# Caterpillar 312F for Sale in Piscataway, NJ

**URL:** <https://www.constructionequipmentguide.com/used-equipment/caterpillar/excavators/312f/id/86771971>

## Listing details

- **Price:** $104,000.00 USD
- **Listing ID:** 86771971
- **Manufacturer:** Caterpillar
- **Model:** 312F
- **Category:** Excavators
- **Type:** Standard Excavators
- **Hours:** 3011
- **Serial number:** KMK10021
- **Location:** Piscataway, NJ

## Description

Air Conditioner, Auxiliary Hydraulics Pressure, Bucket, Coupler Type - Hydraulic, Fire Extinguisher, Lighting, Radio - AM FM Radio, Thumb Type - Hydraulic

## Machine details

### GENERAL APPEARANCE

- **Swing Drive and Gear Secure:** .

### SAFETY ITEMS

- **ROPS:** Yes
- **ROPS Certification Plate:** Yes

### OPERATOR STATION

- **Current O&MM:** Yes

### ENGINE

- **Blow By:** No
- **Knocking:** No
- **Oil Leaks:** No
- **Water in Oil:** No

### COOLING SYSTEM

- **Radiator:** Good
- **Water Pump:** Good

### ELECTRICAL, STARTING AND CHARGING SYSTEM

- **Alternator:** Good
- **Lighting:** Good
- **Starter:** Good

### HYDRAULICS

- **Boom Cylinder:** Good
- **Bucket Cylinder:** Good
- **Control Linkage:** Good
- **Hose Lines:** Good
- **Hydraulic Swivel:** Good
- **Operating Condition - HYDRAULICS:** Good
- **Pump Drive:** Good
- **Pumps & Valves:** Good
- **Stick Cylinder:** Good
- **Swing Gear:** Good
- **Swing Motors:** Good
- **Thumb Cylinder:** Good
- **Travel Motors:** Good

### ATTACHMENTS / WORK TOOLS

- **Thumb:** Yes

### BOOM

- **Boom Condition:** Good
- **Boom Pins:** Good
- **Pins & Bushings - BOOM:** Good

### STICK

- **Thumb:** 8'

### BUCKET

- **Quick Coupler:** Yes

### UNDERCARRIAGE

- **Pins & Bushings Turned?:** No

### COMMENTS, MISC. REPAIRS, GENERAL REMARKS

- **Pins & Bushings Turned?:** .
- **Pins & Bushings Turned?:** INSPECTED 11/13/25 @ 3011.5 HRS

## About this model

The Caterpillar 312F is a hydraulic excavator in Caterpillar's 12-ton class, designed for general excavation, trenching, site preparation, and utility work. It is powered by a fuel-efficient diesel engine and uses Caterpillar hydraulic systems for digging, lifting, and swing performance. The 312F is commonly configured with a standard boom, stick, and bucket, and may be equipped with auxiliary hydraulics for attachments. Operator features typically include a pressurized cab, ergonomic controls, and monitoring systems. The model is used in construction, landscaping, and municipal applications where compact size, maneuverability, and reliable digging capability are required.

## Photos

![Caterpillar 312F](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1kYjY5MDVjMDZiZGVlOTQ2OTk5OWRlNmVjYWRiOGYxZCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY2MzUwOQ==)

![Caterpillar 312F photo 2](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1iMjJhMjZlOWNkZmRkM2Y1Y2NlMjNhNmU5YjExYmYwMiYkdHh0PUZPTEVZJTJDJTIwSU5DLiYzMTYzMQ==)

![Caterpillar 312F photo 3](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1jZGEyMDk4NmQ1NjM4NjVmODMyNjVjYWZiZmVmYjhjMSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NDUx)

![Caterpillar 312F photo 4](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1kN2VjZjljMDY3NjcxMmI5ZjU5MGU1OTAzMGEwMDIxYiYkdHh0PUZPTEVZJTJDJTIwSU5DLiY4NjQ1)

![Caterpillar 312F photo 5](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1iMTdkNzQxMGQyZTgwMTNjZWI5MDIwZjlhZWQxOTIyNSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY1NDE4OA==)

![Caterpillar 312F photo 6](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lZTU4OWJlYmFlZGQ1YjcwYjhlZGNhZTQ1ZmE1M2FjMyYkdHh0PUZPTEVZJTJDJTIwSU5DLiYxMjA3Ng==)

![Caterpillar 312F photo 7](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mYjc3OWQ5ZmJlMGU5MzUxZWRiMDlkYmExNDI1MjQ3NiYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NTEy)

![Caterpillar 312F photo 8](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1jNTZlZGQ4Y2ZjNTQ1MDk1ODg2ZDkyZWZjNTc2ODRiMCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY2Mzg2)

![Caterpillar 312F photo 9](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mOTgxMDM2NzVlZjc3MTc2ZTNlMmZhYWQ4NWU5MGI4OSYkdHh0PUZPTEVZJTJDJTIwSU5DLiYzNDY5Mw==)

![Caterpillar 312F photo 10](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lNGRiOTk4YzFjNjQwZDQxOTRhZWEzODljMWVlY2Y3YiYkdHh0PUZPTEVZJTJDJTIwSU5DLiYxOTA1)

