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The new four-drum, padfoot Cat 825K compactor

incorporates Caterpillar’s Machine Drive

Power (MDP) system—an exclusive feature

that enables operators to consistently at-

tain compaction specifications with mini-

mal passes This results in low operating

costs by saving time, fuel, rework ex-

pense, and machine hours.

Adding available technology for mapping and for stor-

ing and analyzing data creates an intelligent compaction

system that provides comprehensive project management.

Along with compaction intelligence, the 825K has the

weight and power to take on

the most difficult compact-

ing and dozing chores, fea-

turing massive structures for

long-term durability and an

operator’s environment that

ensures optimum comfort,

safety, and productivity.

Power train and


With a maximum operating

weight of 78,326 pounds

(35 528 kg), the 825K de-

velops 405 net horsepower (302 kW) from its Cat C15

ACERT engine.

The C15 ACERT is available with emissions-control

technology to meet either US EPA Tier 4Final/EU Stage IV

for higher regulated countries or US EPA Tier 3/EU Stage

IIIA equivalent emission standards for lesser regulated


An Engine-Idle-Shutdown system conserves fuel by

stopping the engine after a pre-set interval of idling, and a

Delayed Engine Shutdown feature protects the engine by

stabilizing operating temperatures before shutdown.

The drive train uses a 3F/3R Cat power-shift transmis-

sion featuring Single Clutch Speed Shifting, which assists in

maintaining torque flow

through the transmission

during gear changes, re-

sulting in smoother shifts

and minimal power inter-

ruption—especially ben-

eficial on uphill grades.

An integral lock-up

torque converter pro-

vides direct-drive effi-

ciency, speed, and fuel

savings, while also sig-

nificantly reducing drive-

train heat. Additionally,

an auto-shift system allows the machine to automatically

upshift or downshift based on machine speed and torque,

optimizing performance and thus saving fuel. This feature

can be easily enabled or disabled on the soft keypad.

Compaction with confidence

Caterpillar’s MDP system measures the soil’s load-

bearing strength to assess compaction. The system—

which works efficiently with single- or four-drum

New Cat 825K


. . .available in North

America, South

America, Africa,

Middle East and Asia

Pacific regions.

Page 43

Contractors World International Vol 5 No 5

What’s New In Plant & Equipment