20
when 110°C (230°F) may be reached.
• If operating at high speeds or with hot
liquids, the surface of the pump can
become hot.
4.2 DAILY CHECKS
• Visual checks of all seals for signs of
leakage of product, flushing liquid (if used)
and oil from the gearbox.
• Check the Packed gland seal for excessive
leakage (if used)
• Listen for any unusual noises
• Check for any vibration or temperature
changes.
• If minor problems are identified these
should be rectified at the end of the shift
and if major they should be attended to at
once.
4.3 WEEKLY CHECKS
• As Daily Checks.
• Remove the end cover of the pump and
inspect for signs of damage or wear.
Repair or replace if necessary.
• If the main product shaft seals are of the
packed gland type, inspect them for signs
of wear. Replace or plan for replacement
as necessary.
• Check the lubrication level and top up if
necessary. This must be done with the
pump stopped.
• Check lubrication level on drive unit and
top up as necessary. Follow the
manufacturer's instructions.
4.4 MONTHLY CHECKS
• As Weekly Checks.
• Remove the end cover and inspect the
surfaces.
• Visually check the rotor surfaces.
• If an end cover relief valve is fitted check
its function. If the relief valve is not
operating on a regular basis the
diaphragm may have a tendency to stick.
4.5 SIX MONTHLY CHECKS
• As Monthly Checks.
• Change the end cover O-ring or end cover
gasket.
• Remove the rotors for visual inspection
and signs of wear.
• Inspect the seal faces for wear and the
condition of the elastomers. Replace if
necessary or note for planned
maintenance.
4.6 ANNUAL CHECKS
• Change the mechanical seals if fitted, and
if required.
• Replace the lip seal on the mechanical
seal flush housings.
• Replace the end cover relief valve
diaphragm.
• Change the packing rings on the packed
gland type shaft seals.
• Change all L-cups, O-rings and/or gaskets
on pump head.
• Inspect gearbox oil seals and gear cover
gasket for signs of leakage and replace if
necessary.
• Check bearing wear by seeing if there is
any movement of the shaft side to side or
forwards and backwards. If movement is
perceived remove the gear cover and
dismantle the bearings for inspection,
replace if necessary.
• Drain and change the oil in the pump
gearbox.
By ensuring a visual inspection daily and regular
checks at planned intervals, pumps can be
maintained to maximum performance for many
years.
Failure to maintain the pump by carrying
out the above checks may invalidate
warranty.
5 CLEANING AND
STERILISATION
HP & LH pumps are designed for use with
products that require the process equipment and
pumps to be cleaned. The standard (level) of
cleaning or sanitization required depends on the
needs of the process and product. This
information is provided for guidance only. It is the
responsibility of the pump user to make sure that
the cleaning protocol chosen is adequate to
achieve the desired levels of cleanliness and JEC
cannot accept any responsibility for contamination
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