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
WIRTGEN 43499, JCB JNA0358, JOHN DEERE CQ09338, EURODAEWOO 9121-6005D11, 953C, Piulita, DAEWOO K1043367, VOLVO 020005225990, DRESSER 260714R1, POCLAIN-CASE POCLAIN V2434592, DAEWOO 9121-6005, CNH-FIAT NEW HOLLAND 79004490, LANDINI MASSEY FERGUSON N1926, JCB JNA0086, POCLAIN-CASE POCLAIN ZKI134536, INGERSOLL RAND 56965270, VOLVO 9112-12001, MECALAC 5230071, TELCO-TATA TD01119/04, VPI V1M1408, HYUNDAI 81EL-25030, E.W.K. 501518401, MAIT 2904108, LANDINI MASSEY FERGUSON 2961659M1, LIEBHERR 7001334, CNH-FIAT NEW HOLLAND 79009851, JOHN DEERE T45097, BERCO CR1250B, TELCO-TATA 9TD01119/04, EXTEC VCR1250, VOLVO 44062, CASE R25688, JCB 200/61801, DRESSER-FURUKAWA 1254381H1, CATERPILLAR 5W9828, VOLVO 044062, TELCO-TATA 9TD01583/3, LIEBHERR 4122664, C.M.W-(CHARLES-MACHINES) 107-364, SENNEBOGEN 3528013331, MAIT 2175047, POCLAIN-CASE POCLAIN K0134536, LANDINI MASSEY FERGUSON 2928706M1, LIEBHERR 7001439, INGERSOLL RAND 57700858, VOLVO SA9112-12001, BENATI 2001075, KOMATSU 131437, CNH-FIAT NEW HOLLAND 579383, DRESSER-FURUKAWA 3150627R1, LIEBHERR 4982173, CATERPILLAR 1M1408, LIEBHERR 4111100, LIEBHERR 4129303, Incarcator, CATERPILLAR, LANDINI MASSEY FERGUSON 2979125M1, LIEBHERR 4174947, STANDARD BBX-1-UP, REEDRILL V005767, LANDINI MASSEY FERGUSON 1430747M1, KOMATSU 00131437, SIMIT 45482379, A.B.G. 21076294, VOLVO 14044062, BENATI 2001015, TELCO-TATA TD01583/3, DRESSER 616209C1, HYUNDAI 81E6-37030, CNH-FIAT NEW HOLLAND 4982173, HANOMAG 2979125M, LIEBHERR 7402313, DRESSER 311347R2, VOLVO 14526392, POCLAIN-CASE POCLAIN PK134536, POCLAIN-CASE POCLAIN P2434592V, ATLAS-TEREX 0362007, LANDINI MASSEY FERGUSON 392826X1, VERMEER 1181230011, BERCO CR1250, JOHN DEERE-CAMECO CB01419006, VARIOUS 571009, SAMSUNG-H.I. 9112-01201, JOHN DEERE T43322, CNH-FIAT NEW HOLLAND 71401387, ITM D01060C0N17, LIEBHERR 4253411, GAMBETTI-BARRE M175903002, DAEWOO 9121-7004, DAEWOO 2121-6014, LARSEN & TOUBRO V20134541
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
VOLVO 044062, DAEWOO 9121-6005, MECALAC 5230071, STANDARD BBX-1-UP, HANOMAG 2979125M, DRESSER 260714R1, JCB 200/61801, LIEBHERR 4174947, 953C, CATERPILLAR 5W9828, CNH-FIAT NEW HOLLAND 579383, Incarcator, VARIOUS 571009, WIRTGEN 43499, LIEBHERR 4129303, TELCO-TATA TD01119/04, TELCO-TATA 9TD01119/04, KOMATSU 00131437, CNH-FIAT NEW HOLLAND 79009851, JCB JNA0358, E.W.K. 501518401, POCLAIN-CASE POCLAIN P2434592V, VOLVO 020005225990, LANDINI MASSEY FERGUSON N1926, CNH-FIAT NEW HOLLAND 71401387, CNH-FIAT NEW HOLLAND 79004490, BENATI 2001015, LIEBHERR 4122664, BERCO CR1250B, LANDINI MASSEY FERGUSON 1430747M1, DAEWOO K1043367, JOHN DEERE CQ09338, INGERSOLL RAND 57700858, LIEBHERR 4111100, GAMBETTI-BARRE M175903002, ITM D01060C0N17, JOHN DEERE T45097, EXTEC VCR1250, TELCO-TATA TD01583/3, BENATI 2001075, Piulita, VPI V1M1408, LIEBHERR 4253411, DAEWOO 2121-6014, SIMIT 45482379, DRESSER 616209C1, ATLAS-TEREX 0362007, LANDINI MASSEY FERGUSON 392826X1, JCB JNA0086, POCLAIN-CASE POCLAIN K0134536, VOLVO SA9112-12001, INGERSOLL RAND 56965270, CNH-FIAT NEW HOLLAND 4982173, SENNEBOGEN 3528013331, VOLVO 14526392, VOLVO 9112-12001, DAEWOO 9121-7004, DRESSER-FURUKAWA 1254381H1, MAIT 2175047, JOHN DEERE T43322, LANDINI MASSEY FERGUSON 2961659M1, JOHN DEERE-CAMECO CB01419006, LANDINI MASSEY FERGUSON 2979125M1, VERMEER 1181230011, POCLAIN-CASE POCLAIN ZKI134536, SAMSUNG-H.I. 9112-01201, HYUNDAI 81EL-25030, MAIT 2904108, TELCO-TATA 9TD01583/3, BERCO CR1250, POCLAIN-CASE POCLAIN V2434592, LANDINI MASSEY FERGUSON 2928706M1, VOLVO 14044062, LARSEN & TOUBRO V20134541, DRESSER-FURUKAWA 3150627R1, LIEBHERR 4982173, CATERPILLAR, A.B.G. 21076294, EURODAEWOO 9121-6005D11, CASE R25688, POCLAIN-CASE POCLAIN PK134536, REEDRILL V005767, LIEBHERR 7402313, C.M.W-(CHARLES-MACHINES) 107-364, DRESSER 311347R2, KOMATSU 131437, HYUNDAI 81E6-37030, LIEBHERR 7001439, LIEBHERR 7001334, CATERPILLAR 1M1408, VOLVO 44062