Used CAT 312D Excavator | Hydraulic Ready for Work

Name: Used CAT 312D Excavator | Hydraulic Ready for Work - Taihongmachinery
Price: 29000.00 USD
Availability: InStock

1-2 Unit$30,000

>=3 Units$29,000

（Price is FOB . Contact WhatsApp for CIF price & shipping cost.）

Used excavator, cat excavator, crawler excavator: actual CAT 312D fuel consumption 15-20L/hr. Real-world data for buyers. Read full guide.

Brand	CAT
Model Number	312D
Country of Origin	Japan
Year	2024
Working Hours	500H

Categories: Caterpillar, Excavator

Tags: cat, Construction Machinery, crawler excavator, Used CAT 312D, used excavator

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Product Specifications

No	Item	Data
1	Type	卡特312D2GC
2	Operating weight	12500kg
3	Bucket capacity	0.53m³
4	Boom length	4650mm
5	Stick length	2500mm
6	Rotation speed	11.2rpm
7	Walking speed	3.2-5.1km/h
8	Gradeability	35°/70°
9	Bucket digging force	95KN
10	Stick digging force	65KN
11	Engine model	Cat 3054C
12	Rated power	59kw
13	Hydraulic pump	Cat
14	Distribution valve	Cat
15	Displacement	4.4L
16	No. of cylinders	4
17	Cooling method	water-cooling
18	Fuel tank	250L
19	Length	7610mm
20	Width	2490mm
21	Height	2830mm
22	Maximum excavation radius of the parking surface	8180mm
23	Maximum excavation depth	5540mm
24	Maximum excavation height	8490mm
25	Maximum unloading height	6100mm
26	Maximum vertical excavation depth	4910mm

Product Pictures

Expert Inspection Report

The Caterpillar 312D has long been a staple in the 13-ton class, known for its exceptional balance of power and fuel efficiency. As a pre-owned machine, it remains one of the most sought-after models in the global market due to its rugged build and ease of maintenance.

1. Performance & Power

Equipped with the CAT C4.2 ACERT™ engine, the 312D delivers impressive net power and torque. Its hydraulic system is finely tuned, offering smooth, multi-function control that allows operators to multitask (swinging and booming) without losing speed.

Expert Note: Even with higher working hours, a well-maintained 312D engine shows remarkable resilience in tropical or high-dust environments.

2. Durability & Build Quality

Caterpillar’s undercarriage is legendary. The 312D features a heavy-duty frame designed to handle rocky terrain and demolition tasks. For buyers in the second-hand market, this means less worry about structural cracks or premature wear on the track links.

3. Operator Comfort & Safety

The cab is designed for long shifts. It features:

Low Noise Levels: Excellent insulation reduces fatigue.
Visibility: Large glass areas provide a clear view of the working site.
Ergonomics: Pilot-operated joysticks are intuitive and precise.

4. Maintenance & Resale Value

This is where the 312D shines for exporters. Parts are available in almost every country, from Southeast Asia to Africa. Its high resale value makes it a “safe investment”—you can run it for years and still find a buyer when it’s time to upgrade.

Company Description

Taihongmachinery (TH Engineering Equipment Limited) is a premier global supplier specializing in the export of high-quality, pre-owned heavy construction equipment.
Our company sells Caterpillar,Komatsu,Sany,Doosan,Hyundai,Hitachi,Volvo,Kubota used excavators, used bulldozers, used loaders, used graders, used cranes, used rollers, etc. With a strategic focus on the international trade of used excavators, we have established ourselves as a cornerstone of reliability for clients across Southeast Asia, South Asia, the Middle East, Africa, and South America.

Shipping & Delivery Policy

At Taihong Machinery, we provide flexible global logistics solutions for all our used heavy machinery.

Shipping Method: We recommend working with professional international freight forwarders specializing in heavy equipment (RORO or Flat Rack container shipping).

Flexibility: We are happy to work with your preferred freight forwarder. If you do not have one, we can leverage our network of reliable, certified global logistics partners to provide competitive shipping quotes to your nearest port.

Preparation: All machines undergo professional cleaning and safety inspections prior to loading to ensure they meet international shipping regulations.

Documentation: We provide all necessary export documentation, including Bills of Lading, Packing Lists, and Commercial Invoices, to ensure smooth customs clearance at the destination.

Return & Refund Policy

We provide a detailed pre-shipment inspection report and live video call to confirm machine condition. Returns are generally not accepted, but if the machine does not match the inspection report, we will negotiate a resolution.

Inspection: We encourage all buyers to conduct a thorough inspection of the machine, either in person at our yard in China or via live video consultation with our technicians.

Pre-shipment Verification: Before the machine leaves our yard, we provide a full functional test report and live video proof of the engine, hydraulic, and structural condition. Once the buyer confirms the machine status and the machine is loaded for export, we do not accept returns.

Warranty: All equipment is sold in “as-is” condition. We are committed to transparency and will disclose all known technical details prior to purchase.

Support: Should any issues arise during the shipping process, we will provide full support in communicating with your insurance provider and the shipping line.

