DEF Tank 410 L 108.3 gal 30 L 7.9 gal 25 L 6.6 gal 8L 2.1 gal 8L 2.1 gal 20 L 5.3 gal Sound Performance ISO 6395 (External) 100 dB(A) ISO 6396 (Inside Cab) 68 dB(A) • When properly installed and maintained, the cab offered by Caterpillar, when tested with doors and windows closed according