In timp ce modelele standard ale Seriei 3 beneficiază de o transmisie hidrostatică cu două viteze, care permite utilajelor să se deplaseze cu viteze cuprinse între 0-20 km/h, noul 121E HTS, împreună cu alte două modele mai mari, utilizează o unitate hidrostatică cu două trepte în combinaţie
HYUNDAI 81E6-2003-30, JCB 210/71800, KOMATSU ALL MAKES ZZYR0071, LARSEN & TOUBRO F20342309, POCLAIN-CASE POCLAIN J0242336, CASE S233033, LIEBHERR 5209288, CATERPILLAR 6K9879, LIEBHERR 5009090, INGERSOLL RAND 56800113, LARSEN & TOUBRO M20242357, CATERPILLAR 3K7962, HYUNDAI 81E6-2003BG, POCLAIN-CASE POCLAIN W0942307, LARSEN & TOUBRO L20242357, BANTAM-KOEHRING 3018.43232, POCLAIN-CASE POCLAIN ZKI1642327, POCLAIN-CASE POCLAIN N1642327, POCLAIN-CASE POCLAIN W0942330, ITM C0104100M00, JOHN DEERE-CAMECO CB01418829, ATLAS-TEREX, RICHIER 508562503, Rola de sustinere, HYUNDAI 81E6-2003, KOMATSU UTILITY 820210009, ATLAS-TEREX 322009, INGERSOLL RAND 57695637, BERCO CR2880, HYUNDAI 81E6-17030, SAMSUNG-H.I. 1081-01670, LALTESI 68305, RICHIER 508513527, CATERPILLAR 6K9880, LIEBHERR 5003855, SCHAEFF 5382660371, Excavator, 1404HDS, VPI VCR2880V, LIEBHERR 5601364, C.M.W-(CHARLES-MACHINES) 337-196
Utilajul de constructii a fost testat pe santiere aflate la o altitudine mare si in lucrari realizate la temperaturi scazute. Astfel, cumparatorii buldozerului Komatsu D65-17 sunt convinsi ca utilajul va respecta norma Tier 4 in orice imprejurare. Puterea motorului acestui buldozer Komatsu variaza intre 208 si 222
LIEBHERR 5009090, HYUNDAI 81E6-2003, POCLAIN-CASE POCLAIN W0942330, POCLAIN-CASE POCLAIN ZKI1642327, KOMATSU UTILITY 820210009, RICHIER 508513527, JOHN DEERE-CAMECO CB01418829, SCHAEFF 5382660371, LARSEN & TOUBRO M20242357, SAMSUNG-H.I. 1081-01670, CATERPILLAR 3K7962, HYUNDAI 81E6-2003BG, LIEBHERR 5601364, POCLAIN-CASE POCLAIN W0942307, BERCO CR2880, VPI VCR2880V, RICHIER 508562503, Excavator, LARSEN & TOUBRO F20342309, POCLAIN-CASE POCLAIN J0242336, Rola de sustinere, POCLAIN-CASE POCLAIN N1642327, KOMATSU ALL MAKES ZZYR0071, HYUNDAI 81E6-2003-30, HYUNDAI 81E6-17030, BANTAM-KOEHRING 3018.43232, 1404HDS, CASE S233033, JCB 210/71800, CATERPILLAR 6K9879, CATERPILLAR 6K9880, LIEBHERR 5209288, INGERSOLL RAND 57695637, ATLAS-TEREX 322009, ATLAS-TEREX, ITM C0104100M00, LARSEN & TOUBRO L20242357, LIEBHERR 5003855, INGERSOLL RAND 56800113, C.M.W-(CHARLES-MACHINES) 337-196, LALTESI 68305