One Stop Diesel Shop
879 Factory Road - Te Awamutu, Waipa

Bring your heavy duty diesel vehicles to the truck mechanics at Harty Mechanical in Te Awamutu


Need repairs now? Is your fleet due for servicing? Engine had it? Bring your vehicle or machinery to Harty Mechanical - the only diesel-exclusive mechanic in Te Awamutu. The experienced diesel engine mechanics at Harty Mechanical work on all sizes and classes of trucks and trailers plus diggers, loaders, bulldozers, large motorhomes and farm equipment. 

All work is carried out in our purpose-built workshop but if you're stuck and need a tow, Harty Mechanical will organise a pick up for you. If needs-be we also have mobile mechanics who can carry out work at your location. Most parts are carried on-site with speciality parts ordered in from Hamilton firm TRT or further afield if necessary.

Book your vehicle in for prompt reliable service from expert diesel truck mechanics.

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Reliable and affordable mechanical services by Te Awamutu's only diesel-exclusive truck mechanic

  • Over 40 years of combined diesel mechanic experience.
  • Full fleet servicing and COF checks and repairs.
  • Thorough diagnostic testing on your truck computer control units.
Conveniently located in Te Awamutu, servicing Waipa and greater Waikato

Your one stop shop for diesel mechanical services and engine reconditioning

Like any good mechanic workshop, Harty Mechanical is well equipped to carry out:

  • Full fleet servicing of diesel vehicles and heavy machinery
  • Total rebuilds and reconditioning of any type of diesel engine
  • Diagnostic tests on all computer automated control units using an advanced scan tool called Jaltest
  • Certificate of Fitness (COF) checks, repairs and sign off
  • Instead of pits, all heavy duty trucks are hoisted using hydraulic column lifters. Any new or specialist parts not available on-site are ordered in and installed, with your prior consent

Need specific welds or joints engineered? Harty Mechanical's certified welder can take care of your engineering needs including welding and steel fabrication.

Full diesel mechanical servicing to keep your vehicles running smoothly


All diesel machinery booked in receives a thorough service with additional checks and tests given to vehicles with high kms on the odometer. The same standard applies when you book in your single vehicle or fleet for an on-site service.

  • Grease vehicle and check drive line. 
  • Jack up front axle(s). Check wheel bearings and grease kingpins. 
  • Check all shackles, pins and bushes.
  • Take weight off rear suspension trunnion and grease.
  • Check rear suspension for wear. 
  • General chassis check and brake adjustment if necessary.
  • Check all fluid levels - including all potential oil leaks. 
  • Check condition of all springs and report. 
  • Check and adjust clutch if necessary. Lube bearings and cross shaft. 
  • Check fan belt, make necessary adjustments and condition.
  • Check all coolant hoses and radiator condition.
  • Check air cleaner restriction indicator.
  • Check fuel water separator and drain if required.
  • Check battery water level and terminal condition. 
  • Check all lights, electrical fittings and wipers.
  • Check tyres for damage, wear, and match.
  • Check brakes, make any adjustments and fix all leaks in brake hoses.

Everything in A service, plus: 
  • Change engine oil and filters.
  • Change all fuel filters.
  • Remove all fuel water separator and clean filter gauze.
  • Check all belt tensions, adjust spring and bearing.
  • Check idler pulley bearings where fitted.
  • Check radiator additive level and record reading percentage.
  • Check air induction system.

Everything in B service plus:
  • Change gearbox oil and filter.
  • Change diff oils and filter.
  • Retorque manifold bolts. 
  • Change power steering oil and filter. 
  • Dismantle and service air drier if fitted. 
  • *Replace air cleaner elements as required.
  • *Carry out top tune. 
  • *Change coolant.
*Check first

Has an error code reading stopped all movement? Run a diagnostic test with Harty Mechanical and get back on the road or farm in no time

Fast diagnosis is the key to getting your machinery in working order again. Harty Mechanical has invested in Jaltest for this job - an advanced technology electronic diagnostic scan tool that connects easily to all heavy duty, registered, diesel vehicles including trucks, motorhomes, trailers, vans, agricultural and special vehicles. 

The system quickly and efficiently troubleshoots faults, describing them in full detail. It also guides needed repairs, identifies additional parts required and produces in-depth reports for your business compliance needs.

With Harty's skilled truck mechanics on task, your vehicle/s will be back on the road performing in top condition before you know it.

One Stop Diesel Shop
879 Factory Road, Te Awamutu, Waipa