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General Maintenance Information
BEFORE SERVICING OR MAKING ADJUSTMENTS
ON THE SPRAYER, ALWAYS DISENGAGE POWER,
SHUT OFF THE ENGINE, MAKE SURE ALL MOVING
PARTS HAVE STOPPED AND ALL PRESSURE IN
THE SYSTEM IS RELIEVED.
Check the conditions of hoses and connections fre-
quently. Release the system pressure before working
on the sprayer. To release the pressure. Flip the
boom section switches on and off without the pump
running. Always wear rubber gloves when making re-
pairs or adjustments. Make sure all personal Safety
Equipment (gloves, goggles, etc.) listed in page 6, is
stored in an easily accessible place but protected from
potential contamination from dust or chemicals.
Check the sprayer for any loose bolt, pins and hose
clamps. Check the straps holding the tank in place and
tighten when necessary.
Check the hoses, pumps, valves and fittings for any
leaks.
NEVER USE FIGERS, HANDS OR ANY PART O FY-
OUR BODY TO INSPECT THE SPRAYER! IF YOU
SUPECT A LEAK, USE A PIECE OF THICK PAPER,
CARD STOCK OR CARDBOARD INSTEAD OF
YOUR FINGERS TO FIND THE LEAK. MAKE SURE
YOU ARE WEARING ADEQUATE EYE PROTEC-
TION WHEN VISUALLY INSTECTING FOR LEAKS.
HIGH PRESSUER LIQUID CAN EASILY PENETRATE
SKIN!
Inspect all parts of the sprayer for wear and rust. Re-
pair and paint parts as necessary.
Pump Maintenance & Repair
The Hy Pro pump (also refer to Hy Pro Pump Manual)
is designed for long life and service. Eventually, there
may be a need to replace the mechanical seal or ser-
vice some component of the pump. A mechanical seal
may weep slightly but if it starts to drip, the pump will
have to be disassembled. Before you disassemble the
pump, be sure to wash it out with fresh water.
If the pump is leaking, before you remove it from the
sprayer, run the pump with adequate water in the tank
to diagnose the actual pump problem. If fluid leaks out
between the suction housing and the pump volute
housing, the housing gasket may be dried out. Give
the gasket adequate time to absorb moisture and swell
up. If necessary, retighten the volute housing by alter-
nating on opposite sides until all nuts are torqued to
16—18 ft.lbs. It is a good practice to apply grease to
both sides of the gasket to prevent shrinkage.
If the pump seal is leaking causing a drip between
the volute housing and aluminum bearing housing,
the seal may be covered with gritty chemical residue.
If the ceramic part of the seal is cracked, the pump
may have been run dry. If the pump seal spring does
not firmly attach to the impeller during assembly it will
come out of alignment and cause the seal to leak. In
this case the impeller will need replacement. Any
damage to the pinion shaft may cause pump leak-
age.
If the pump is not leaking it can be pressure tested by
closing the agitation valve and the manual pressure
control valve to build up maximum pump pressure.
At high engine speed, the pump pressure should reg-
ister 70—80 psi on the agitation gauge. If pressure
fluctuates, the impeller may be loose or clogged with
debris. The impeller can be opened and cleaned by
removing six screws in the back side of the impeller.
Carefully inspect the fiberglass housing for cracks,
especially around the webs and bolt holes. Air leaks
will prevent the pump from building up pressure.
CAUTION
CAUTION
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