Haigh Quattro Vanguard Enhanced, Manual

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5. Maintenance and servicing procedures
Routine maintenance
WARNING: Maintenance of a Quattro should only be carried out by a qualified person.
Electrically isolate the machine before undertaking any routine maintenance.
Industrial gloves must be worn when working on or rotating the impeller by hand
Daily
•
Run the machine under “no load” conditions to clear any residue.
Monthly
•
Lid spray- remove any scale and replace.
•
Check that the lid micro-switch and solenoid latch operate.
•
Check for leakage from the pulveriser and water pump seals.
Quarterly
Water supply and drainage
•
Check for leakage from the pulveriser or water pump seals.
•
Check for leaks cold water supply pipe-work.
•
Check that the machine is draining correctly.
•
Check that the drain block pressure switch tube is clear of water.
•
Check and clean solenoid filter or replace.
Mechanical
•
Check wear on the hopper cutter ring/impeller.
•
Check that the impeller is rotating freely and for absence of vibration.
•
Inspect and tighten nuts and bolts as necessary.
•
Check the condition of the lid/hopper seal, and that the lid opening gas spring operates correctly.
•
Check the lid latch arrangement. Turn isolator off during an empty cycle to simulate a power loss and
ensure that the solenoid has secured the latch in the locked position.
Electrical
•
Check contactor is operating correctly in control gear.
•
Check overload units operating and set correctly.
•
Check lid positive break interlock switch operates correctly.
•
Check electrical connections in control gear and motor terminal box are secure.
•
Low water sensor and drain/hopper block pressure switch operate
•
Functionally test the machine.