Expert Pitch Ram Replacement Services

NGI provides pitch ram replacement services to address failed, leaking, or non-functioning pitch cylinders that impact blade control and turbine operation. Work is executed to safely remove and replace pitch rams while maintaining full control of the blade and ensuring proper integration with the hydraulic pitch system.

Each scope is performed using a structured approach that prioritizes system isolation, controlled component handling, and precise reinstallation. NGI verifies mounting conditions, connection integrity, and hydraulic system performance throughout the process to ensure proper function.

Final testing is completed to confirm smooth pitch movement, stable system response, and overall system readiness. All work is documented to support traceability and ensure the turbine is returned to reliable and safe operation.

Blade Positioning & Mechanical Securing

Blade is positioned to a safe working angle and mechanically secured to prevent unintended movement. Verification of blade stability is completed prior to disconnecting the pitch ram.

System Isolation & Lockout/Tagout

Isolation of the pitch system in accordance with site and OEM procedures.

Hydraulic pressure is relieved, accumulators are discharged as required, and electrical and hydraulic systems are locked out to ensure a zero-energy state prior to work.

Hydraulic System Depressurization

Verification that all hydraulic pressure is fully relieved from the pitch circuit.

Lines are checked for residual pressure prior to disconnection to prevent uncontrolled release.

Disconnection of Hydraulic & Mechanical Interfaces

Removal of hydraulic hoses, fittings, and connections from the pitch ram.

Disconnection of mounting hardware, pins, and linkage points between the ram, hub, and blade interface.

Pitch Ram Removal

Removal of the pitch ram using proper rigging and handling methods to prevent damage to surrounding components. The component is safely lowered or transferred out of the work area.

Mounting Surface & Component Inspection

Inspection of mounting points, pins, bushings, and connection interfaces for wear, elongation, cracking, or damage. Verification that all contact surfaces are clean and suitable for reinstallation.

Pitch Ram Installation & Fit-Up

Installation of the new or refurbished pitch ram, ensuring proper alignment with mounting points and interfaces. Pins, bushings, and hardware are installed and secured according to specification.

Hydraulic Reconnection

Reinstallation of hydraulic lines and fittings, ensuring correct routing, cleanliness, and proper torque. Sealed surfaces are verified to prevent leaks.

System Bleeding & Pressure Restoration

Hydraulic system is bled to remove trapped air and restore proper system pressure.

Verification of stable pressure and proper hydraulic response is completed.

Functional Testing & System Verification

Pitch system is cycled through operation to verify smooth movement, correct response, and proper blade positioning. System is checked for abnormal noise, hesitation, or irregular movement.

Leak Check & Final Inspection

All hydraulic connections and components are inspected for leaks, proper securement, and overall system integrity.

Documentation & Closeout

All work performed, components replaced, and system conditions are documented.

Final status is recorded to support maintenance records and confirm system readiness.

Pitch Ram Replacement