Success Cases

The CAT 312D is equipped with the 3054C engine with 4.4L displacement, producing 67 kW (90 hp) of net power . Based on real-world operational data, the fuel consumption ranges between 15–20 liters per hour under standard working conditions .

Several factors influence actual consumption:

Factor	Impact on Fuel Consumption
Work intensity (heavy digging vs. light loading)	±20% variation
Operator technique	Up to 15% difference
Maintenance condition (clogged filters, worn injectors)	+10–30% increase
Attachment type (hydraulic hammer vs. bucket)	+25–50% increase

Pro Tip for Buyers: When inspecting a used unit, check the machine’s average fuel consumption history via the monitor panel if available. Well-maintained units typically operate at the lower end of the 15–20 L/hour range.

The CAT 312D is classified as a 12–14 ton class hydraulic excavator. Here are the critical specifications every buyer should verify:

Parameter	Value
Operating Weight (Long Undercarriage)	13,200 – 13,900 kg (29,100 – 30,640 lbs)
Operating Weight (Standard Undercarriage)	12,900 – 13,600 kg (28,440 – 29,980 lbs)
Bucket Capacity (Standard)	0.52 – 0.65 m³
Engine Model	Caterpillar 3054C
Net Power	67 kW (90 hp) @ 2,000 rpm
Fuel Tank Capacity	250 L (66 US gal)
Hydraulic Tank Capacity	90.6 L (24 US gal)

Distinction from 312D2 GC: The standard 312D offers higher operating weight and different hydraulic flow characteristics compared to the 312D2 GC variant (which has 56 kW / 75 hp) . Always verify the serial number prefix (KCDxxxxx and above for standard 312D) .

The CAT 312D features a load-sensing hydraulic system with impressive power output. The system parameters are:

Hydraulic Parameter	Value
Main Pump Maximum Flow	254 L/min (67 gpm) total
Swing System Flow	127 L/min (34 gpm)
Pilot System Flow	21.9 L/min
Maximum Equipment Pressure	30,500 kPa (4,420 psi)
Swing Pressure	23,000 kPa (3,340 psi)
Travel Pressure	35,000 kPa (5,080 psi)
Pilot Pressure	4,120 kPa (600 psi)

Performance Output:

Bucket Digging Force: 96 kN
Stick Digging Force: 62 kN
Swing Torque: 30.9 kN·m
Swing Speed: 12.2 r/min

The system features a 2% hydraulic pressure increase compared to previous models, improving lifting and digging forces. Additionally, auxiliary hydraulic lines are integrated into the boom base, reducing line length by up to 30% and minimizing friction loss for better efficiency .

The CAT 312D is renowned for its durability, with many units achieving 10,000–15,000 operating hours before major overhaul when properly maintained. Here’s what buyers should know:

Common High-hour Issues by Hour Range:

Hour Range	Typical Maintenance Items
5,000 – 7,000 hours	Swing bearing inspection, hydraulic hose replacement
7,000 – 9,000 hours	Main pump rebuild, travel motor seals
9,000 – 12,000 hours	Engine injectors, turbocharger inspection
12,000+ hours	Complete hydraulic system overhaul, engine rebuild

Durability Indicators to Check:

Undercarriage wear: Track link height should exceed 70% of new spec (new: ~18mm rail height)
Swing bearing play: Should not exceed 3–5 mm of radial movement
Cylinder leak-by: Rod drift should be under 10 mm/minute
Engine condition: No excessive blow-by from crankcase breather

Buyer’s Note: 2011 production year units (serial KCD prefix) are considered particularly reliable, with many users reporting 8,000+ hours with only routine maintenance . The 6244-page service manual covers all repair procedures for serial numbers KCD00001 and up .

Annual operating costs for a used CAT 312D typically range between $5,000–$12,000 USD depending on hours worked and local parts pricing. Here is a detailed breakdown:

Cost Category	Interval	Estimated Cost (USD)
Engine oil + filter change	500 hours	$180 – $250
Hydraulic oil change	2,000 hours	$600 – $850 (104L total system capacity)
Fuel filters	500 hours	$40 – $60 (set of 2)
Air filter	1,000 hours	$80 – $120
Swing drive oil change	1,000 hours	$30 – $50 (3L capacity)
Travel drive oil change (both sides)	1,000 hours	$60 – $90 (3L each side)
Grease (all pivot points)	10 hours	$15 – $25 per 50-hour week

Major Component Replacement Costs (Reference):

Undercarriage (full set): $4,500 – $7,500 (depending on aftermarket vs. OEM)
Main hydraulic pump (remanufactured): $3,000 – $5,000
Swing motor (rebuilt): $1,200 – $2,000
Engine injectors (set of 4): $600 – $1,200
Track shoes (per side, 770mm/30″): $800 – $1,500

Cost-Saving Tip: The CAT 312D uses the widely available 3054C engine (Perkins-based platform), which means aftermarket parts are abundant and typically 30–40% cheaper than genuine CAT parts for non-critical components. However, for hydraulic components, OEM parts are recommended due to tighter tolerances .