HydraMaster Boxxer 423s, Owner'S Manual, Page: 13 / 92

1-15: General Information General Information: 1-14
HIGH ALTITUDE OPERATION
Elevation plays a key role in how the truckmount will operate. Operation at high altitude
(above 5,000 ft [1,524 m]) may require a high-altitude carburetor jet. Use of this jet at high
altitude will improve power, reduce fuel consumption and help reduce excessive carbon
build-up in the exhaust and heat exchanger systems.
Contact the local Briggs and Stratton dealer or HydraMaster to obtain
the proper jet size. Find your local Briggs and Stratton dealer at
http://www.vanguardengines.com/where-to-buy/dealer-locator/
LOCAL WATER PRECAUTIONS
The quality of water varies greatly. Many areas have an excess of minerals in the water
which results in what is commonly called “hard water.” These minerals tend to adhere to
the insides of heater coils and other parts of the machines causing damage and a loss of
cleaning effectiveness. This influences the reliability and efficiency of equipment in direct
proportion to the level of hardness.
Hard Water Advisory
HydraMaster recognizes that any hard water deposits which might occur within the water
system of our truckmounts is a serious problem. The precision technology of truckmount
heat exchanger systems is intolerant of any foreign material. Hard water deposits will
ultimately decrease the performance of the system and are expected to seriously lower
the reliability of the machine.
To validate a machine’s warranty, HydraMaster requires that all machines operating in
designated “Hard Water Areas” (3.0 grains or more per gallon [3.79 litres]) be fitted with
a water softening system, or a properly installed magnetic-type descaler must be used
and maintained. Periodic descaling or acid-rinsing alone is not adequate in these areas.
HydraMaster does not recommend any particular type or brand; however, the relative
effectiveness of some types of magnetic descalers or softeners may require additional
periodic use of descaling agents.
HydraMaster also recommends, in the strongest possible terms, that machines in all areas
be fitted with a water softening system for improved operation and reliability.
Failure to take appropriate measures to prevent scale build up can result in system
failure and loss of warranty on affected parts.
Hard Water Area Map
The hard water map, shown in Figure 1-1
, defines hard water areas in the continental
United States which compromise fluid related components such as hoses, fittings, heaters,
pumps, valves and water-cooled engines. For other countries, hard water area maps can
be obtained from geological societies.
Figure 1-1. Hard Water Map of Mainland United States
The map shown in Figure 1-1 is provided for general reference only. Water
hardness in your geographical location should be confirmed by testing.