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Periodic Maintenance: CMP-632
Daily Maintenance
- Clean and lubricate exposed pump rods.
- Remove and clean any material residue or film with compatible solvent (damp pad only - do not pour solvent)
- Fill lube chambers with compatible materials (petrolatum grease, for example).
- If leakage appears at rear rod seal, tighten and refill lube chamber. If leak continues, the pump should be rebuilt and inspected for wear or damage (NOTE: Some material film on shaft is normal).
- Check that air supply and air filter are clean, and drain moisture separator.
- Ratio Check Test
- Remove the retainer cap or mixer nozzle.
- Trigger applicator; two separate beads of material will appear; compare for correct volume.
Weekly Maintenance
- Seal/Pump Check Test
- Turn air pressure to 20-25 psi.
- Place a waste container or drop cloth under the purge valve (ball valve below gauge) and open the valve opposite the pump To be checked. EXAMPLE: to check "A" open "B".
- Disconnect the air line, (black or clear 5/32" tube) coming from the unidirectional (gray) valve, at the tube fitting on the 4-way valve the tube connects to. Plug or pinch off the tube. This will prevent the automatic dispense valve from opening. This air line should be marked for later reference.
- Trigger or actuate the unit and slowly turn the pressure up until the drive bar moves out and stalls against pressure (pressure gauge on "A" side should read 300-500 psi; "B" gauge should read "0" psi).
- If it stalls and pressure registers, the pressure seal is good. If not and it takes a long cycle or an additional cycle, there is either air trapped in the pressure tube, the pressure seal is bad, or material is not being supplied.
- Release signal; cylinder will move back and pressure should hold on gauge. If pressure drops, outlet check valve is failing. Rebuild or replace the check valve.
- Repeat sequence on other side closing "B" and opening "A" valve. This will check other side.
- Check Pump Phasing: To "Phase" your system, simply watch the outlet gauges while dispensing material with the static mixer attached. Phasing is correct when both pressure gauges start to rise at the same time
during the dispense stroke. Adjust the pump connecting rods in or out
slightly to ensure that this occurs. Please note:
- The actual gauge pressures may differ due to material properties
- Excessive rod adjustment probably indicates air entrapment in one side of the pump or a malfunctioning component (pressure seal or check valve).
- The coupling between the (black) drive bar and the pump connecting rods has 2 large washers on either side of the drive bar. At least one of these washers must remain loose enough to spin, this will allow rods to float and not side load the seals. The entire coupling can be rotated on the pump connecting rod to adjust phasing.
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