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Caterpillar 257B Specifications
The
Cat 257B multi-terrain loader is powered by 134.1 cu.in (2.2L) Caterpillar
3024CT 4-cylinder turbocharged diesel engine with a rated power of 100 hp (74.6
kW) at 2600 rpm. The Caterpillar 257B is equipped with a 2-speed hydro
transmission, vertical-lift loader boom, positive track drive, and 15" (380 mm)
rubber track undercarriage. The hydraulic system has a pump with fluid flow rate
of 15.6 gpm (60 lpm) or 26 gpm (100 lpm). The hydraulic pressure is 3335 psi
(230 bar). The loader has a rated operating capacity of 1615 lbs (732 kg)
and tipping load of 4620 lbs (2095 kg). The boom lifting force is 3683 lbs (1670
kg), and bucket breakout force is 3732 lbs (1693 kg).
| Engine Specs |
Engine Model .................... Caterpillar 3024CT
Engine Type .................... 4-cycle liquid cooled diesel
Number of Cylinders .................... 4, in-line
Displacement, cu.in (L) .................... 134.1 (2.19)
Cylinder Bore, in (mm) .................... 3.31 (84.0)
Piston Stroke, in (mm) .................... 3.94 (100.0)
Aspiration .................... Turbocharged
Rated Engine Power, hp (kW) .................... 57.0 (43.0)
Maximum Engine Power, hp (kW) .................... 62.0 (46.0)
Rated Engine Speed, rpm .................... 2600
Compression Ratio .................... 23.3:1
Firing Order .................... 1-3-4-2
Fuel System .................... Direct Injection
Air Cleaner .................... Dual element, radial seal
Valve Lash, in (mm) .................... 0.008 (0.20)
Fuel Tank Capacity, gal (L) .................... 20.3 (77.0)
Oil Capacity, qts (L) .................... 7.4 (7.0)
Coolant Capacity, qts (L) .................... 10.6 (10.0)
Electrical System Rating, Volts .................... 12
Charging System .................... Alternator
Alternator Rating, Amps .................... 85
| Drive Train |
Drive System Type .................... Hydrostatic direct drive
Number of Gears .................... Single
Pump Type .................... Axial-piston
Brakes Type .................... Hydraulic wet disc
Forward Speed, mph (kph) .................... 7.1 (11.4)
Reverse Speed, mph (kph) .................... 7.1 (11.4)
| Undercarriage |
Tracks Type .................... Durable rubber track
Track Width, in (mm) .................... 15 (380)
Ground Pressure, psi (Bar) .................... 4.3 (0.297)
Ground Contact Area, in2 (m2) .................... 1770 (1.14)
Undercarriage Suspension .................... Heavy-duty, torsion axles
| Hydraulic System |
Hydraulic System Type .................... Open center
Hydraulic Pump Type .................... Gear
Pump Flow (Standard), gpm (Lpm) .................... 15.6 (60.0)
Pump Flow (High Flow), gpm (Lpm) .................... 26.0 (100.0)
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) .................... 1615 (732)
Rated Operating Capacity (50% tipping load), lbs (kg) .................... 2310 (1047)
Tipping Load, lbs (kg) .................... 4620 (2095)
Boom Lifting Force, lbs (kg) .................... 3683 (1670)
Bucket Breakout Force, lbs (kg) .................... 3732 (1693)
Loader Boom Type .................... Vertical-lift
| Dimensions and Weight |
Length (Track On Ground), in (mm) .................... 59 (1500)
Length (w/o Bucket), in (mm) .................... 106.3 (2700)
Length (Bucket On Ground), in (mm) .................... 137.4 (3490)
Length of Undercarriage, in (mm) .................... 74.8 (1900)
Height (Operator Cab), in (mm) .................... 79.7 (2025)
Height (Boom Raised), in (mm) .................... 156 (3965)
Width (Max, w/o Bucket), in (mm) .................... 66 (1675)
Height to Hinge Pin (Fully Raised), in (mm) .................... 119 (3020)
Height to Hinge Pin (Carry Position), in (mm) .................... 9.3 (235)
Dump Angle At Max Height, deg .................... 40
Dump Height (Fully Raised), in (mm) .................... 89.8 (2280)
Dump Reach At Max Height, in (mm) .................... 31 (790)
Rollback Angle At Max Height, deg .................... 96.7
Departure Angle, deg .................... 41
Bucket Width, in (mm) .................... 66 (1675)
Ground Clearance, in (mm) .................... 10 (255)
Turning Radius (w/Bucket), in (mm) .................... 90.8 (2305)
Shipping Weight, lbs (kg) .................... 6870 (3120)
Operating Weight, lbs (kg) .................... 7560 (3430)
Operating Weight (High Flow), lbs (kg) .................... 7650 (3470)
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| COMPACT TRACK LOADERS SPECIFICATIONS |