Caterpillar 257B3 Track Loader Specifications

The Caterpillar 257B3 multi-terrain loader is powered by 207.5 cu.in (3.4L) Cat C3.4 DIT 4-cylinder turbocharged diesel engine with a rated power of 100 hp (74.6 kW). The Cat 257B3 is equipped with a two-speed hydrostatic transmission, vertical-lift loader boom, single level suspension undercarriage, and 12.6" (320 mm) durable rubber tracks. The hydraulic system has a pump with fluid flow rate of 22 gpm (83 lpm) or 31 gpm (117 lpm). The hydraulic pressure is 3335psi (230 bar). The loader has a rated operating capacity of 1870 lbs (848 kg) and tipping load of 5350 lbs (2426 kg). The lift height is 120.9" (3070 mm) to hinge pin, and dump height is 91" (2310 mm).

Engine Specs

Engine Model .................... Caterpillar C3.4 DIT
Engine Type .................... 4-cycle liquid cooled diesel
Number of Cylinders .................... 4, in-line
Displacement, cu.in (L) .................... 207.5 (3.40)
Cylinder Bore, in (mm) .................... 3.70 (94.0)
Piston Stroke, in (mm) .................... 4.72 (120.0)
Aspiration .................... Turbocharged
Rated Engine Power, hp (kW) .................... 71.0 (53.0)
Maximum Engine Power, hp (kW) .................... 74.0 (55.0)
Rated Engine Speed, rpm .................... 2500
Compression Ratio .................... 22:1
Firing Order .................... 1-3-4-2
Fuel System .................... Direct Injection
Air Cleaner .................... Dual element, radial seal
Emission Level .................... Tier 4 Interim
Fuel Tank Capacity, gal (L) .................... 22.2 (84.0)
Oil Capacity, qts (L) .................... 9.5 (9.0)
Coolant Capacity, qts (L) .................... 10.6 (10.0)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 90

Drive Train

Drive System Type .................... Hydrostatic direct drive
Number of Gears .................... 2 (low-high)
Pump Type .................... Axial-piston
Brakes Type .................... Hydraulic wet disc
Forward Speed (Low), mph (kph) .................... 6.9 (11.1)
Forward Speed (High), mph (kph) .................... 10.0 (16.1)
Reverse Speed (Low), mph (kph) .................... 6.9 (11.1)
Reverse Speed (High), mph (kph) .................... 10.0 (16.1)

Undercarriage

Tracks Type .................... Durable rubber track
Track Width, in (mm) .................... 12.6 (320)
Ground Pressure, psi (Bar) .................... 4.0 (0.276)
Ground Contact Area, in2 (m2) .................... 1770 (1.14)
Undercarriage Suspension .................... Single level

Hydraulic System

Hydraulic System Type .................... Open center
Hydraulic Pump Type .................... Gear
Pump Flow (Standard), gpm (Lpm) .................... 22.0 (83.0)
Pump Flow (High Flow), gpm (Lpm) .................... 31.0 (117.0)
System Pressure, Bar (psi) .................... 230 (3335)
Hydraulic Tank Capacity, gal (L) .................... 9.2 (35.0)
Hydraulic System Capacity, gal (L) .................... 14.5 (55.0)
Number of Valves .................... 3

Loader Performance

Rated Operating Capacity (35% tipping load), lbs (kg) .................... 1870 (848)
Rated Operating Capacity (50% tipping load), lbs (kg) .................... 2675 (1213)
Tipping Load, lbs (kg) .................... 5350 (2426)
Bucket Breakout Force, lbs (kg) .................... 4508 (2045)
Loader Boom Type .................... Vertical-lift

Dimensions and Weight

Length (Track On Ground), in (mm) .................... 59 (1500)
Length (w/o Bucket), in (mm) .................... 107 (2720)
Length (Bucket On Ground), in (mm) .................... 135.4 (3440)
Length of Undercarriage, in (mm) .................... 74.8 (1900)
Height (Operator Cab), in (mm) .................... 80 (2035)
Height (Boom Raised), in (mm) .................... 153 (3895)
Width (Max, w/o Bucket), in (mm) .................... 66 (1675)
Height to Hinge Pin (Fully Raised), in (mm) .................... 120.9 (3070)
Height to Hinge Pin (Carry Position), in (mm) .................... 8.2 (210)
Dump Angle At Max Height, deg .................... 52
Dump Height (Fully Raised), in (mm) .................... 91 (2310)
Dump Reach At Max Height, in (mm) .................... 30 (760)
Rollback Angle At Max Height, deg .................... 87
Departure Angle, deg .................... 35
Bucket Width, in (mm) .................... 72 (1830)
Ground Clearance, in (mm) .................... 9.6 (245)
Turning Radius (w/Bucket), in (mm) .................... 86.2 (2190)
Shipping Weight, lbs (kg) .................... 7330 (3330)
Operating Weight, lbs (kg) .................... 8060 (3655)