Prochem Everest 408-650, LP-HP - Manual (Page 44)

42
Maintenance
Key Checkpoints
Note: Initiation of a planned preventative maintenance
program will assure that your unit has optimum perfor-
mance, a long operating life, and a minimal amount of
"down" time.
Engine Coolant System (Radiator)
Your engine radiator coolant system is an important
part of the power plant operation. In addition, the heat
exchange system which is used to provide heat for
cleaning operations is also highly dependent on the
engine coolant system. Follow the recommended
coolant system maintenance in the Maintenance
Schedule in this manual and your ZPP416 engine
owner's manual. Refer any additional questions to your
dealer.
External Fuel Pump
The power plant for your unit receives fuel from the
main fuel tank of your van/truck. An external fuel pump
that provides this fuel is located on the underside of the
van/truck. Loose fittings and hose connections will
cause your unit to perform poorly. Follow the recom-
mended fuel pump maintenance in the Maintenance
Schedule in this manual. Refer any additional
questions to your dealer.
Chemical Supply System
The chemical supply system pulls chemicals from your
chemical bottle utilizing a pump that works off the water
pump pulsing. Any clogged filters or loose connections
will result in a chemical supply system malfunction or a
malfunction at the cleaning tool. Maintenance of the
solution outlet check valve and screen are vital to
effective cleaning operation and minimal unit downtime.
Additionally, the hoses related to supplying water and
chemical to the outlet manifold are under high
pressures and experience thermal expansion and
contraction. Periodic inspections of these hoses for
tears, cracks and failing connectors are necessary to
avoid unwanted leaks. To keep your chemical system
functioning properly, follow the chemical pump and
solution outlet maintenance in the Maintenance
Schedule in this manual. Refer any additional
questions to your dealer.
Heat Exchanger System
The heat exchange system in your unit transfers
energy between the heat of the engine exhaust and the
blower discharge air, to the solution supply system.
The heat transfer of this system is highly dependent on
the surface area contact in the heat exchanger cores
located in the heat exchanger box. This surface area
amount is adversely minimized when the supplied
water is not softened to recommended levels. Hard
water will result in scaling on the inside walls of the heat
exchanger tubes. It is recommended that you use a
dealer-approved water softener to avoid premature
heat exchanger core failure. Contact your local dealer
for advice on the water hardness levels in your area.
Additionally, the heat exchanger tubes are very
sensitive to freezing conditions. As the water freezes
during cold conditions, it expands in the heat
exchanger tubes and causes damage. Often the tubes
are cracked and require replacement of the heat
exchanger core. Refer to the Freeze Protection instruc-
tions section in this manual. Refer any additional
questions to your dealer.
Vacuum Pump
The total function of the unit is based around the perfor-
mance of the vacuum pump. Heat transfer used to
raise the temperature of the solution is gained from the
air drawn by the vacuum pump and solution is removed
from the carpet with the vacuum suction of the vacuum
pump. General maintenance actions for the vacuum
pump as listed in this manual are vital to prolonged
vacuum pump operations. Daily lubrication of the
pump is required to avoid seizure of the system. Also,
waste tank filters and pre-filter box strainers must be
maintained to prevent unwanted debris from entering
the vacuum pump.
86352170 EVEREST