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DIESEL INJECTION SPECIALISTS

Diesel Pump Repair Specialists — Fast, Accurate, Local in Auckland

Restore power, reliability and fuel efficiency with precision diesel pump diagnostics, rebuilds and calibration. Simms Diesel services fleets, workshops, marine, agricultural and industrial engines across Auckland and Northland.

Book A Repair

Call 09 579 1159
Thanks for contacting us. We'll get back to you as soon as possible.

Request a Diesel Pump Quote

✅ Typical response time: Same business day.

Established Diesel Experts

Trusted diesel injection specialists serving Auckland and Northland for decades. 

Advanced Calibration & Testing

Specialist bench testing and calibration equipment ensures every pump is rebuilt and set to specification.

Fleet & Commercial Focused

We understand downtime costs money. Our structured repair process keeps your trucks and machinery moving.

Quality Parts & Workmanship

We use quality components and verify every repair through testing before it leaves our workshop.

COMMON SYMPTOMS

Losing Power? 
Burning More Fuel Than Usual?

Diesel pump faults often appear as starting issues, excessive smoke, low power or inconsistent performance under load. If you're experiencing any of the following, a proper bench test can identify the root cause before unnecessary parts are replaced.

Common signs your diesel pump may need inspection:

Hard start / no start (even with good fuel supply)

Loss of power, poor throttle response.

Excessive smoke (black / white) under load.

Rough idle, surging, or intermittent cut-outs.

Poor fuel economy and increased operating cost.

HOW IT WORKS

Our Diesel Pump Repair Process

We run a structured workflow so you get clear answers, accurate repairs, and 
consistent outcomes — without guesswork.

1

Diagnose & Bench Test

We inspect and test to confirm the fault before any repair work begins.

2

Rebuild & Repair

Precision strip-down, component replacement, and internal restoration where required.

3

Calibrate & Verify

Final calibration and validation testing to ensure performance meets specification.

Request A Quote

Call Workshop

COVERAGE

What We Service

Built for diesel across industries — if it runs on diesel, we can likely help.

Heavy Trucks & Fleet Vehicles

Downtime costs money. We provide accurate diagnostics and dependable diesel pump repairs to keep commercial fleets operating without unnecessary delays.

Agricultural Machinery

Built for peak season performance. We service diesel systems in tractors, harvesters and farm equipment to maintain consistent fuel delivery under load.

Marine Diesel Engines

Reliable performance offshore and inshore. We diagnose and repair marine diesel injection systems for dependable power on the water.

Construction & Heavy Plant

Fuel systems built for high-load cycles. We repair and calibrate diesel pumps in excavators, loaders and plant equipment with precision.

Industrial & Stationary Engines

Generators and stationary engines require consistent fuel delivery. We ensure accurate calibration and reliable performance testing.

Light Commercial & Utes

Work vehicles need dependable power. We restore diesel performance in utes, vans and light commercial engines to reduce fuel burn and improve response.

CUSTOMER REVIEW

Trusted by Fleet Operators Across Auckland

“Professional service and quick turnaround. Our pump issue was diagnosed properly and repaired to spec — truck runs like new.”

Mike P. – Fleet Manager, Transport Company, Auckland
Thanks for contacting us. We'll get back to you as soon as possible.

Request a Diesel Pump Assessment

Tell us your engine, pump type and symptoms — we’ll recommend the most cost-effective solution based on proper testing.

✅ Typical response time: Same business day.

✔ No-obligation assessment

✔ Experienced diesel technicians

✔ Auckland workshop support

FAQ

Diesel Pump Repair – What You Need to Know

Clear answers to common questions about diesel pump diagnostics, repair, exchange options and workshop turnaround.

How long does diesel pump repair take?

Most diesel pump repairs are completed within 2–4 working days, depending on pump type, parts availability and testing requirements. We confirm timing after bench diagnosis.

Can I courier my pump in?

Yes — courier-in repairs are common. Pack the pump securely and include your contact details along with notes describing the symptoms or performance issues.

Do you offer exchange pump options?

In some cases, exchange units are available if repair is not cost-effective. After inspection and testing, we’ll recommend the best-value solution.

Where is your workshop?

You’re welcome to visit our Auckland workshop and showroom at:

77 Leonard Road, Penrose, Auckland 1060
 
We also support courier repairs nationwide.
 

Do you diagnose before repairing?

Yes. Every pump is bench-tested to confirm faults before any repair work begins. This ensures accurate diagnosis and prevents unnecessary part replacement.

What brands do you service?

We service a wide range of diesel injection systems. Contact us with your pump or engine details and we’ll confirm compatibility.

Our Services

Comprehensive diesel system repair and testing — all handled in-house by experienced specialists.

PUMP REPAIR

CAT REPAIR

TURBO REPAIR

DIAGNOSIS

DPF CLEANING

INJECTOR REPAIR