Case 1150H Crawler Dozer Repair Manual

The Case 1150H crawler dozer, produced from 1999 to 2006, was engineered for reliability, productivity, and operator-focused performance in earthmoving and grading applications. With a strong six-cylinder diesel engine, full power-shift transmission, and robust hydraulic system, the 1150H combines fuel efficiency, responsive control, and rugged construction for long-term durability in construction, utility, and site-preparation work.

General
The Case 1150H offers operating weights ranging from 25,300 lb on the Long Track version to over 27,000 lb on LGP models. Built on a heavy-duty crawler frame, the machine provides exceptional stability, traction, and flotation. Operator protection is provided by a standard ROPS canopy, with optional enclosed cab for enhanced comfort.

Engines
Powered by the Case 6T-590 six-cylinder diesel engine, displacing 359 cu in, the 1150H produces 124 gross horsepower (119 net). Delivering up to 372 lb-ft of torque at 1,600 rpm, the engine ensures reliable pushing power and fuel-efficient operation across demanding applications.

Fuel System
The 56-gallon fuel tank allows extended work periods with minimal refueling, ensuring consistent productivity on long shifts. The system is designed to provide steady, efficient fuel delivery for continuous heavy workloads.

Electrical
The 1150H operates on a 12-volt electrical system with a 65-amp alternator. This setup ensures reliable engine starts, supports lighting, and provides auxiliary electrical power for on-site needs.

Tracks
The undercarriage is designed for versatility across LT, WT, and LGP variants. Track-on-ground length is approximately 97 inches, with shoe widths ranging from 20 inches on LT models to 30 inches on LGP versions. Ground pressures vary from 6 psi on LT/WT versions to as low as 4.1 psi on LGP configurations, giving the machine excellent flotation in soft soil conditions.

Power Train
The 1150H is equipped with a 4-speed constant-mesh power-shift transmission offering four forward and four reverse speeds. Capable of up to 6 mph forward and 7 mph reverse, the system delivers smooth gear changes under load and precise control for both fine grading and heavy pushing tasks.

Brakes
The braking system includes hydraulic wet-disc brakes, designed for consistent performance and long service life under heavy-duty conditions. An automatic parking brake provides additional safety during machine idle or transport.

Hydraulics
The open-center hydraulic system delivers approximately 35 gallons per minute at 2,000 psi. With a hydraulic reservoir capacity of 17 gallons, the system ensures smooth, responsive blade operation and sustained hydraulic performance under load.

Mounted Equipment
The 1150H can be equipped with a variety of blades depending on configuration. Standard blade capacity is approximately 3.4 cubic yards on Long Track versions, with WT and LGP blades increasing capacity to 3.9 cubic yards. Rear-mounted equipment such as winches or multi-shank rippers further expand the dozer’s capabilities.

Electrical And Hydraulic Schematics
Detailed electrical and hydraulic schematics are provided in the service documentation, supporting troubleshooting, repair, and maintenance of the 1150H’s systems to factory standards.

Key Highlights

• Production years: 1999 – 2006
• Engine: Case 6T-590, 6-cyl diesel, 124 gross HP / 119 net HP
• Max torque: 372 lb-ft @ 1,600 rpm
• Operating weight: 25,300 – 27,060 lb depending on configuration
• Fuel capacity: 56 gallons; Hydraulic capacity: 17 gallons
• Hydraulics: 35 GPM @ 2,000 psi
• Transmission: 4-speed power-shift, 4F / 4R, max speed ~6–7 mph
• Track length on ground: 97 in; shoe widths 20–30 in; ground pressure 4.1–6 psi
• Blade capacities: 3.4–3.9 yd³ depending on variant
• 12-volt electrical system with 65-amp alternator
• ROPS canopy standard; optional enclosed cab with HVAC