Prochem Legend GT - Manual (Page 40)

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Maintenance
Key Checkpoints
NOTE: Initiation of a planned preventative
maintenance program will assure that your unit has
optimum performance, a long operating life, and a
minimal amount of "down" time.
External Fuel Pump Maintenance
The power plant for the 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 recommended
fuel pump maintenance in the Maintenance Schedule
in this manual. Refer any additional questions to your
dealer.
Chemical Supply System Maintenance
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 Maintenance
The heat exchange system in your unit transfers
energy from the engine’s exhaust and 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 manufacturer 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 the replacement of the heat
exchanger core. Refer to the Freeze Protection instruc-
tions section in this manual. Refer any additional
questions to your dealer.
86313050 LEGEND GT