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
RH9, CNH-FIAT NEW HOLLAND 87582723, DRESSER 616226C1, LIEBHERR 4130.246.16, HYUNDAI 81E7-0022, O-&-K-TEREX, ITM D0108000N17, HANOMAG 3254012M1, POCLAIN-CASE POCLAIN E0050018, LARSEN & TOUBRO W20134542, TELCO-TATA 9TD01089/4, O-&-K-TEREX 42452, POCLAIN-CASE POCLAIN V0234504, SENNEBOGEN 018585, POCLAIN-CASE POCLAIN ZKI234504, VOLVO 44064, CATERPILLAR 1S1860, VOLVO 14044064, TELCO-TATA TD01089/4, LIEBHERR 4111000, HANOMAG 2895890M1, VOLVO 140440645, Piulita, Excavator, LIEBHERR 7001688, DRESSER-FURUKAWA 3194591R1, CATERPILLAR 1A4019, BLOUNT 31001809, POCLAIN-CASE POCLAIN V2334504, SENNEBOGEN 2528018585, VARIOUS 571109, CASE R29246, BERCO CR1967, KOMATSU 01803-E0202E, BAUER 49335, CNH-FIAT NEW HOLLAND 76040850, TELCO-TATA TD01120/04, LIEBHERR 7003772, VPI V1S1860, 116200-116599, TESMEC T00-2600-126, INGERSOLL RAND 56969264, REEDRILL V007410
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
TESMEC T00-2600-126, HANOMAG 2895890M1, LARSEN & TOUBRO W20134542, TELCO-TATA TD01120/04, O-&-K-TEREX 42452, VPI V1S1860, POCLAIN-CASE POCLAIN E0050018, LIEBHERR 4111000, CASE R29246, VOLVO 14044064, KOMATSU 01803-E0202E, TELCO-TATA 9TD01089/4, SENNEBOGEN 2528018585, TELCO-TATA TD01089/4, DRESSER-FURUKAWA 3194591R1, LIEBHERR 4130.246.16, Excavator, SENNEBOGEN 018585, BAUER 49335, CATERPILLAR 1A4019, VOLVO 140440645, POCLAIN-CASE POCLAIN V0234504, O-&-K-TEREX, CNH-FIAT NEW HOLLAND 87582723, VOLVO 44064, ITM D0108000N17, HANOMAG 3254012M1, BERCO CR1967, CATERPILLAR 1S1860, VARIOUS 571109, 116200-116599, POCLAIN-CASE POCLAIN ZKI234504, RH9, POCLAIN-CASE POCLAIN V2334504, DRESSER 616226C1, Piulita, REEDRILL V007410, LIEBHERR 7003772, CNH-FIAT NEW HOLLAND 76040850, HYUNDAI 81E7-0022, INGERSOLL RAND 56969264, BLOUNT 31001809, LIEBHERR 7001688