Vac unit
Also on the tools
Vac units
Servicing and repairs for vacuum excavation trucks and trailers — blowers, vacuum pumps, debris tanks and water systems — done on site across the North Island.
Vac units — repairs & servicing
North Island · Mobile mechanic
HDD drill rig
repairs.
Directional drilling · On site
Servicing, breakdown repairs and rebuilds for horizontal directional drilling rigs — done on your site, anywhere in the North Island, by a mechanic who specialises in them.
- On-site repairs
- All North Island
- After-hours call-outs
What we fix
Keep the rig
boring.
HDD rigs are Diarmuid's core speciality. From the rotation head to the mud pump, every system gets a proper diagnosis and a practical repair plan.
Request a serviceRotation & carriage
Gearboxes, rotation motors, carriage rollers and wear pads checked, adjusted and rebuilt.
Rod loaders & vices
Rod handling, vice jaws, wrenches and make-up / break-out faults sorted on site.
Drilling fluid pumps
Mud pumps, valves, seals and plumbing kept pumping at full pressure.
Engines & electrics
Diesel servicing, sensors, controls and fault codes — the real cause, not just the symptom.
Scheduled servicing
Servicing planned around rig hours and your job schedule, so the rig doesn't stop mid-bore.
Breakdowns mid-bore
Rig down with rods in the ground? Send the location and a photo or video and get help fast. Send it on WhatsApp
Makes & areas
Any make.
Anywhere north.
Diarmuid comes to you with a fully kitted service truck. No need to move the machine to a workshop.
Makes we work on
Experienced with the makes most common on New Zealand sites. Not on the list? Send the make and model and you'll get a straight answer.
Where we work
The whole North Island — including Whangārei, Auckland, Hamilton, Tauranga, Rotorua, Taupō, New Plymouth, Napier, Hastings, Palmerston North and Wellington.
Good to know
Common
questions.
Anything else? Ask Diarmuid directly — you always deal with the person working on your machine.
HDD rig
Do you come out to the drilling site?
Yes. Shamrock is a mobile service — Diarmuid comes to your site with a fully kitted service truck, anywhere in the North Island, so the rig doesn't need to be moved to a workshop.
Can you help if the rig breaks down in the middle of a bore?
Yes. Send a WhatsApp with the location, the machine and a photo or video of the fault. Breakdowns are prioritised and after-hours call-outs are available.
What makes of HDD rig do you work on?
All the common makes used in New Zealand, including Vermeer, Ditch Witch and American Augers. If you're not sure, send the make and model and you'll get a straight answer.
Do you offer planned servicing for drilling contractors?
Yes. Diarmuid can set up scheduled servicing based on machine hours for one rig or a whole fleet, with a service note for your records after every job.
What else we work on
One specialist.
Four machines.
Many crews run more than one type of machine. One mechanic can look after them all.
Trencher
Also on the tools
Trenchers
Chain trenchers set up to cut clean, straight and on depth — servicing and repairs done on your site, anywhere in the North Island.
Trenchers — repairs & servicingExcavator
Also on the tools
Excavators
Excavators serviced and repaired right where they work — from mini diggers to larger crawler excavators, anywhere in the North Island.
Excavators — repairs & servicingOther heavy plant?
Ask about your machine
Shredders, loaders, telehandlers and other civil plant too — if it runs on diesel and hydraulics, Diarmuid can take a look.
Start a conversation
Rig down?
Let's get to work.
Tell Diarmuid what machine it is, where it is and what happened. Photos of the fault help a lot.
Chat on WhatsAppFastest way to reach us
Phone021 060 0185
HoursMon–Fri 7am–5pmAfter-hours call-outs available
Emaildcooney@shamrockmechanicalsolutions.com
Service areaAll of the North Island, NZ
Fleet or civil contractor?
Ask about planned servicing for multiple machines or a field-support arrangement for your crews. Email a company enquiry →
Request a service or quote
Fill this in and it opens WhatsApp with your message ready to send.