Off-Highway Trucks
Cat 773
Payload
56.5t
Body Capacity
35.75m³
Loaded Speed
66.9km/hr

G Series represents a new era for the 773, and with your long-term success as our goal, we've developed this truck to be more productive and economical. It offers your operators the confidence, comfort and control to run at peak efficiency, and it can feed your crushers and haul material at a lower cost per ton. When you also consider its performance and fuel efficiency, the 773G is the right truck for our generation.
Specifications
Payload
56.5t
Body Capacity
35.75m³
Loaded Speed
66.9km/hr
Operating Weight
102,740kg
Power
578kW (785.8hp)
Specifications
Engine
Bore
137mm
Displacement
27l
Engine Model
Cat® C27
Engine Power - ISO 14396
570kW
Gross Power - SAE J1995
578kW
Net Power - 80/1269/EEC
568kW
Net Power - ISO 9249
568kW
Net Power - SAE J1349
536kW
Net Torque
4269N·m
Note (1)
Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
Note (2)
Ratings based on SAE J1995 standard air conditions of 25° C (77° F) and 100 kPa (29.61 Hg) barometer. Power based on fuel having API gravity of 35 at 16° C (60° F) and an LHV of 42 780 kJ/kg (18,390 BTU/lb) when engine used at 30° C (86° F).
Note (3)
No engine derating required up to 3048 m (10,000 ft) for Tier 4/Stage V.
Peak Torque - Speed
1200r/min
Rated Engine Speed
1800r/min
Stroke
152mm
Weights - Approximate
Maximum Gross Vehicle Weight
102739kg
Operating Specifications
Body Capacity - SAE 2:1
35.8m³
Maximum Allowable Payload (120%)*
66.4t
Maximum Working Payload (110%)
60.8t
Nominal Payload Class (100%)
55.3t
Note (1)
Capacity with Dual Slope body – no liner.
Note (2)
* Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
Target Payload (100%)
55.3t
Top Speed - Loaded
66.9km/h
Transmission
Forward - 1
10.6km/h
Forward - 2
15km/h
Forward - 3
20.3km/h
Forward - 4
27km/h
Forward - 5
36.7km/h
Forward - 6
49.4km/h
Forward - 7
66.9km/h
Note
Maximum travel speeds with standard 24.00R35 (E4) tires.
Reverse
14km/h
Final Drives
Differential Ratio
3.64:1
Planetary Ratio
4.80:1
Total Reduction Ratio
17.49:1
Brakes
Brake Standards
ISO 3450:2011
Brake Surface - Front
655cm²
Brake Surface - Rear
61269cm²
Body Hoists
Body Lower Time - Float
14s
Body Power Down - High Idle
14s
Body Raise Time - High Idle
10s
Pump Flow - High Idle
448l/min
Relief Valve Setting - Lower
3450kPa
Relief Valve Setting - Raise
17250kPa
Capacity - Dual Slope - 100% Fill Factor
Heaped (SAE 2:1)*
35.75m³
Note (1)
Contact your local Cat dealer for body recommendation.
Note (2)
* ISO 6483:1980.
Struck
26.86m³
Capacity - Flat Floor - 100% Fill Factor
Heaped (SAE 2:1)*
35.49m³
Note (1)
Contact your local Cat dealer for body recommendation.
Note (2)
* ISO 6483:1980.
Struck
26.25m³
Weight Distributions - Approximate
Front Axle - Empty
53%
Front Axle - Loaded
35%
Rear Axle - Empty
47%
Rear Axle - Loaded
65%
Suspension
Empty Loaded Cylinder Stroke Front
234mm
Empty Loaded Cylinder Stroke Rear
149mm
Rear axle - Oscillation
8.1°
Service Refill Capacities
Brake/Hoist Hydraulic Tank
176l
Brake Hoist System
322l
Cooling System
171l
Crankcase
90l
Differential - Final Drives
145l
Fuel Tank
795l
Steering System - Including Tank
54l
Steering Tank
36l
Torque Converter - Transmission System - HRC
70l
Tires
Note (1)
Productive capabilities of the 773G truck are such that, under certain job conditions, TKPH (TMPH) capabilities of standard or optional tires could be exceeded and, therefore, limit production.
Note (2)
Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
Standard Tire
24.00R35 (E4)
ROPS
FOPS Standards
Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
ROPS Standards
Rollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
Sound
Sound Standards (1)
The operator Equivalent Sound Pressure Level (Leq) is 76 dB(A) when SAE J1166 FEB2008 is used to measure the value for an enclosed cab. This is a work cycle sound exposure level. The cab was properly installed and maintained. The test was conducted with the cab doors and the cab windows closed.
Sound Standards (2)
The exterior sound pressure level for the standard machine measured at a distance of 15 m (49 ft) according to the test procedures specified in SAE J88:2008, mid‑gear moving operation is 86 dB(A).
Sound Standards (3)
Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment.
Steering
Steer Angle
31°
Steering Standards
SAE J1511 FEB94 ISO 5010:1992
Turning Circle - Clearance Diameter
26.1m
Turning Diameter - Front
23.5m
GALLERY

How does the 773 Compare?
-
Off-Highway Trucks Cat 773
Payload56.5tBody Capacity35.75m³Loaded Speed66.9km/hrSELECTED MODEL -
Off-Highway Trucks Cat 772G
Payload47.2tBody Capacity31.2m³Loaded Speed79.7km/hr -
Off-Highway Trucks Cat 775G
Payload64tBody Capacity42.23m³Loaded Speed66.9km/hr