# 1981 Caterpillar 621B

**URL:** <https://www.constructionequipmentguide.com/used-equipment/caterpillar/scrapers/621b/id/88928097>

> This machine has been sold or is not currently for sale.

## Listing details

- **Price:** Sold
- **Listing ID:** 88928097
- **Year:** 1981
- **Manufacturer:** Caterpillar
- **Model:** 621B
- **Category:** Scrapers
- **Type:** Open Bowl Scrapers
- **Hours:** 8252
- **Serial number:** 45P03005
- **Location:** Denver, Co
- **Auction starts:** 2026-08-26

## Description

Located in Lane 26 Spot 412, Enclosed Cab, 29.5R35 Tires Buyer is responsible for loading and removal of this item, Closing Time: 2026-08-27 04:03:10 PM

## Manufacturer specifications

### Bowl

- **Heaped Capacity:** 20.1 cu yd
- **Max Depth Of Cut:** 13.4 in (34.04 cm)
- **Rated Payload:** 47994.7 lbs (21766.3 kg)
- **Struck Capacity:** 14 cu yd
- **Width Of Cut:** 10 ft (3.05 m)

### Dimensions

- **Height:** 11 ft (3.35 m)
- **Height:** 11.9167 ft (3.63 m)
- **Length:** 41 ft (12.5 m)
- **Length:** 41.5833 ft (12.67 m)
- **Overall Height:** 11.91 ft (3.63 m)
- **Overall Length:** 41.67 ft (12.7 m)
- **Overall Width:** 11.32 ft (3.45 m)
- **Weight:** 67000 lbs (30390.73 kg)
- **Weight:** 66590 lbs (30204.75 kg)
- **Wheelbase:** 25.33 ft (7.72 m)
- **Width:** 11 ft (3.35 m)
- **Width:** 11.25 ft (3.43 m)

### Operational

- **Fuel Capacity:** 135 gal (510.98 l)
- **Tire Size:** 29.5-29 28PR (E-3)

### Tractor Engine

- **Displacement:** 891 cu in (14600.91 cu cm)
- **Make:** Caterpillar
- **Net Power:** 330 hp (246.09 kw)
- **Power Measured @:** 1900 rpm

### Transmission

- **Max Speed Forward:** 29.9 mph (48.12 kph)
- **Number Of Forward Gears:** 8

### Weights

- **Front Axel - Loaded:** 63021.4 lbs (28581.13 kg)
- **Front Axle - Empty:** 46612.4 %
- **Rear Axle - Empty:** 19977.2 %
- **Rear Axle - Loaded:** 51564 %
- **Total Operating - Empty:** 66590.7 lbs (30199.86 kg)
- **Total Operating - Loaded:** 114585.3 lbs (51966.12 kg)

## About this model

The Caterpillar 621B is a wheel tractor-scraper used in earthmoving, road construction, and large-scale site preparation. As part of Caterpillar's scraper lineup, the 621B is designed for loading, hauling, and spreading material over medium to long distances. It typically features a single-engine, open bowl configuration with a rear push-pull or push-loading arrangement depending on setup. The machine is used for moving soil, gravel, and other bulk materials efficiently across job sites. The Caterpillar 621B is recognized for its role in high-production grading and mass excavation applications, where scraper performance and cycle efficiency are important.

## Photos

![1981 Caterpillar 621B](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/c895a4f3-0b11-4613-965c-77ec380613a5-hr.jpg)

![1981 Caterpillar 621B photo 2](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/f47f8f1c-572a-4340-91ef-0c3097b2d174-hr.jpg)

![1981 Caterpillar 621B photo 3](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/0d9e848d-29e2-4a10-8e46-77cb01a546dc-hr.jpg)

![1981 Caterpillar 621B photo 4](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/0879303d-3b1c-4de4-899b-fdd4e420ccf1-hr.jpg)

![1981 Caterpillar 621B photo 5](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/cd5981f5-c517-4b02-8fed-f2a7013cc98c-hr.jpg)

![1981 Caterpillar 621B photo 6](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/750c82ae-bdc3-4f02-8278-8748a06b1c58-hr.jpg)

![1981 Caterpillar 621B photo 7](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/f7ece35c-94b1-4bd8-94c5-f99763c83eb7-hr.jpg)

![1981 Caterpillar 621B photo 8](https://www-ironplanet.s3-us-west-2.amazonaws.com/i/22650/308/0fe19aa4-747d-42ea-a53b-7e7880bb3eb4-hr.jpg)