MX Pumps Troubleshooting
- Symptom1 - Motor will not run.
- Symptom2 - Pump runs but hasexcessive pulsation.
- Symptom3 - Leak from rod sealpackings.
- Symptom4 - Low materialflowrate, pumprunning fast or willnot stall (stalling - 1stroke should notoccur in less than 30seconds)
- Symptom5 - Air entrainment in a pump.
Symptom1 - Motor will not run.
Possible Cause
- No Air supply.
- Air piston seal worn.
- Pilot valve assembliesinoperable.
- Main air valve inoperable.
- QE valve defective.
Remedy
- Check air and fluid supply ball valves andsupply hoses.
- Replace Piston seal.
- Switch/interchange pilot valves to isolatefaulty pilot valve and clean/replace.
- Check clean/replace Air valve.
- Check for constant exhaust air when pumpis not in a stalled condition. Check/replaceQE cups.
Symptom2 - Pump runs but hasexcessive pulsation.
Possible Cause
- Worn piston seal.
- Worn/failed shaft seals.
- Damaged exhaust valve.
- Damaged pilot valve.
- Air exhaust restricted.
Remedy
- Replace piston seal.
- Replace shaft bearing / seal housing.
- Inspect / clean and replace as required.
- Inspect / clean and replace as required.
- Inspect / clean and replace as required.
Symptom3 - Leak from rod sealpackings.
Possible Cause
- Seal wear or damage topacking material.
- Damaged rod
Remedy
- Stop the pump and relieve all materialpressure. Tighten the gland nut until theresistance of the packings clamping the shaftcan be felt. Do not over-tighten. Ensure solventcup has the correct lubricant for the materialbeing pumped present at all times.
- Replace rod.
Symptom4 - Low materialflowrate, pumprunning fast or willnot stall (stalling - 1stroke should notoccur in less than 30seconds).
Possible Cause
- Contaminates trappedbetween ball and seat.
- Worn or damaged balls/seats.
- Worn bottom rod seals.
Remedy
- Strip and clean pump. Check for damage.
- Check for wear; replace balls and / or seats.
- Replace rod seals.
Symptom5 - Air entrainment in a pump.
Possible Cause
Loose joint on suction side.
Remedy
Check and reseal fittings.
