Case 1150L Crawler Dozer Repair Manual

The Case 1150L crawler dozer, built between 2001 and 2006, is part of the L-Series lineup designed for heavy earthmoving, grading, and site preparation. With a powerful turbocharged diesel engine, a reliable power-shift transmission, and a heavy-duty undercarriage, the 1150L delivers excellent balance between pushing power and maneuverability. Available in LT, WT, and LGP configurations, this machine adapts to a wide range of soil conditions and applications.

Introduction
The Case 1150L weighs approximately 29,500 lb in LT configuration and up to 31,000 lb in LGP form. It provides operators with a robust, versatile platform capable of handling construction, land clearing, and utility work. A comfortable cab, modern controls, and efficient hydraulic system add to its overall productivity.

Engine – 10
The dozer is powered by a 5.9 L Case/Cummins 6T-590 six-cylinder turbocharged diesel engine. It produces 132 gross horsepower and 128 net horsepower with a peak torque of about 420 lb-ft at 1,400 rpm, ensuring strong pulling and dozing capability with reliable fuel efficiency.

Rear Axle System – 27
The rear axle and final drive system are engineered for durability, built to transmit power efficiently to the tracks while withstanding continuous heavy-duty operations.

Hydrostatic Drive – 29
The 1150L employs a 3-speed PowerShift transmission (3F / 3R) that provides smooth shifting under load. The drivetrain ensures steady travel speeds and optimal control in both heavy pushing and fine grading conditions.

Brakes And Controls – 33
Hydraulic wet-disc brakes provide dependable stopping power with minimal maintenance requirements. Operator-friendly controls ensure precision and reduce fatigue during long working shifts.

Hydraulic Systems – 35
The hydraulic system uses an open-center gear-type pump delivering around 41 GPM at 2,500 psi. With a hydraulic reservoir capacity of 23 gallons, the system supports powerful and responsive blade operation under heavy loads.

Tracks And Track Suspension – 48
The undercarriage includes seven bottom rollers and two carrier rollers per side, with 40–42 shoes depending on configuration. Shoe widths range from 22 inches on LT to 30 inches on LGP models. Ground pressure varies between 6.4 psi (LT) and 4.9 psi (LGP), offering traction on firm ground and flotation in softer soils.

Cab Climate Control – 50
The ROPS/FOPS cab provides a safe and comfortable working environment, with optional heating and air conditioning for year-round operation. Wide visibility and reduced noise levels improve operator efficiency.

Electrical Systems – 55
The 1150L is equipped with a 24-volt electrical system powered by dual 12-volt batteries and a 70-amp alternator. This setup supports reliable starts, lighting, and auxiliary systems in demanding work environments.

Dozer Blade And Arm – 86
The LT variant carries a blade capacity of about 4.3 yd³, while the LGP configuration supports up to 5.0 yd³. The robust blade arms and linkage are designed for strength and precise control, making the machine suitable for grading, spreading, and heavy dozing work.

Tools – 89
Optional rear-mounted tools include winches and rippers, expanding the versatility of the 1150L for land clearing, site prep, and utility construction tasks.

Platform, Cab, Bodywork, And Decals – 90
The cab and platform are ruggedly built for durability, with convenient service access and modern Case L-Series decals highlighting its design and branding.

Key Highlights

• Production years: 2001 – 2006 (L-Series)
• Engine: Case/Cummins 6T-590, 6-cyl turbo diesel, 5.9 L, 132 gross HP / 128 net HP
• Max torque: ~420 lb-ft @ 1,400 rpm
• Operating weight: ~29,500 lb (LT) to ~31,000 lb (LGP)
• Transmission: 3-speed PowerShift (3F / 3R)
• Hydraulics: Open-center, 41 GPM @ 2,500 psi, 23-gal reservoir
• Blade capacity: 4.3 – 5.0 yd³ depending on configuration
• Tracks: 7 bottom rollers, 2 carrier rollers, 22–30 in shoe widths
• Ground pressure: 6.4 psi (LT) to 4.9 psi (LGP)
• Fuel capacity: 65 gal; Hydraulic capacity: 23 gal
• Electrical: 24V system, dual 12V batteries, 70A alternator
• ROPS/FOPS cab with optional HVAC for operator comfort