# 1979 Caterpillar 12G for Sale in Spy Hill, Sk

**URL:** <https://www.constructionequipmentguide.com/used-equipment/caterpillar/motor-graders/12g/id/88692367>

## Listing details

- **Price:** Auction pricing
- **Listing ID:** 88692367
- **Year:** 1979
- **Manufacturer:** Caterpillar
- **Model:** 12G
- **Category:** Motor Graders
- **Serial number:** 61M07066
- **Location:** Spy Hill, Sk
- **Auction starts:** 2026-10-07

## Description

Enclosed Cab, Air Ride Seat, 14 ft / 4.27 m Moldboard, 14.00-24 Tires

## Manufacturer specifications

### Circle

- **Blade Tip Angle - Front:** 90 degrees
- **Blade Tip Angle - Rear:** 90 degrees
- **Diameter:** 60.3 in (153.16 cm)
- **Max Lift Above Ground:** 17.3 in (43.94 cm)
- **Max Reach Outside Tires - Left:** 72.1 in (183.13 cm)
- **Max Reach Outside Tires - Right:** 73.7 in (187.2 cm)
- **Rotation:** 360 degrees

### Dimensions

- **Blade Base:** 8.44 ft (2.57 m)
- **Height:** 10.75 ft (3.28 m)
- **Height To Top Of Isomount Cab:** 10.93 ft (3.33 m)
- **Length:** 27.25 ft (8.31 m)
- **Overall Length:** 27.27 ft (8.31 m)
- **Tandem Axle Wheelbase:** 4.99 ft (1.52 m)
- **Weight:** 29860 lbs (13544.28 kg)
- **Wheelbase:** 19.43 ft (5.92 m)
- **Width:** 7.75 ft (2.36 m)
- **Width Over Tires:** 7.91 ft (2.41 m)

### Engine

- **Displacement:** 640.8 cu in (10500.85 cu cm)
- **Engine Make:** 2236
- **Max Power:** 135 hp (100.67 kw)
- **Net Power Gear 5-6:** 135 hp (100.67 kw)
- **Number Of Cylinders:** 6
- **Power Measured @:** 2200 rpm

### Front Axle

- **Ground Clearance:** 2.1 ft (0.64 m)
- **Oscillation - Total:** 32 degrees
- **Wheel Lean:** 18 degrees

### Hydraulic System

- **Pump Flow:** 51 gpm (193.04 lpm)
- **Pump Type:** closed-center, constant-pressure system w/ variable displacement piston
- **Relief Valve Pressure:** 2150 psi

### Moldboard

- **Max Depth Of Cut:** 17.8 in (45.21 cm)
- **Moldboard Height:** 24.1 in (61.21 cm)
- **Moldboard Thickness:** 0.9 in (2.29 cm)
- **Moldboard Width:** 12 ft (3.66 m)
- **Side Shift Left:** 26.4 in (67.06 cm)
- **Side Shift Right:** 20.5 in (52.07 cm)

### Operational

- **Alternator Supplied Amperage:** 19 amps
- **Cooling System Fluid Capacity:** 12.5 gal (47.31 l)
- **Fuel Capacity:** 74.8 gal (283.12 l)
- **Hydraulic System Fluid Capacity:** 20.1 gal (76.08 l)
- **Max Operation Weight - Front Axle:** 9987 lbs (4530.03 kg)
- **Max Operation Weight - Rear Axle:** 21605.4 lbs (9800.06 kg)
- **Max Operation Weight - Total:** 31592.3 lbs (14330.04 kg)
- **Oil System Fluid Capacity:** 7.7 gal (29.14 l)
- **Operating Voltage:** 24 V
- **Std Operation Weight - Front Axle:** 7870.6 lbs (3570.05 kg)
- **Std Operation Weight - Rear Axle:** 20128.3 lbs (9130.05 kg)
- **Std Operation Weight - Total:** 27998.8 lbs (12700.06 kg)
- **Tandem Case Fluid Capacity (Each):** 17 gal (64.35 l)
- **Transmission Fluid Capacity:** 23 gal (87.06 l)

### Steering

- **Articulation Angle:** 50 degrees
- **Turning Radius:** 24 ft (7.32 m)

### Transmission

- **Max Speed - Forward:** 25.5 mph (41.04 kph)
- **Max Speed - Reverse:** 25.5 mph (41.04 kph)
- **Number Of Gears - Forward:** 6
- **Number Of Gears - Reverse:** 6
- **Transmission Type:** Cat-built direct drive power shift

## About this model

The Caterpillar 12G is a motor grader designed for grading, leveling, ditching, and road maintenance applications. Built as part of Caterpillar's G-series lineup, the 12G is commonly used in construction, mining, and municipal work where precise blade control and reliable traction are required. It features a mid-size frame, articulated steering, and a moldboard system suited for fine grading and surface shaping. The 12G is known for mechanical simplicity, serviceability, and durable components. As a used equipment model, it remains relevant in fleets needing a dependable grader for earthmoving, site preparation, and maintenance tasks.

## Photos

![1979 Caterpillar 12G](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/232f7158-6014-47cf-9661-6c5f6a40177f-hr.jpg)

![1979 Caterpillar 12G photo 2](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/575eed87-3f37-46c0-b306-7c6583978776-hr.jpg)

![1979 Caterpillar 12G photo 3](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/c929472e-38f8-45a0-98cd-ebca56e04a6c-hr.jpg)

![1979 Caterpillar 12G photo 4](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/c1d6a17e-1dad-4fa6-ba91-b6e6f5a90a57-hr.jpg)

![1979 Caterpillar 12G photo 5](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/c6a0791c-8c94-46ee-a9c7-3af41f553300-hr.jpg)

![1979 Caterpillar 12G photo 6](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/fc422add-a38c-4f56-b8bb-7dd18291356a-hr.jpg)

![1979 Caterpillar 12G photo 7](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22140/305/6a668964-be4c-45fa-ad4b-989f889d6633-hr.jpg)