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Knowledge base

Engineering Insights

Practical guides for NZ heavy transport operators, farmers and contractors. Written by the team at Cole Engineering, Netherton.

Fabrication

Custom Trailer Builds in NZ: What to Know Before You Commission One

Tipping, flat-deck or stock trailer — how to spec a custom build that lasts, what affects the price, and the compliance steps that catch operators out.

May 2026 · 7 min read Read article →
Heavy Transport

5 Signs Your Truck Drawbar or Drawbeam Needs Attention

Drawbar and drawbeam wear rarely fails all at once — it warns you first. The cracks, movement and rust to catch before a COF inspection or a roadside failure.

May 2026 · 6 min read Read article →
Local Area

Engineering Services for Thames, Paeroa, Ngatea, Waihi and the Hauraki Plains

LT400 certified heavy vehicle work, hydraulic repairs and mobile engineering across the Hauraki region — driving times, what we cover and how to reach us.

Jan 2026 · 6 min read Read article →
Heavy Transport

LT400 Certification NZ: What Every Heavy Vehicle Operator Needs to Know

The complete guide to NZTA heavy vehicle specialist certification — what it covers, when it's legally required, who can certify it, and what happens if you skip it.

Jan 2025 · 6 min read Read article →
Maintenance

Hydraulic Hose Maintenance for Farm Machinery: A Practical NZ Guide

Warning signs, pre-season inspection checklist and when to call a mobile engineer. Prevent costly breakdowns before they happen.

Feb 2025 · 7 min read Read article →
Mobile Engineering

Mobile Engineering vs Workshop: When to Call Each for Rural Machinery Repairs

Not every job suits an on-site repair — and not every job needs a workshop visit. A practical guide for Hauraki Plains farmers and contractors.

Mar 2025 · 5 min read Read article →
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