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
POCLAIN-CASE POCLAIN E0050018, BAUER 49335, SENNEBOGEN 018585, VPI V1S1860, HANOMAG 3254012M1, POCLAIN-CASE POCLAIN ZKI234504, CASE R29246, VARIOUS 571109, HANOMAG 2895890M1, O-&-K-TEREX 42452, CATERPILLAR 1S1860, TELCO-TATA 9TD01089/4, TELCO-TATA TD01120/04, TESMEC T00-2600-126, SENNEBOGEN 2528018585, LIEBHERR 4111000, 4NS-1-UP, VOLVO 44064, 527, KOMATSU 01803-E0202E, POCLAIN-CASE POCLAIN V0234504, CATERPILLAR 1A4019, LIEBHERR 7001688, POCLAIN-CASE POCLAIN V2334504, ITM D0108000N17, REEDRILL V007410, LARSEN & TOUBRO W20134542, CNH-FIAT NEW HOLLAND 87582723, LIEBHERR 4130.246.16, CATERPILLAR, INGERSOLL RAND 56969264, CNH-FIAT NEW HOLLAND 76040850, VOLVO 14044064, BLOUNT 31001809, DRESSER 616226C1, Buldozer, LIEBHERR 7003772, DRESSER-FURUKAWA 3194591R1, TELCO-TATA TD01089/4, Piulita, VOLVO 140440645, HYUNDAI 81E7-0022, BERCO CR1967
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
VARIOUS 571109, TELCO-TATA TD01120/04, O-&-K-TEREX 42452, SENNEBOGEN 018585, KOMATSU 01803-E0202E, POCLAIN-CASE POCLAIN E0050018, HANOMAG 3254012M1, LIEBHERR 7001688, BAUER 49335, HANOMAG 2895890M1, CNH-FIAT NEW HOLLAND 87582723, SENNEBOGEN 2528018585, DRESSER 616226C1, CNH-FIAT NEW HOLLAND 76040850, LIEBHERR 4111000, LIEBHERR 4130.246.16, HYUNDAI 81E7-0022, VOLVO 14044064, BLOUNT 31001809, VOLVO 140440645, ITM D0108000N17, LARSEN & TOUBRO W20134542, Piulita, TELCO-TATA TD01089/4, CATERPILLAR 1A4019, CATERPILLAR, REEDRILL V007410, Buldozer, POCLAIN-CASE POCLAIN V2334504, 4NS-1-UP, POCLAIN-CASE POCLAIN V0234504, VOLVO 44064, INGERSOLL RAND 56969264, TESMEC T00-2600-126, VPI V1S1860, CATERPILLAR 1S1860, BERCO CR1967, 527, LIEBHERR 7003772, TELCO-TATA 9TD01089/4, POCLAIN-CASE POCLAIN ZKI234504, DRESSER-FURUKAWA 3194591R1, CASE R29246