312D/312D L Hydraulic Excavator
Achieve high productivity and lower operating costs with the Cat® 312D Hydraulic Excavator. Unmatched versatility, improved controllability, easy operation and a comfortable, redesigned operator station help make the 312D an industry-leading performer.
Operator Station
Spacious and quiet, this world class cab lets the operator focus on performance and production.
Prestart Check and Monitor Display
Engine
Move more material using less fuel with the Cat C4.2 ACERT engine. It meets Tier 3 and EU Stage IIIA emissions while providing additional power and performance.
Automatic Engine Control and Fuel Delivery
Hydraulics
Boom and Stick Regeneration Circuit
Undercarriage/Structures
Front Linkage
Versatility
Easily configure a large variety of work tools with the Cat Tool Control System.
Hydraulic Pin Grabber
Enhanced Systems
Serviceability
Technology Products
AccuGrade Site Reference System
AccuGrade Laser Reference System
Customer Support
Your Cat dealer is ready to assist you with your purchase decision and everything after.
Engine
Engine Model |
Cat® C4.2 ACERT™ |
Flywheel Power |
90 hp |
Gross Power |
97 hp |
SAE J1349 |
90 hp |
Bore |
4 in |
Stroke |
5.1 in |
Displacement |
259 in3 |
Net Power (SAE J1349) |
90 hp |
Weights
Operating Weight |
28480 lb |
Operating Weight - Standard Undercarriage |
28480 lb |
Operating Weight - Long Undercarriage |
29650 lb |
Drive
Maximum Drawbar Pull |
25600 lb |
Travel Speed |
3.4 mph |
Swing Mechanism
Swing Torque |
22830 lb ft |
Swing Speed |
12.4 RPM |
Hydraulic System
Main Implement System - Maximum Flow (2x) |
33.5 gal/min |
Maximum Pressure - Implements |
4424 psi |
Maximum Pressure - Travel |
3340 psi |
Maximum Pressure - Swing |
3336 psi |
Pilot System - Maximum Flow |
9.5 gal/min |
Pilot System - Maximum Pressure |
598 psi |
Blade System - Maximum Pressure |
2990 psi |
Boom Cylinder - Bore |
4.3 in |
Boom Cylinder - Stroke |
40 in |
Stick Cylinder - Bore |
4.7 in |
Stick Cylinder - Stroke |
47.1 in |
Bucket Cylinder - Bore |
3.9 in |
Bucket Cylinder - Stroke |
37 in |
Service Refill Capacities
Fuel Tank |
66 gal |
Cooling System |
4.7 gal |
Engine Oil |
4.6 gal |
Swing Drive (each) |
.79 gal |
Final Drive (Each) |
.79 gal |
Hydraulic System (Including Tank) |
27.5 gal |
Hydraulic Tank |
23.9 gal |