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
TELCO-TATA 9TD01119/03, POCLAIN-CASE POCLAIN W0033071, DRESSER-FURUKAWA 319325231R1, BENATI 2001074, TELCO-TATA TD01119/03, E.W.K. 501518501, HANOMAG 2979124M, LANDINI MASSEY FERGUSON 3089873M1, CATERPILLAR 5W9827, JCB JNA0295, JCB JNA0362, A.B.G. 21076286, Surub papuc, MAIT 2901221, LANDINI MASSEY FERGUSON 2979939M1, LIEBHERR 4097515, JOHN DEERE-CAMECO CB01419009, CNH-FIAT NEW HOLLAND 79031606, GAMBETTI-BARRE M175903001, JOHN DEERE CQ09337, LIEBHERR 4253410, REEDRILL V005766, JOHN DEERE T121478, SENNEBOGEN 013343, EXTEC VCR1251, C.M.W-(CHARLES-MACHINES) 107-365, DRESSER-FURUKAWA 3193523R1, BERCO CR1251, VARIOUS 571008, CATERPILLAR, 2ZN-1-UP, LANDINI MASSEY FERGUSON 1430746M1, CNH-FIAT NEW HOLLAND 4982171, Incarcator, BERCO CR1251A, ITM D04100A0N15, INGERSOLL RAND 57700866, VOLVO 14016545, 953C, TELCO-TATA 9TD01583/2, INGERSOLL RAND 57407405, MAIT 2175046, CNH-FIAT NEW HOLLAND 79004489, CATERPILLAR 7H3597, LANDINI MASSEY FERGUSON 4906550M1, VOLVO 18065840, LIEBHERR 4157879, INGERSOLL RAND 56965262, TELCO-TATA TD01583/2, JOHN DEERE T43323, VPI V7H3597, VERMEER 118120001, LANDINI MASSEY FERGUSON 2979121M1, HYUNDAI 81EL-25020, VOLVO 16545, LANDINI MASSEY FERGUSON 2928705M1, LIEBHERR 4982171, LIEBHERR 7001485, CATERPILLAR 5H8756, CASE 295318A1, JOHN DEERE T45096, LANDINI MASSEY FERGUSON 2979124M1, DRESSER 1254380H1, LIEBHERR 4091100, SIMIT 45482377
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
C.M.W-(CHARLES-MACHINES) 107-365, A.B.G. 21076286, LIEBHERR 4091100, CATERPILLAR, BENATI 2001074, TELCO-TATA 9TD01583/2, CATERPILLAR 5W9827, JOHN DEERE T43323, EXTEC VCR1251, GAMBETTI-BARRE M175903001, SIMIT 45482377, JOHN DEERE T45096, VERMEER 118120001, CNH-FIAT NEW HOLLAND 79031606, INGERSOLL RAND 57407405, ITM D04100A0N15, MAIT 2175046, VOLVO 18065840, JOHN DEERE T121478, LIEBHERR 4982171, REEDRILL V005766, LIEBHERR 4253410, TELCO-TATA TD01583/2, LANDINI MASSEY FERGUSON 1430746M1, JOHN DEERE-CAMECO CB01419009, TELCO-TATA 9TD01119/03, TELCO-TATA TD01119/03, Incarcator, HANOMAG 2979124M, E.W.K. 501518501, BERCO CR1251, VOLVO 16545, DRESSER 1254380H1, MAIT 2901221, DRESSER-FURUKAWA 319325231R1, LANDINI MASSEY FERGUSON 4906550M1, LIEBHERR 4097515, LIEBHERR 4157879, DRESSER-FURUKAWA 3193523R1, BERCO CR1251A, JOHN DEERE CQ09337, LANDINI MASSEY FERGUSON 2928705M1, JCB JNA0295, CASE 295318A1, LANDINI MASSEY FERGUSON 2979939M1, SENNEBOGEN 013343, INGERSOLL RAND 57700866, LANDINI MASSEY FERGUSON 2979121M1, VOLVO 14016545, 2ZN-1-UP, LIEBHERR 7001485, VPI V7H3597, HYUNDAI 81EL-25020, CATERPILLAR 7H3597, CNH-FIAT NEW HOLLAND 4982171, CNH-FIAT NEW HOLLAND 79004489, LANDINI MASSEY FERGUSON 2979124M1, POCLAIN-CASE POCLAIN W0033071, LANDINI MASSEY FERGUSON 3089873M1, VARIOUS 571008, CATERPILLAR 5H8756, JCB JNA0362, INGERSOLL RAND 56965262, Surub papuc, 953C