539 Knuckleboom Loader Caterpillar

The operator sound exposure Leq (equivalent sound pressure level) measured according to the work cycle procedures specified in "ANSI/SAE J1166May90" is 81.55 dB(A), for the cab offered by Caterpillar, when properly installed, maintained and tested with the doors and windows closed.

The operator sound pressure level measured according to the procedures specified in "SAE J919Jun86" is 78.5 dB(A), for the cab offered by Caterpillar, when properly installed, maintained and tested with the doors and windows closed and with the machine at high idle with all cab fans off.

The exterior sound pressure level for the standard machine measured at a distance of 15 m (49.2 ft) according to the test procedures specified in "SAE J88Jun86", with the machine at high idle is 78.1 dB(A).

Vibration Level

The hands and arms are exposed to a weighted root mean square acceleration that is less than 1.1 m/sec².

The whole body is exposed to a weighted root mean square acceleration that is less than 0.2 m/s².

Measurements are obtained on a representative machine using the procedures in the following standards:

• "SAE J88"

• "SAE J1166"