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
CNH-FIAT NEW HOLLAND 79012421, PR721, ITM D04700A0N17, O-&-K-TEREX 0038240, ATLAS-TEREX 0359762, JOHN DEERE T126932, LIEBHERR, DRESSER-FURUKAWA 3031169R1, KOMATSU UTILITY 820510441, HANOMAG 2928578M1, Buldozer, EXTEC VCR1968, POCLAIN-CASE POCLAIN W2434593, HANOMAG 2971208M1, CASE R57375, BERCO IN1319, CASE R43173, POCLAIN-CASE POCLAIN ZKI134514, FUCHS 3600986022, LANDINI MASSEY FERGUSON 1421302M1, CATERPILLAR 5W4022, DRESSER 616200C1, WIRTGEN 37825, LIEBHERR 4202014, BERCO CR1968, DRESSER 261968R1, LANDINI MASSEY FERGUSON 3031169R3, POCLAIN-CASE POCLAIN L0134514, LIEBHERR 4129300, CASE R17415, BAUER 10097, SENNEBOGEN 3528017650, VOLVO 020005226035, POCLAIN-CASE POCLAIN W2534593, HYUNDAI 81E6-2054, DEUTZ 2361577, RICHIER 508562901, CNH-FIAT NEW HOLLAND 573905, POCLAIN-CASE POCLAIN L134514, Piulita, VOLVO 14016546, HANOMAG 2971208M, VPI V7K2017, HANOMAG 1444855X1
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
FUCHS 3600986022, CASE R57375, Buldozer, POCLAIN-CASE POCLAIN L134514, HANOMAG 2971208M1, EXTEC VCR1968, ITM D04700A0N17, BERCO IN1319, CATERPILLAR 5W4022, CNH-FIAT NEW HOLLAND 79012421, HANOMAG 2971208M, CASE R17415, ATLAS-TEREX 0359762, BAUER 10097, Piulita, RICHIER 508562901, JOHN DEERE T126932, DEUTZ 2361577, DRESSER 616200C1, POCLAIN-CASE POCLAIN W2534593, POCLAIN-CASE POCLAIN W2434593, HANOMAG 1444855X1, LANDINI MASSEY FERGUSON 1421302M1, PR721, POCLAIN-CASE POCLAIN L0134514, LANDINI MASSEY FERGUSON 3031169R3, VOLVO 14016546, VOLVO 020005226035, SENNEBOGEN 3528017650, WIRTGEN 37825, BERCO CR1968, DRESSER-FURUKAWA 3031169R1, CASE R43173, CNH-FIAT NEW HOLLAND 573905, LIEBHERR 4202014, LIEBHERR, KOMATSU UTILITY 820510441, DRESSER 261968R1, LIEBHERR 4129300, HYUNDAI 81E6-2054, POCLAIN-CASE POCLAIN ZKI134514, O-&-K-TEREX 0038240, HANOMAG 2928578M1, VPI V7K2017