When the Power End Breaks Down, the Pump Cannot Deliver
NNG evaluates pump power ends, identifies mechanical wear and damage, and helps restore dependable operation through repair, rebuilding, exchange or replacement.
- Mechanical Inspection
- Repair or Exchange Options
- High-Pressure Pump Support
POWER END INSPECTION | COMPLETE REBUILDS | CRANKSHAFT & CONNECTING-ROD SERVICE | BEARING REPLACEMENT | PRECISION MACHINING | EXCHANGE OPTIONS
Power End Repair, Rebuild & Exchange Services
The power end converts rotational input into the reciprocating motion that drives the pump. Wear or damage in the crankshaft, bearings, connecting rods, crossheads and related components can lead to noise, vibration, heat, reduced performance and complete pump failure. NNG Industries provides inspection, repair, rebuilding, machining, exchange and replacement support for power ends used in reciprocating, plunger and high-pressure pump systems. The goal is to evaluate the complete mechanical assembly and determine the most practical service path based on its condition, service history, replacement availability and operating requirements.
Power End Inspection & Evaluation
Disassembly and inspection support for internal wear, mechanical damage, bearing condition, alignment concerns and lubrication-related issues.
Power End Repair
Repair support for qualifying power ends with localized wear, damaged components or declining mechanical performance.
Complete Power End Rebuilding
Rebuilding support involving disassembly, cleaning, component replacement, machining, reassembly and testing where applicable.
Crankshaft, Journal & Shaft Service
Inspection, machining and restoration support for worn crankshafts, journals, shafts and related rotating components.
Bearing & Internal Component Replacement
Replacement and sourcing support for bearings, bushings, seals, connecting components and other internal wear parts.
Exchange & Replacement Options
Exchange-unit evaluation and replacement sourcing when repair is not practical or turnaround requirements favor another path.
Receive → Disassemble → Inspect → Approve → Rebuild or Exchange → Test
Power End Problems Require a Complete Mechanical Evaluation
Noise, heat or vibration may point to a failed bearing, but the underlying cause may involve journal wear, misalignment, lubrication failure, damaged crossheads or connecting components. NNG evaluates the condition of the complete assembly so the service recommendation reflects the actual mechanical failure rather than only the most obvious symptom.
Restore reliable mechanical power before the damage spreads.
Repair decisions based on the complete power end assembly.
Power End Assemblies We Service
NNG supports power ends and related mechanical components used across reciprocating, plunger and high-pressure pump applications. Service availability depends on the manufacturer, configuration, material, condition, technical information and replacement-part availability.
Support for Current and Legacy Equipment
NNG may assist with older or difficult-to-source power ends when repairable components, drawings, dimensional information or qualified replacement options remain available.
Project Evaluation
Depending on the request, NNG may review pump information, power end model, operating speed, load, lubrication history, failure symptoms, maintenance records and previous repair history.
Power End Assemblies
- Reciprocating pump power end
- Plunger pump power ends
- High-pressure pump power ends
- Triplex pump power ends
- Quintuplex pump power ends
- Specialty pump drive assemblies
Internal Components
- Crankshafts
- Connecting rods
- Crossheads
- Bearings
- Bushings
- Gears
- Shafts
- Seals
Areas Evaluated
- Bearing journals
- Crankshaft surfaces
- Crosshead guides
- Connecting components
- Housings and bores
- Gear and drive components
- Lubrication-related wear
- Mounting and alignment surfaces
The Right Path...
The right option depends on the condition of the power end, internal damage, repair history, replacement availability and operating requirements.
Repair
Correct localized mechanical wear or component damage when the assembly remains suitable for continued service.
Rebuild
Restore the power end through disassembly, cleaning, component replacement, machining, reassembly and testing.
Exchange
Replace
Source a new, rebuilt, used, OEM or qualified replacement assembly when repair is not practical.
POWER END SERVICE QUESTIONS
What Customers Need to Know
Answers to common questions about evaluation, testing, exchange availability and what to send with a service request.
What information should I provide?
Send the pump and power end manufacturer, model, serial number, configuration, operating symptoms, photos, service history and required timing.
What power end problems can NNG evaluate?
NNG may evaluate noise, vibration, overheating, bearing failure, journal wear, damaged connecting components, lubrication-related damage and reduced mechanical performance.
Does NNG perform complete power end rebuilds?
Complete rebuilding may be available depending on the unit, condition, parts availability and required repair scope.
Can NNG repair a crankshaft or damaged journal?
Machining or restoration may be possible depending on the material, dimensions, wear, damage and operating requirements.
Are exchange power ends available?
Exchange availability depends on the manufacturer, model, configuration and current inventory. Core-return requirements may apply.
Can NNG support obsolete power ends?
Support may be possible when the assembly can be identified, measured, repaired or matched to a qualified replacement.
What testing is performed after repair?
Testing may include rotational checks, dimensional inspection, clearance verification, lubrication-system review and functional testing appropriate to the completed work.
Does NNG also service the fluid end?
NNG provides separate repair, rebuilding, exchange and replacement support for qualifying fluid ends. Link directly to the Fluid End Repair & Exchange page.
Need Power End Repair or Exchange Support?
Send the pump and power end information, operating symptoms, photos, service history and required timing. NNG will review the request and help identify the most practical repair, rebuilding, exchange or replacement path.