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reason to shut down the fluid cooler until the problem can be located and cor-
rected. Observe operation of the motor, coupling (or drive shaft), Geareducer,
(if equipped) and fan. Become familiar with the normal operating temperature
of the motor(s), as well as the sight and sound of all components as a whole.
If equipped, check Geareducer oil level. Shut down the unit and allow 5 min-
utes for the oil level to stabilize. Add oil if required. Check for Geareducer oil
leaks. Check the Geareducer as well as any optional oil lines to external oil
dipstick/sight glass.
Inspect louvers, drift eliminators and basin trash screens and remove any
debris or scale which may have accumulated. Replace any damaged or worn
out components. Use of high-pressure water may damage the eliminator and
louver material.
Observe operation of the float valve. Depress the operating lever to make
sure that the valve is operating freely. Inspect the suction screen for plugging.
Remove any debris that may have accumulated.
Check for any buildup of silt on the floor of the collection basin. Mentally make
note of the amount, if any, so future inspections will enable you to determine
the rate at which it is forming.
If equipped with dampers, lubricate the pivot points of the individual blades.
Observe the area where the steel pivot pins penetrate the assembly’s outer
frame. The pin should rotate freely in the frame. In locations with severe hard
water supply or climate, apply grease to the pivot points and linkage. This will
both lubricate and seal out oxygen and moisture from the pivot points and
help prevent hard water scale build-up.
Every 3 months:
If equipped, lubricate fan shaft bearings. While rotating
equipment by hand, grease the bearings until a bead forms around the seals—
a maximum charge of 1 ml (MHF705) and 42 ml (MHF7111-MHF7113) is
recommended. Models MHF7103 - MHF7107 have a grease fitting on each
bearing housing with a maximum recommended charge of 15 ml per fitting.
Chevron SRI-2 grease (or equivalent lithium-based grease) is recommended.
Semi-Annually:
If equipped, check the belt tension and condition.
If equipped with dampers, lubricate jack shaft bearings and tie bar linkage with
silicone lubricant. If dampers are equipped with pneumatic or electric actua-
tors, the manufacturer's recommended maintenance procedures should be
observed. If dampers are exposed to heavy dust-laden air, occasional flushing
of the bearings with water is recommended.
maintenance