Case 1150C Crawler Dozer Repair Manual

The Case 1150C crawler dozer, manufactured from 1978 to 1983, was designed as a powerful and dependable machine for medium-to-large earthmoving operations. With its strong six-cylinder diesel engine, rugged undercarriage, and full power-shift transmission, the 1150C delivers excellent pushing power, stability, and operator-focused reliability. It was a cornerstone model in Case’s 1150 series, known for performance and ease of service.

General
Weighing approximately 24,970 lb, the Case 1150C provides excellent balance and durability in demanding work environments. Its design features a reinforced crawler frame, a robust track system, and an operator station built for safety and long working hours. The dozer is typically fitted with a four-post ROPS canopy, with optional enclosed cab configurations available.

Engine
The Case 1150C is powered by the Case A451BD six-cylinder, liquid-cooled diesel engine. With 451 cu in (7.4 L) displacement, the engine produces 125 gross horsepower and 105 net horsepower. Designed for high torque output, the engine ensures consistent performance under heavy load conditions common in dozing and grading applications.

Fuel System
A diesel fuel system paired with a 52-gallon tank allows extended operation on job sites. Efficient combustion and reliable delivery support consistent power for long work shifts without interruption.

Electrical System
The 1150C employs a 12-volt electrical system with an alternator-equipped charging circuit. This system supports reliable starting, lighting, and auxiliary electrical functions while maintaining service simplicity.

Tracks System
The heavy-duty undercarriage is equipped with 17-inch wide track shoes and approximately 86.7 inches of ground contact. This track system provides solid stability, effective traction, and flotation across a range of soil and terrain conditions, extending component life while reducing ground pressure.

Power Train
A 4-speed full power-shift transmission provides seamless shifting under load, allowing operators to maintain momentum while pushing or grading. This transmission design ensures smooth power delivery, efficient operation, and operator ease-of-use.

Brakes
The braking system is engineered for durability and reliable stopping power in demanding conditions. Hydraulic wet-disc brakes minimize maintenance while ensuring consistent performance.

Hydraulic System
The open-center hydraulic system delivers approximately 52 GPM at 2,200 psi. With a 15-gallon hydraulic reservoir, it provides smooth and responsive control for the mounted blade and other attachments, making it effective for both heavy dozing and precision grading.

Mounted Equipment
The 1150C is typically fitted with a large front-mounted dozer blade, with a heaped capacity of about 2.5 cubic yards. Straight or six-way PAT (power-angle-tilt) blades were available, giving operators flexibility for varied site tasks. Optional rear-mounted equipment such as rippers or winches extend the dozer’s versatility in site preparation and utility work.

Key Highlights

• Production years: 1978 – 1983
• Engine: Case A451BD, 6-cyl, 451 cu in (7.4 L) diesel, 125 gross HP / 105 net HP
• Fuel capacity: 52 gallons; Hydraulic capacity: 15 gallons
• Hydraulic system: Open-center, 52 GPM @ 2,200 psi
• Transmission: 4-speed full power-shift
• Operating weight: ~24,970 lb
• Track system: 17-in shoes, ~86.7 in ground contact
• Blade capacity: ~2.5 yd³ heaped, straight or six-way PAT options
• Electrical: 12-volt system with alternator
• ROPS canopy standard, optional enclosed cab