Key Specifications
Engine: John Deere PowerTech 4.5L (4045T), ~71-74 hp.
Transmission: Hydrostatic, dual-path, allowing for independent track control.
Blade: Power-Angle-Tilt (PAT), often around 8-9 ft wide.
Ground Pressure: Low, around 4.3 psi (with standard shoes).
Operating Weight: Approx. 18,000 lbs (8,165 kg).
Track: Wide for LGP, with 24-inch shoes common. 
 
Dimensions
Dimensions
Length W/ Blade - 13.17ft in
Width Over Tracks - 6.59ft in
Height To Top Of Cab - 9ft in
Length Of Track On Ground - 7.17ft in
Ground Clearance - 1.15ft in
 
Undercarriage
Track Gauge - 5.42ft in
Standard Shoe Size - 24.02in
Number Of Track Rollers Per Side - 6
Ground Pressure - 4.25psi
Number Of Shoes Per Side - 40
Ground Contact Area - 4128in2
Track Pitch - 6.3in
 
Specifications
Engine
Number Of Cylinders - 4
Engine Make - 2240
Engine Model - 4045T
Net Power - 74hp
Power Measured @ - 2200rpm
Max Torque - 251.6lb ft
Displacement - 276cu in
Torque Measured @ - 1200rpm
Aspiration - Altitude-compensating turbocharger
 
Operational
Operating Weight - 17562.1lb
Fuel Capacity - 47gal
Cooling System Fluid Capacity - 4.3gal
Engine Oil Capacity - 3.7gal
Hydraulic Fluid Capacity - 8.5gal
Powertrain Fluid Capacity - 11.3gal
Final Drives Fluid Capacity - 1.8gal
Operating Voltage - 12V
Alternator Supplied Amperage - 65amps
 
Transmission
Transmission Type - Hydrostatic
Max Speed - Forward - 5mph
Max Speed - Reverse - 5mph
 
Hydraulic System
Pump Type - Gear
Relief Valve Pressure - 3000psi
Pump Flow Capacity - 15gal/min
 
Standard Blade
Width - 8.1ft in
Height - 32.6in
Capacity - 2yd3
Blade Angle (Both Directions) - 22.2degrees
Cutting Depth - 20.8in
 
https://www.ritchiespecs.com/model/john-deere-450j-lgp-crawler-tractor