including straight blades and rear-mounted rippers, extending its versatility across applications.

Section 15: General Service Information
Routine service points are accessible, supporting maintenance in the field. Case provided detailed service guidelines to ensure the 750 remained dependable throughout its working life.

Key Highlights

• Production years: 1961 – 1967
• Engine: J.I. Case 4-cyl diesel, 4.9 L, 72 gross HP / 63 net HP
• Operating weight: ~13,900 lb
• Fuel capacity: 36 gallons; Hydraulic capacity: 14 gallons
• 4-speed torque converter drive transmission
• Open-center hydraulics: ~25 GPM @ 1,250 psi
• Tracks: 14-inch crawler tracks with torsion bar suspension
• Open operator station with simple, durable controls
• Compatible with straight blades and rear rippers