![Caterpillar 312F photo 11](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1hM2FkNzgyNTM4NjQ4YzIwYTE1MzgwYmExZTk2YmJkMCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NTcxMw==)

![Caterpillar 312F photo 12](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1hNTBiYjQ1YWM5ZjMyY2Q0ZmRmZTkwNDdlYzk4ZTBhOCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0MjUxMA==)

![Caterpillar 312F photo 13](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lN2VlMWFhZTI5ZmY0MGFmZWEwOTg4ZTI4M2RhNTk5OCYkdHh0PUZPTEVZJTJDJTIwSU5DLiYxMDQ3Mw==)

![Caterpillar 312F photo 14](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz04MjU5ODE5Mjk4ZmQ0NzAxYmE0ZDQzZDliYjA1NTY2ZSYkdHh0PUZPTEVZJTJDJTIwSU5DLiYyNjM1OQ==)

![Caterpillar 312F photo 15](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1kYjY3M2ZiYjMxNjZhZjAwYTNlYjgzNGY0MmJkOWM0MCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0MTc2MQ==)

![Caterpillar 312F photo 16](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1kYTI5YTIzZjc1ZWY3ZTdhZWM2ZGY5NTk5MmY4ODRjNCYkdHh0PUZPTEVZJTJDJTIwSU5DLiYxMzcwNg==)

![Caterpillar 312F photo 17](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1iN2RkYmNiZDQ2NDUxNGZlOWQ1Zjk4Yjk4ZWIzY2ZkZSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NDEwNw==)

![Caterpillar 312F photo 18](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lYWU0MmU2ZjNkOTlhMDNiZTdmMGYzZTgyOGE3OWE2YSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0ODMxNg==)

![Caterpillar 312F photo 19](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mYzNjMTdmNDU2NGQyNjY0ODQ5YzU0ZGZlZGUxNjM1OSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY2NDQ4OQ==)

![Caterpillar 312F photo 20](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mN2Y1NDg1MjUxMDY1MjNhZGVkMTg2NDQ4YTAzODVmOCYkdHh0PUZPTEVZJTJDJTIwSU5DLiYxNDAzNQ==)

![Caterpillar 312F photo 21](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mZjc2NzVmOTJmNDU3YzQyOGY1MTUxYTRmM2UwOWNmOSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY1MDA3NQ==)

![Caterpillar 312F photo 22](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1jMDNlYjEzZmFhZTc5NDJlYzkwYjgxMDUyZWFjYTQxYyYkdHh0PUZPTEVZJTJDJTIwSU5DLiYzMjg3OQ==)

![Caterpillar 312F photo 23](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz04ZjE1NWIwOGY0NmYwNTg3OGQ3ZjM1ZTQwMTYyOTVjMCYkdHh0PUZPTEVZJTJDJTIwSU5DLiY2MDk2OQ==)

![Caterpillar 312F photo 24](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz05NGFlN2I2OGQyMDI5OWJmOGMxODQ5YWU3NTRlNTFiYyYkdHh0PUZPTEVZJTJDJTIwSU5DLiYzNjIzMw==)

![Caterpillar 312F photo 25](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz04Mjg5ZmNmODAwNjcxMzhiYzU4NzQ5ZGE0YjNhZDNlYyYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0MDY0NQ==)

![Caterpillar 312F photo 26](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz05YzdmYTUwOGI5YjliZDhhYjU5OGY3M2JmMTFjNzJjMCYkdHh0PUZPTEVZJTJDJTIwSU5DLiYyNjI5MQ==)

![Caterpillar 312F photo 27](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1jN2E0ZTA0NDNkY2NmYTkzOGFjNDk1NjVkM2M1Y2JkMyYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NjA3Mg==)

![Caterpillar 312F photo 28](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1jZTA0MzJjNWNhMWJhNWRiZGE3MTlhNTBjODQ3MzdjMyYkdHh0PUZPTEVZJTJDJTIwSU5DLiYyMzQ1NA==)

![Caterpillar 312F photo 29](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lNGU0NWRmMWNmOTRhMWIxOTYzOWEwNzViYTBkYzI3YyYkdHh0PUZPTEVZJTJDJTIwSU5DLiY0NTEzMw==)

![Caterpillar 312F photo 30](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1lMjZlMzI1NTJlMDdkMDEzZmE4MzVhODUyZTc1YmJjYyYkdHh0PUZPTEVZJTJDJTIwSU5DLiYyMDE5Mw==)

![Caterpillar 312F photo 31](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1mZmM4MTU1ZDAwMmU3MzM1ZTI3Zjg3ZjJkYzczYzhiMSYkdHh0PUZPTEVZJTJDJTIwSU5DLiYzNzMxNw==)

![Caterpillar 312F photo 32](http://s7d2.scene7.com/is/image/CatUsedProduction/wtk?JHNyYz1iZjI1NTM5ZTQ1ZTc5NWQ3YjhjNjMyODgxMTk2MGQ1ZSYkdHh0PUZPTEVZJTJDJTIwSU5DLiY2MDA0)