Case 1150M Crawler Dozer Repair Manual

The Case 1150M crawler dozer is part of the M-Series lineup, engineered for productivity, efficiency, and operator comfort. Featuring a Tier 4 Final FPT 6.7 L turbocharged diesel engine, hydrostatic dual-path drive, and advanced operator controls, the 1150M delivers excellent pushing power, fine grading precision, and versatility. With operating weights ranging from 31,000 to nearly 34,000 lb depending on configuration, it is built to handle demanding construction, site preparation, and land-clearing applications.

Introduction
The Case 1150M represents a balance of strength and technology. Equipped with a 127 net horsepower engine and hydrostatic transmission, it combines tractive effort with precise maneuverability. Configurations include XLT, WT, and LGP to optimize traction and flotation across different soil conditions.

Engine – 10
The 1150M is powered by a 6.7 L FPT six-cylinder turbocharged diesel engine delivering 132 gross horsepower (127 net). With peak torque of approximately 460 lb-ft at 1,400 rpm, it provides responsive power while meeting Tier 4 Final emissions standards for improved fuel efficiency and reduced environmental impact.

Hydrostatic Drive – 29
The dual-path hydrostatic drive provides infinite variable speed control and counter-rotation for excellent maneuverability. Travel speeds reach up to 5.8 mph, allowing efficient grading and dozing while ensuring precision in confined workspaces.

Brakes And Controls – 33
Dynamic hydrostatic braking is standard, supported by hydraulic wet-disc service brakes. Electro-hydraulic controls with fingertip operation allow smooth, precise handling and reduced operator fatigue during long shifts.

Hydraulic Systems – 35
The load-sensing hydraulic system uses a variable-displacement piston pump delivering up to 41 GPM at 3,000 psi. With a 23-gallon hydraulic reservoir, it provides consistent blade control and auxiliary power for attachments under demanding workloads.

Tracks And Track Suspension – 48
The undercarriage features seven bottom rollers and two carrier rollers per side with 40–42 shoes, depending on configuration. Track shoe widths range from 22 to 30 inches, with ground pressures varying from ~6.1 psi (XLT) to as low as 4.7 psi (LGP). This ensures excellent stability and traction across varied ground conditions.

Cab Climate Control – 50
The ROPS/FOPS cab offers ergonomic seating, low noise levels, and wide visibility. Optional heating and air conditioning provide operator comfort for all-season productivity.

Electrical Systems – 55
The machine is equipped with a 24-volt electrical system supported by dual 12V batteries and a 100-amp alternator. This ensures reliable starts and powers lights, diagnostics, and auxiliary functions.

Dozer Blade And Arm – 86
The 1150M is fitted with a six-way PAT blade, with a capacity ranging from 3.4 yd³ to 4.5 yd³ depending on variant. Its strong arms and linkages ensure smooth, powerful blade operation for grading, cutting, and spreading material.

Platform, Cab, Bodywork, And Decals – 90
The cab and platform are designed for durability and service accessibility. Case M-Series styling with clear decals and reinforced bodywork underscores reliability and ruggedness.

Electrical Schematic Poster – 47907890
The manual includes a complete electrical schematic poster for detailed diagnostics and service of the 24V system.

Hydraulic Schematic Poster – 47907882
The manual also provides a hydraulic schematic poster for accurate troubleshooting and maintenance of the hydraulic circuits.

Key Highlights

• Engine: FPT 6.7 L turbo diesel, 132 gross HP / 127 net HP, ~460 lb-ft torque
• Operating weight: 31,134 – 33,966 lb (XLT / LGP)
• Transmission: Dual-path hydrostatic drive, variable speeds up to 5.8 mph
• Fuel capacity: 65 gal; Hydraulic capacity: 23 gal
• Hydraulic output: 41 GPM @ 3,000 psi
• Blade: Six-way PAT, 3.4 – 4.5 yd³ capacity
• Tracks: 7 bottom rollers, 2 carrier rollers, 22–30 in shoes
• Ground pressure: ~6.1 psi (XLT) to 4.7 psi (LGP)
• Electrical: 24V system, dual 12V batteries, 100A alternator
• ROPS/FOPS cab with optional HVAC for operator comfort
• Optional attachments: rear rippers or winches for added versatility