Details

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A cooling tower gearbox operates in one of the most punishing M&E environments in Kuala Lumpur and Selangor: a constant 100% humidity "rain zone" filled with corrosive water treatment chemicals. Over time, moisture ingress contaminates the oil, leading to "pitting" on gear teeth and bearing race failure.

EKG M&E Sdn Bhd provides precision gearbox overhauls to restore the mechanical torque efficiency of your heat rejection system, preventing catastrophic fan failure and Chiller plant downtime.

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1. The Engineering of a Gearbox Overhaul

We don't just change the oil; we perform a structural and mechanical restoration of the drive train.

A. Failure Analysis & Internal Inspection

Before dismantling, we perform a Vibration Spectrum Analysis. This tells us if the noise is coming from the "Input Shaft" (high speed) or the "Output Shaft" (low speed).

• Gear Teeth Inspection: We check for "spalling" or "pitting" on the spiral bevel or helical gears. If the "Backlash" (the gap between teeth) is too wide, the fan will "clunk" during start-up, sending shockwaves through the tower's FRP casing.

B. Precision Bearing & Seal Replacement

Moisture is the primary enemy.

• The Solution: We replace all internal bearings with high-load, matched sets.

• The Seal Upgrade: We install Inpro/Seals or specialized triple-lip viton seals to create a "labyrinth" that physically prevents cooling tower water from entering the oil reservoir, even during heavy Malaysian monsoon storms.

C. Laser Alignment & Balancing

A refurbished gearbox is only as good as its alignment with the motor.

• Laser Shaft Alignment: We use laser tools to ensure the motor shaft and gearbox input shaft are perfectly co-linear. Even a $0.5\text{ mm}$ offset creates "Cyclic Loading" that will destroy new bearings within 6 months.

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2. Lubrication & VFD Integration

As an HVAC and Clean Air Specialist, we optimize the gearbox for the tropical duty cycle:

• Synthetic Lubrication: We utilize high-viscosity synthetic oils with "Extreme Pressure" (EP) additives. These maintain their film strength even when the gearbox is sitting in the 40°C+ ambient heat of a KL rooftop.

• VFD Soft-Start Logic: We recalibrate your Variable Frequency Drive (VFD) to include a 30-second "Ramp-up" time. This prevents the "Torsional Shock" of a hard start, protecting the gear teeth from snapping under the massive inertia of the fan blades.

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3. Gearbox Health Matrix

Symptom	Probable Cause	EKG M&E Rectification
Grinding / Droning Noise	Bearing Race Fatigue.	Full Bearing Set Replacement.
Oil "Milky" Appearance	Water Ingress / Seal Leak.	Oil Flush & Triple-Lip Seal Install.
Heavy Vibration	Misalignment / Gear Pitting.	Laser Alignment & Gear Refurbishment.
High Operating Temp	Low Oil / Excessive Friction.	Oil Level Sensor & Synthetic Upgrade.

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Why Choose EKG M&E Sdn Bhd?

• No-Load Run Testing: Every overhauled gearbox is bench-tested at our facility to monitor temperature and noise levels before being re-installed on your roof.

• Structural Support Check: We inspect the gearbox mounting beams for "Base Softness" and rust, ensuring the restored unit sits on a perfectly rigid platform.

• Strategic Support: Based in Kuala Lumpur, we provide turnkey removals, overhauls, and 24/7 emergency support for commercial buildings and industrial plants.