Quantcast Operating Valves and Fixtures - mo1180259

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Evidence of leakage, slippage of hose fittings, and damage to outer hose covering sufficient to
expose reinforcement or distortion or bulging of hose body are cause for replacement of the hose
and fitting assembly or the sealing element of a flexible coupling. Check hose and fitting
assemblies for proper identification and replacement date.
12.2.3.8 Storage and Discharge Tanks. Examine the discharge tank for corrosion and leaks.
Note whether the tank is covered to prevent entrance of foreign material and is suitably vented to
the atmosphere. For electro-hydraulic parking lifts, determine whether there is sufficient liquid
remaining in the tank when the lift is at the highest point of its travel to cover the intake and to
prevent cavitation. Means should be provided for indicating the permissible minimum liquid
level for equipment.
12.2.3.9 Operating Valves and Fixtures. Ensure that all operating valves and fixtures are
operating in their intended manner and that all fastenings are in place and secure.
12.2.3.10 Equipment Location. Pump and control equipment access should be unobstructed by
building construction or debris. Access space should be clean and free. Minimum 18" clearance
on three sides of unit.
12.2.4 Controls
The following inspection procedure applies to all the control mechanisms, including starting
panels for the power unit drive motor. A good preventive maintenance program on the control
equipment will greatly reduce shutdowns.
12.2.4.1 Inspection Made with Power Off. Open the mainline switch and examine all relays,
switches, contactors, control circuit rectifiers, transformers, capacitors, etc. Check for
excessively worn or burned contacts, broken connectors, broken or cracked resistance grids or
resistance tubes. Any fuses which are shorted with wire, solder or metal strips must be replaced.
Check whether contacts of reverse-phase relay, where provided, are open. Examine to see that it
is clean. Any accumulation of combustible materials especially on resistance grids or wires, or
on control circuit rectifiers, is a common cause of fire. Also look for excessively worn pin
hinges on relays or contactors.
12.2.4.2 Inspections Made with Power On. Close the mainline switch and proceed to observe
the operation of the control equipment when the power unit is running. Note any arcing of
contacts, excessive heating of coils or resistances, and misalignment of relays, contactors, and
switches.
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