Description

Komatsu HST Controller Repair – D51EX-22 & D51PX-22 Professional Services

Autolectronix provides industry-leading Komatsu HST Controller Repair services for the D51EX-22 and D51PX-22 bulldozer models. The Hydrostatic Transmission (HST) controller is critical for smooth steering, hydraulic management and power delivery in Komatsu earthmoving equipment. When the controller fails, operators experience loss of power, sluggish movement, warning alarms, and in some cases complete machine shutdown.

Instead of purchasing an expensive replacement unit, our Komatsu HST Controller Repair service restores your controller to OEM operating standards, saving downtime and significantly reducing costs.

⭐ Why Choose Autolectronix for Komatsu HST Controller Repair?

✔ Expert Technicians

Our technicians specialise in Komatsu hydrostatic transmission controllers, performing component-level repairs using advanced diagnostic tools. Every controller is tested under simulated load conditions before it leaves our workshop.

✔ Fast Turnaround (3–5 Days)

We understand how costly downtime can be. Most Komatsu HST Controller Repair jobs are completed in 3–5 business days, depending on the extent of internal damage.

✔ Cost-Effective Repairs – Only R8,500 (Ex VAT)

A new HST controller can be extremely expensive. Repairing the unit provides substantial savings without compromising quality.

✔ Warranty for Peace of Mind

All repairs include a 3-month warranty, with extended warranties available on selected repairs.

🔧 Common Komatsu HST Controller Problems We Repair

Failures in the HST controller commonly cause performance loss in Komatsu tracked machines. We repair the following issues:

🔹 Communication Errors

Loss of communication between ECU, HST controller and machine control systems can cause:

• Warning alarms

• Loss of power

• No-drive conditions

🔹 Power Supply Faults

Many controllers suffer from:

• Blown power tracks

• Voltage regulator failures

• Unstable 5V references

🔹 Corrosion / Water Damage

Moisture entering the controller leads to:

• Corroded PCB tracks

• Faulty connectors

• Internal shorts

🔹 Component Failures

We replace:

• ICs

• MOSFETs

• Capacitors

• Drivers

• Corroded plugs

• Voltage regulators

Each unit is refurbished to meet Komatsu factory standards.

🚜 Supported Komatsu Models for HST Controller Repair

Our service covers the following hydrostatic Komatsu machines:

• D51EX-22

• D51PX-22

If your machine uses a similar HST controller, contact our team to confirm compatibility.

🧰 Our Komatsu HST Controller Repair Process

1️⃣ Diagnostic Evaluation

We perform a full bench diagnostic including:

• Power testing

• CAN communication verification

• Load simulation

• Oscilloscope analysis of control signals

2️⃣ Component-Level Repairs

We repair internal failures using automotive-grade components:

• Replacing ICs, power stages and regulators

• Repairing PCB tracks

• Restoring corroded or burnt areas

3️⃣ Functional Testing

The repaired controller undergoes:

• Power stability testing

• CAN communication checks

• Load simulation

• Thermal stress checks

4️⃣ Final Quality Control

Every controller is resealed and prepared for installation, ensuring long-term durability.

📦 How to Send Your Komatsu HST Controller for Repair

Package your unit securely and send it to:

Autolectronix
Unit 4 Lubex House
4 Ivy Road
New Germany
KwaZulu-Natal, 3610
South Africa

Include:
✔ Machine model and serial number
✔ Fault description
✔ Your contact details

📞 Contact Autolectronix

📧 sales@autolectronix.co.za
📞 +27 31 700 1420
🌍 www.autolectronix.co.za

Autolectronix — South Africa’s trusted specialist for Komatsu HST Controller Repair.