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John Deere 550 H Series Crawler Dozers

Engine 550H LT 550H LGP
Type
John Deere 4045T with altitude-compensating
turbocharger
Rated power @ 2,200 rpm 80 SAE net hp (60 kW) 84 SAE net hp (63 kW)
Cylinders, wet sleeve
4
Displacement
276 cu. in. (4.52 L)
Fuel consumption, typical
1.7 to 2.6 gal./hr. (6.4 to 9.8 L/h)
Maximum net torque 255 lb.-ft. (344 Nm) @ 1,200 rpm 276 lb.-ft. (372 Nm) @ 1,200 rpm
Lubrication
Pressure system with full-flow spin-on filter and oil-to-water cooler
Air cleaner
Dual stage dry type with safety element, precleaner, and dash-mounted restriction indicator
Electrical system
12 volt with 65-amp alternator
Cooling fan
Blower

Transmission
Dual-path, electronic-controlled, hydrostatic drive; load-sensing feature automatically adjusts speed and power to match changing load conditions; each individual track is powered by a variable-displacement piston pump and two-speed motor combination; decelerator controls speed from holding to 5.0 mph (8.0 km/h)
Travel speeds (infinitely variable)
Forward and reverse ........................................0 to 5.0 mph (0 to 8.0 km/h)
Final Drives
Heavy-duty triple-reduction final drives attach directly to the mainframe and are isolated from track frame and dozer frame loads
Steering
Single-lever steering, direction control, and counterrotation; full power turns and infinitely variable track speeds provide unlimited maneuverability and optimum control; hydrostatic steering eliminates steering clutches and brakes.
Brakes
Hydrostatic (dynamic) braking stops the machine whenever the direction-control lever is moved to neutral, whenever the decelerator is depressed to the end of travel, or whenever the brake pedal is depressed.
Automatic Park Brake
Exclusive safety feature engages wet, multiple-disc brakes automatically whenever the engine stops, whenever the operator applies the brake pedal, or whenever the neutral start lever lock is in the stop position; machine cannot be driven with brake applied, reducing wear out or need for adjustment.
Hydraulic System
System: open center
Pressure, main relief: 3,000 psi (20 685 kPa)
Pump: gear
Flow: 15 gpm (56.8 L/min.) @ 2,200 rpm
Filter, return oil: 10 micron
Control: T-bar three function
Cylinders: heat-treated, chrome-plated, polished cylinder rods, hardened steel (replaceable bushings) pivot pins
Capacities (U.S.)
Fuel tank with lockable cap: 47 gal. (178 L)
Cooling system with coolant recovery tank: 17 qt. (16 L)
Engine oil including spin-on filter: 15 qt. (14 L)
Transmission reservoir refill with filter change: 11.3 gal. (42.7 L)
Final drive (each): 7 qt. (6.6 L)
Hydraulic reservoir refill with filter change: 8.5 gal. (32.2 L)
All power train and hydraulic systems allow 45-degree maximum operation.

John Deere Dura-Trax™ features large deep-heat-treated components; pins and bushings are sealed for life; rollers and idlers are permanently sealed and lubricated; fulllength
track frame covers reduce material buildup and ease cleaning
Undercarriage 550H LT 550H LGP  
Grouser width (closed center, single bar) 18 in. (457 mm) 24 in. (610 mm)  
Track shoes, each side 40 40  
Ground contact area 3,096 sq. in. (19 974 cm2) 4,128 sq. in. (26 632 cm2)  
Ground pressure 5.4 psi (37.2 kPa) 4.2 psi (29.0 kPa)  
Ground clearance with single-bar grouser
(excluding grouser height)
13.6 in. (345 mm) 13.6 in. (345 mm)  
Length of track on ground 86 in. (2184 mm) 86 in. (2184 mm)  
Track gauge, standard 61 in. (1550 mm) 69 in. (1753 mm)  
Track rollers, each side 6 6  
Track pitch 6.29 in. (160 mm) 6.29 in. (160 mm)  


Dimensions 550H LT 550H LGP
Overall height with ROPS or cab
108 in. (2743 mm)
Overall length
159 in. (4040 mm)
Overall length with extended drawbar
161 in. (4090 mm)
Ground clearance, minimum
Single-bar grouser
13.6 in. (345 mm)
Swamp shoes
14.4 in. (366 mm)
Blade lift height
31.4 in. (797 mm)
Blade digging depth
20.6 in. (523 mm)
Blade cutting edge angle, three position
adjustable
52, 56, or 60 degrees


SAE Operating Weights
Base weights were computed for units with standard equipment, rollover protective structures, full fuel tanks, and 175lb. (79 kg) operators.

105-in. (2667 mm) blade and 18-in. (457 mm) track shoes -

550 H LT: 16,800 lb. (7636 kg)

128-in. (3251 mm) blade and 24-in. (610 mm) track shoes -

550 H LGP:
17,500 lb. (7437 kg)



Specifications subject to change. Please contact your local dealer for more detailed information.

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