Instruction Manual
Page 35 of 40 Issue: 2.1
N:\Engineering\Manuals\Pump Unit E2-30 & 40 R2.1.doc
Maintenance – Section 6.3 – Gearbox / Motor
Wait until the unit has cooled sufficiently after stopping and isolation.
Gearbox
Oil Plugs / Ventilator
Remove the ventilator plug prior to removing level and/or drain plug.
The gearbox is supplied factory fitted with (see chapter 1.3) oil, only ‘top up’ with the same
type of oil and never overfill as this may cause overheating and leakage. Check the ventilator
is clean and fitted correctly.
If changing the oil place a suitable container underneath the plug for draining.
Note: It is recommended that the oil should be warm (40-50º C) to facilitate easier draining.
After filling with fresh oil refit the ventilator, level and/or drain plugs and clean up any oil
spillage.
Lubrication
Check the oil level every 3,000 hours or 6 months top up as necessary.
Replace gearbox oil every year as per ATEX regulations.
If Synthetic oil is used (USA Gearbox) the recommendation is to replace the oil every 3 years
Never mix different oil types.
Electric Motors
Maintenance of Ex Motors - are reported by EN 60079-17 standard, in particular:-
-The electric connections must be correctly locked to avoid resistance-increases, with
consequent contact overheating.
- The insulation air-distance and the surface-distance between conductors, required by the
standards, must be respected.
- All the screws, used to assemble the parts of the motors and of the terminal box, must be
completely tightened.
- The replacement of seals and of components for cable entrance would be made using
spare parts, supplied from the manufacturer, in order to guarantee the original type of
protection.
- The Ex joint surfaces have not to be machined and it is not allowed to insert, between them,
any kind of seals, not foreseen or supplied from the manufacturer. The join surfaces have
just to be cleaned and, in order to avoid corrosion or water entrance.
Repair procedures of the Ex motors - are reported by IEC 79-19 standard.
When it is not possible to make the repairs of Ex motors at the manufacturer’s plant, the
outside workshops, deputed to this task, must be endowed by the necessary capability,
including:
- Sufficient technical knowledge of these motors.
- Factory equipment with tooling and facilities, suitable to make repairs.
- Quality control department, for the checks and the tests, requested after repairs.
- For the Ex motors the repairs of parts, directly involved on the protection against the
explosion risk, must be done without any modification to the original motor design.
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