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Mahr dimensional measuring equipment

Mahr’s service facility opened in January of 1992. We clean, repair and test gear pumps from any manufacturer. All metering pumps received for repair are subjected to a rigorous inspection.

Steps in the typical pump service process:

• Receipt – Our receiving department documents each pump by serial number and customer, and assigns a control number for tracking purposes.
• Pyrolysis – To remove hardened polymer products, pumps are heated in a ‘burn-out’ oven for several hours at up to 900ºF.
• Disassembly – Each pump is kept in its own box, so that parts are never mixed from pump to pump.
• Glass bead blasting – This process removes carbon residue from pyrolysis, without damaging critical dimensions or tolerances of the parts.
• Ultrasonic cleaning – Parts are soaked in a heated, caustic ultrasonic tank, then double-rinsed in clean ultrasonic baths, then dried thoroughly.
• Measurement – Mahr’s own world-renowned measuring equipment is used to check the critical tolerances of all internal parts down to the micrometer.
• Adjustment – Gears and plates are lapped if necessary, then re-cleaned and re-measured.
• Re-assembly – Worn or damaged parts are replaced, and the pump is rebuilt.
• Hydraulic testing – Using test stands made by Mahr, we measure the pump’s flow rate under various outlet pressures to determine possible slippage.
• Hot testing – The pump is heated and torque checked, to ensure ease of rotation at operating temperature.
• Delivery – Pumps are carefully packed and shipped back to the customer.

Mahr hydraulic test stand