| Source | Target | | torque wrench | llave de torsión |
| tow tractor | tractor de remolque |
| tower crane | grúa torre |
| track | oruga, cadenas |
| track harvester | cosechadora de cadenas, de oruga |
| track loader | cargador de cadenas, cargador de oruga |
| track tractor | tractores de cadenas, tractores de oruga |
| tractor loader backhoe | tractor retrocargadora |
| tractor, tractors | tractor, tractores |
| transfer switch | interruptor de transferencia |
| transformer | transformador |
| trench | trinchera, zanja, excavación |
| trencher | zanjadora |
| trestle | caballete |
| trestle ladder | escalera de caballete |
| trimmer | podadora |
| trowel | paleta, allanadora |
| truck | camión |
| truck, off highway | camión de obra |
| tunnel boring machine | tuneladora |
| u bolt | perno en u |
| u bolt | clip grillete, grapa de perno en "u" |
| u joint/universal joint | junta universal, cardán |
| uncoiler | desenrollador |
| undercharging | subcargado |
| underground | subterráneo |
| underground mining equipment | equipos para minería subterránea |
| underpinned | apuntalado |
| underspeed | baja velocidad |
| universal joint | junta universal, cardán junta universal, cardan |
| unprotected | desprotegido, expuesto, descubierto |
| unprotected side | lado expuesto, lado descubierto |
| unstable | inestable |
| unstable soil | suelo instable, terreno instable |
| upkeep | mantenimiento |
| upper | superior |
| urethane | uretano |
| used | usado |
| used equipment | equipo usado |
| vacuum | vacío |
| vacuum tank | tanque de vacío |
| valve | válvula |
| venturi-mixer | mezclador tipo venturi |
| vertical | vertical |
| vertical grinder | esmeriladora vertical, pulidora vertical |
| vertical lathe | torno vertical |
| vest | chaleco |
| vibratory | vibratorio |
| vibratory compactor | compactador vibratorio |
| vibratory plate compactor | compactador de placa vibratoria |
| voltage | voltaje |
| voltage regulator | regulador de voltaje |
| vulcanized | vulcanizado |
| walkie | caminando, andando, a pie |
| water | agua |
| water tank truck | camión cisterna para agua |
| water wagon | cisterna para agua |
| welding machine | máquina de soldar |
| wheel | rueda |
| wheel dozer | tractor topador de ruedas |
