Case 1650L Crawler Dozer Repair Manual

The Case 1650L crawler dozer is a powerful and versatile member of the L-Series, designed for demanding construction, land-clearing, and site-preparation tasks. Featuring a turbocharged diesel engine, hydrostatic drive, and heavy-duty undercarriage, the 1650L delivers high productivity, operator comfort, and reliability across a wide range of applications. Available in XLT and LGP variants, it adapts to both firm terrain and soft ground conditions.

Introduction
With an operating weight ranging from 35,200 lb (XLT) to 37,600 lb (LGP), the Case 1650L is engineered to balance power and flotation. Its robust design, multiple track options, and efficient hydraulics make it suitable for grading, pushing, and heavy earthmoving operations.

Engine – 10
The 1650L is powered by a Case/FPT six-cylinder turbocharged diesel engine with 6.7 L displacement. It produces 156 gross horsepower and 144 net horsepower, with peak torque of 493 lb-ft at 1,400 rpm. This ensures efficient fuel consumption while providing the torque required for heavy-duty dozing.

Rear Axle System – 27
The rear axle system is built for durability and efficient power transfer to the undercarriage. Heavy-duty components ensure strength and long service life under continuous heavy loads.

Hydrostatic Drive – 29
The machine uses a dual-path hydrostatic drive system, providing infinite variable speed control and precise maneuverability. Operators can smoothly change direction and maintain consistent pushing power, making it highly effective in both open and confined spaces.

Brakes And Controls – 33
Dynamic hydrostatic braking is complemented by hydraulic wet-disc service brakes, ensuring safe operation in all conditions. Operator controls are ergonomically designed, providing fingertip precision and reducing fatigue during long shifts.

Hydraulic Systems – 35
The open-center hydraulic system delivers approximately 35 gallons per minute at 2,830 psi. A 26-gallon hydraulic fluid reservoir ensures smooth blade movement and auxiliary equipment operation under continuous workloads.

Tracks And Track Suspension – 48
The undercarriage includes 45 shoes per side with 24-inch wide track shoes, supported by eight rollers and two carrier rollers. Track-on-ground length is about 118 inches, offering excellent traction and ground stability. Ground pressure is approximately 6.2 psi for the XLT and lower for LGP configurations, ensuring better flotation on soft ground.

Cab Climate Control – 50
The cab provides ROPS/FOPS-certified protection and can be fitted with heating and air conditioning. Wide visibility and a comfortable operator environment support productivity in all weather conditions.

Electrical Systems – 55
A 24-volt electrical system with dual 12-volt batteries and a 65-amp alternator ensures reliable starts, strong auxiliary support, and long-term durability in demanding environments.

Dozer Blade And Arm – 86
The 1650L is fitted with a PAT (power-angle-tilt) blade, offering a heaped capacity of around 4.0 cubic yards. The blade’s multi-directional control provides flexibility for dozing, backfilling, and fine grading.

Tools – 89
Optional rear-mounted rippers and winches expand the machine’s capabilities, allowing it to perform effectively in site preparation, land clearing, and utility work.

Platform, Cab, Bodywork, And Decals – 90
The platform and bodywork are ruggedly constructed, designed for durability and ease of maintenance. Case branding and decals reflect the robust identity of the L-Series machines.

Key Highlights

• Engine: Case/FPT 6.7 L turbocharged diesel, 156 gross HP / 144 net HP
• Operating weight: 35,200 – 37,600 lb (XLT / LGP)
• Max torque: 493 lb-ft @ 1,400 rpm
• Hydrostatic dual-path drive with infinite variable control
• Fuel capacity: 65 gallons; Hydraulic capacity: 26 gallons
• Hydraulic output: 35 GPM @ 2,830 psi
• Track system: 45 shoes per side, 24-in shoes, 118 in track-on-ground
• Blade: PAT blade, ~4.0 yd³ heaped capacity
• Electrical: 24-volt system with dual 12-volt batteries, 65-amp alternator
• ROPS/FOPS-certified cab with optional HVAC
• Optional rear rippers and winches for expanded versatility