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Preventative Maintenance Checklist

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Implementation of preventive maintenance plan keeps SPX FLOW products running at optimal levels and protects your product investment. Use the below checklist to figure out when it is time for regular product inspections and part replacements using SPX Flow products spares to extend your products lifecycle. 

OIL/LUBRICATION

Check for damaged rear oil

Possible Causes

  • Seal may be old and worn
  • No grease on lips to lubricate
  • Shaft worn under seals
  • Not centered on shaft when installed 

Possible Solutions 

  • Replace seals 
  • Properly lubricate with grease when installing 
  • Inspect shaft surface under seals 

MAINTENANCE FREQUENCY: EVERY 3 MONTHS

OIL/LUBRICATION

Check for Leaks Product

Possible Causes

  • Damaged seals or elastomers

Possible Solutions 

  • Replace seals or elastomers 

MAINTENANCE FREQUENCY: WEEKLY

OIL/LUBRICATION

Check for Leaks-Flush fluid

Possible Causes

  • Damaged seal, fitting or flush tube
  • Damaged flush-side seal components, damaged elastomers

    Possible Solutions 

    • Replace seal, fitting or flush tube 
    • Replace flush-side seal components 
    • Replace elastomers 

        MAINTENANCE FREQUENCY: WEEKLY 

        OIL/LUBRICATION

        Check oil level, for contaminants and for leaks (if applicable)

        Possible Causes

        • Oil leak from gear case cover, oil seal or gear case rear oil seal
        • Loose back cover, Oil plug damaged

        Possible Solutions 

        • Replace oil seals 
        • Check or replace oil plug 

        MAINTENANCE FREQUENCY: WEEKLY

        OIL/LUBRICATION

        Check front grease seals

        Possible Causes

        • Seal may be deteriorated or worn
        • Shaft worn under seals, or no grease on lips to lubricate

        Possible Solutions 

        • Replace seals 
        • Properly lubricate with grease when installing 
        • Inspect shaft surface under seals 

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        OIL/LUBRICATION

        Check for excess grease in clean-out plugs

        Possible Causes

        • Excess grease accumulates with normal operation

        Possible Solutions 

        • Remove excess grease from clean-out plugs 

        MAINTENANCE FREQUENCY: MONTHLY

        When your pump can no longer be repaired, who better to trust for the reconditioning of your pump than the company who originally manufactured it? Plus all remanufactured pumps carry a full factory warranty. This program includes our special 'NO DOWNTIME' feature, supplying you with a replacement pump before returning your old pump.

        ROTORS 

        Check for sharp edged shaft shoulder

        Possible Causes

        • Loose rotor nut(s)
        • Belleville-style washer(s) on backwards
        • Rotors slammed against shoulder when installed
        • Backface clearances not even

        Possible Solutions 

        • Torque rotor nut(s) properly
        • Install Belleville-style washer(s) correctly
        • Remove sharp edge with file to prevent cutting shaft o-ring
        • Verify backface clearances are even

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        ROTORS 

        Check for rotor tip to rotor tip contact or uneven rotor tip to rotor tip clearance

        Possible Causes

        • Hard object jammed into rotors and twisted shafts

        Possible Solutions 

        • Replace shafts 
        • Install strainers if necessary 
        • Check and replace gears if necessary 

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        ROTORS 

        Check for worn rotor hub end or shaft shoulder

        Possible Causes

        • Loose rotor nut(s)
        • Belleville-style washer(s) on backwards
        • Rotors slammed against shoulder when installed

        Possible Solutions 

        • Torque rotor nut(s)
        • Install Belleville-style washer(s) correctly
        • Replace rotors and shafts or shim front bearing(s) to maintain proper backface clearances

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        ROTORS 

        Check for worn/damaged rotor or shaft keyway(s) or key(s)

        Possible Causes

        • Loose rotor nut(s)
        • Belleville-style washer(s) on backwards

        Possible Solutions 

        • Replace rotors, shafts and keys
        • Torque rotor nut(s)
        • Install Belleville-style washer(s) correctly

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        ROTORS 

        Check for rotor tip to rotor hub contact

        Possible Causes

        • Loose rotor nut(s)
        • Belleville-style washer(s) on backwards
        • Back face clearances not even
        • Bearings need replacing

        Possible Solutions 

        • Torque rotor nut(s) properly
        • Install Belleville-style washer(s) correctly
        • Verify backface clearances are even
        • Check and replace bearings

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        Purchase new Universal 3 (U3) pump

        Maintain pump with genuine SPX FLOW parts

        Trade in OLD U3 pump for a NEW U3 pump at a remanufactured price

        GEARS/BEARINGS  

        Inspect for Gear backlash

        Possible Causes

        • Lack of lubrication
        • Excessive hydraulic loads
        • Loose gear locknuts

        Possible Solutions 

        • Check lubrication level and frequency
        • Reduce hydraulic loads
        • Torque locknuts to specified torque valves
        • Check and replace gears if necessary

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        GEARS/BEARINGS

        Inspect bearings, axially or radially movement

        Possible Causes

        • Lack of lubrication
        • Excessive hydraulic loads
        • Product of water contamination

        Possible Solutions 

        • Check lubrication level and frequency
        • Reduce hydraulic loads
        • Ensure no excess grease build-up
        • Replace bearings If necessary

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        GEARS/BEARINGS  

        Inspect for loose gears

        Possible Causes

        • Gear locknuts not tongued properly
        • Locking assembly not torqued properly
        • Worn gear key

        Possible Solutions 

        • Torque gear nut to specified toque value
        • Check and replace gears if necessary
        • Inspect gear keys, shaft keyway and shaft, replace If necessary

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        GEARS/BEARINGS  

        Inspect gears for worn or broken teeth

        Possible Causes

        • Lack of lubrication
        • Excessive hydraulic loads
        • Loose gear locknuts

        Possible Solutions 

        • Check lubrication level and frequency
        • Reduce hydraulic loads
        • Torque lockouts to specified torque valves
        • Check and replace gears if necessary

        MAINTENANCE FREQUENCY: EVERY 3 MONTHS 

        For more information, visit our website:  www.mgnewell.com and www.newellautomation.com.

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