Equipment Specs

Caterpillar 225 Hydraulic Excavator

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Caterpillar Hydraulic Excavators
Equipment Specifications - RitchieSpecs
Free specifications for all classes of equipment
Caterpillar 225
Caterpillar 225
Caterpillar 225 interior
The Caterpillar 225 hydraulic excavator was introduced in 1972 in the USA. Production began in Belgium in 1974 and Brazil in 1976.

[edit] Features

The 225 has two different engine configurations: the American units have a Cat 3208 engine while the Belgian and Brazilian units have a Cat 3304 turbo engine. Both configurations produce 125 flywheel horsepower (FWHP). It comes standard with a variable flow hydraulic system.

The 225 was manufactured in the USA, with a 51U or 61X serial number prefix; in Belgium, with a 76U prefix; and in Brazil, with a 20S prefix.

The 51U and 76U have pilot-operated controls. The 20S has hydrostatic drive and oil disc brakes.


In 1973 Caterpillar added an optional long undercarriage and two-piece boom, beginning with 51U00590.

In 1976 a track guiding guard was made standard, beginning with 76U00821. The engine speed was increased to 2,000 revolutions per minute, beginning with 76U00880.

Production of 20S ended in 1977.

In 1977 a new cab design was introduced, beginning with 76U01200 and 51U02034.

In 1978 Cat increased the horsepower to 135 FWHP, added D5-size track components, and modified the boom, beginning with 76U01317 and 51U02832. At the same time the 51U unit received a two-pump hydraulic system.

In 1984 the cab was modified, beginning with 51U05268 and 61X00441.

Production of 61X ended in 1985

In 1985 a 235 carbody and D6C-size undercarriage was added, beginning with 76U05033. Modifications were made to the line relief valve, beginning with 51U05900. The hydraulic horsepower was increased, beginning with 76U05159 and 51U06006. At the same time, the 76U unit received larger track roller shafts. New swing and travel motors were introduced, beginning with 76U05505 and 51U06171. At the same time the 76U unit received new implement pumps. New track rollers were added, beginning with 51U06255. Cat added new hydraulic pumps and motors, beginning with 51U06258. An orifice swing cushion was added, beginning with 76U05684 and 51U06319.

In 1986 Caterpillar added a sound-suppressed cab, beginning with 76U06317.

Production ended in the USA in 1986 and Belgium in 1987.

The 225 was replaced by the Caterpillar 225B.

Based on data from the sales database of Ritchie Bros. Auctioneers, it is estimated that more than 15,600 Caterpillar 225 hydraulic excavators have been produced.

Highest Serial #
76U 06384
20S 02114
51U 06720
61X 00390
Total = 15,608