Maintenance
18
Filters
Clean all filters daily. More frequent
cleaning
may
be
found
necessary
depending upon circumstances. The best
method for cleaning filters is to wash them
with a soft bristle brush. