Weir SPM QWS 2500 XL, Operation Instruction And Service Manual, Page: 43 / 44

43 of 44
Document P/N: 2P137414
Release Date: 05/29/2017
Revision: IR
TROUBLE SYMPTOM: PROBABLE CAUSE:
G.) Plunger and/or packing fluid leak. 1. Packing nut not tightened properly.
2. Worn or damaged packing.
3. Packing installed improperly.
4. Mating seal surface not cleaned properly prior to packing
installation.
5. Damaged or corroded mating seal surface.
7. Fluid being pumped is incompatible with the style packing
being used.
8. Wiper ring damaged or installed improperly.
H.) Fluid knock or hammer. 1. Air entering supercharge system through loose, worn or
damaged connections.
2. Air entering supercharge system through leaking charge
pump seals.
3. Fluid being pumped contains gas or vapor.
4. Insufficient supercharge flow or pressure.
5 Valve cocked open/broken valve spring or valve stop.
6. Worn or damaged valve, valve insert, or valve seat.
7. Improperly charged or ineffective suction pulsation
dampener.
I.) Low discharge pressure/rough
running pump. 1. Worn or damaged valve, assemblies.
2. Insufficient supercharge flow or pressure.
3. Air, gas, or vapor in fluid being pumped.
4. Improperly charged or ineffective suction pulsation
dampener.
5. Two or more plunger pumps being supercharged by a
common charge pump and getting “in phase” with each
other.
6. Pump has not been primed properly.