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 4091100, LANDINI MASSEY FERGUSON 3089873M1, VARIOUS 571008, CNH-FIAT NEW HOLLAND 4982171, VERMEER 118120001, LANDINI MASSEY FERGUSON 2979939M1, LANDINI MASSEY FERGUSON 2928705M1, CATERPILLAR 7H3597, BENATI 2001074, CASE 295318A1, POCLAIN-CASE POCLAIN W0033071, VOLVO 14016545, LANDINI MASSEY FERGUSON 1430746M1, LANDINI MASSEY FERGUSON 4906550M1, TELCO-TATA TD01583/2, MAIT 2901221, Surub papuc, SIMIT 45482377, TELCO-TATA TD01119/03, INGERSOLL RAND 57700866, CNH-FIAT NEW HOLLAND 79031606, REEDRILL V005766, DRESSER-FURUKAWA 319325231R1, BERCO CR1251A, JOHN DEERE T45096, JCB JNA0295, VOLVO 18065840, INGERSOLL RAND 57407405, JOHN DEERE CQ09337, SENNEBOGEN 013343, DRESSER 1254380H1, LIEBHERR 7001485, JOHN DEERE T43323, ITM D04100A0N15, DRESSER-FURUKAWA 3193523R1, FIAT-HITACHI, EXTEC VCR1251, LANDINI MASSEY FERGUSON 2979121M1, BERCO CR1251, INGERSOLL RAND 56965262, CATERPILLAR 5H8756, Excavator, LIEBHERR 4982171, VPI V7H3597, CATERPILLAR 5W9827, VOLVO 16545, E.W.K. 501518501, LIEBHERR 4097515, CNH-FIAT NEW HOLLAND 79004489, C.M.W-(CHARLES-MACHINES) 107-365, JOHN DEERE T121478, HANOMAG 2979124M, TELCO-TATA 9TD01583/2, LANDINI MASSEY FERGUSON 2979124M1, JCB JNA0362, LIEBHERR 4253410, A.B.G. 21076286, JOHN DEERE-CAMECO CB01419009, FE18, LIEBHERR 4157879, GAMBETTI-BARRE M175903001, MAIT 2175046, TELCO-TATA 9TD01119/03, HYUNDAI 81EL-25020
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
LANDINI MASSEY FERGUSON 2979124M1, VARIOUS 571008, LIEBHERR 4253410, CASE 295318A1, VOLVO 16545, DRESSER 1254380H1, TELCO-TATA 9TD01583/2, LANDINI MASSEY FERGUSON 3089873M1, JOHN DEERE CQ09337, E.W.K. 501518501, Excavator, FIAT-HITACHI, LIEBHERR 4982171, BERCO CR1251A, MAIT 2175046, FE18, CATERPILLAR 5H8756, POCLAIN-CASE POCLAIN W0033071, EXTEC VCR1251, TELCO-TATA 9TD01119/03, VOLVO 14016545, LANDINI MASSEY FERGUSON 2979121M1, JOHN DEERE T43323, LANDINI MASSEY FERGUSON 2928705M1, C.M.W-(CHARLES-MACHINES) 107-365, INGERSOLL RAND 57407405, JOHN DEERE T121478, ITM D04100A0N15, GAMBETTI-BARRE M175903001, DRESSER-FURUKAWA 319325231R1, INGERSOLL RAND 57700866, JOHN DEERE-CAMECO CB01419009, CATERPILLAR 7H3597, VPI V7H3597, LANDINI MASSEY FERGUSON 2979939M1, A.B.G. 21076286, BERCO CR1251, JCB JNA0362, MAIT 2901221, JOHN DEERE T45096, TELCO-TATA TD01119/03, SIMIT 45482377, LIEBHERR 4157879, LANDINI MASSEY FERGUSON 1430746M1, VOLVO 18065840, VERMEER 118120001, REEDRILL V005766, HYUNDAI 81EL-25020, BENATI 2001074, LANDINI MASSEY FERGUSON 4906550M1, INGERSOLL RAND 56965262, Surub papuc, SENNEBOGEN 013343, LIEBHERR 4097515, LIEBHERR 7001485, HANOMAG 2979124M, CNH-FIAT NEW HOLLAND 79031606, CNH-FIAT NEW HOLLAND 4982171, CATERPILLAR 5W9827, LIEBHERR 4091100, CNH-FIAT NEW HOLLAND 79004489, JCB JNA0295, TELCO-TATA TD01583/2, DRESSER-FURUKAWA 3193523R1