Pump and Fluid Systems
Chapter 5: Assembly/Disassembly
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MP-16 2-Piece 5000 psi January 2013
4.4.2
Biweekly Maintenance Checklist
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Flush the fluid in the cradle drain lines.
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Drain the water condensate from the frame by removing one of the lower ½” cap screws
on the clean out cover.
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Check the valves and seats for wear, and replace any cut or worn inserts.
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Check the bushing in the valve stem guide and replace if visibly worn.
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Check over the piston/crosshead coupling for loose or damaged components, and correct
the torque values as necessary.
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Ensure that the piston hub seal is properly mounted on the piston rod, correctly placed in
the piston hub groove and has not been altered or damaged.
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Check the piston rod lock nut, and replace if it has been damaged or corroded, or if the
locking nylon has lost its ability to effectively grip the threads. Any nut which has been
used three (3) times should be replaced.
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Check over all guards, shields and other safety systems, ensuring that they are properly
locked into position and in working order.
4.4.3
Monthly Maintenance Checklist
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Check over all tools used to work on the pump, ensuring that they are in good working
order and readily available.
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If a strainer cross is used, ensure it contains a strainer sleeve. Clean the sleeve and
check for damage or corrosion.
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Check all of the studs and nuts on the fluid cylinder for tightness, including the valve
cover bolt on the rings, those affixing the fluid end blocks to the frame studs, those
affixing the discharge to the suction studs and the liner retention flange.
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Inspect the power end for gaskets which leak excessively or loose cap screws, and
replace as required.
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Check all of the bolting on the fluid and power ends of the pump, and make sure all are
tight and secure.
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Remove both clean out covers and drain contaminated oil from settling chamber. Then
replace covers and add oil to compensate for the amount drained out.
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Check the crosshead extension rods for wear and tear, and repair or replace as needed.
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Clean the liner wash pump strainer and the strainer in the strainer cross.
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Clean out the crankcase breather, replace as needed.
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Check all valves, seats and springs for wear and tear to ensure they are in good working
order. Replace as needed.
