621H Wheel Tractor-Scraper Caterpillar

Illustration 1	g02329835
Approximate dimensions are shown. Dimensions will vary depending on the configuration and the options. (A) 3.68 m (12 ft 1 inch) (B) 4.03 m (13 ft 3 inch) (C) 13.34 m (43 ft 9 inch) (C) 14 m (45 ft 11 inch) with push block extension (if equipped)

Intended Use

This Wheel Tractor-Scraper is an earthmoving machine as described in ISO 6165:2006 and is classified as a scraper. This machine is used to cut, load, transport, and discharge material through a forward motion.

Application/Configuration Restrictions

• Push-pull operation is only allowed between two machines. Using more than two machines will cause damage to components such as the hitch, hitch pins, and other push-pull components.

• Push-pull shall only be conducted with machine models from the same family. For example, a 621H and 621G is allowed, but not a 621H and 657G.

• Push-pull operation shall be conducted so that only one machine is being pushed at a time or only one machine is being pulled at a time.

• Push-pull operation shall be conducted when both machines are operating in a straight line, otherwise damage can occur to the machine.

• Auger machines and elevated scrapers shall not be push loaded.

The operator station is ROPS certified to a tractor only mass of 18800 kg (41447 lb) as tractor portion of tractor-scrapers per Table 1 of ISO 3471:2008. This excludes scraper weight and this weight excludes payload.

For the maximum approved operating weight refer to the loaded weight in Operation and Maintenance Manual, "Rated Load".

Maximum side grade operation without machine articulation is 50% grade.

Note: The listed restriction assumes a machine operating perpendicular to a side grade, graded ground surface, nominal payload, homogeneous payload distribution in the bowl and operating on a dry, firm under footing. Refer to the Operation and Maintenance Manual, "Slope Operation" for more information.

Maximum side grade operation with machine articulation is 22% grade.

Note: The listed restriction assumes a machine operating at a slow ground speed on a graded ground surface, nominal payload, homogeneous payload distribution in the bowl and operating on a dry, firm under footing. Refer to the Operation and Maintenance Manual, "Slope Operation" for more information.

Service brake holding capability on a grade is 25% grade.

Note: The listed restriction assumes that the brake components are within working specifications, a graded ground surface, and a dry, firm under footing. Evaluate the condition of the machine and the environment and use appropriate judgment to maintain control of the machine.

Parking brake holding capability on a grade is 15% grade.

Note: The listed restriction assumes that the brake components are within working specifications, a graded ground surface, and a dry, firm under footing. Evaluate the condition of the machine and the environment and use appropriate judgment to maintain control of the machine.

While descending on a grade do not exceed 2600 RPM or damage to the engine may occur.

Use only in nonexplosive gas environments.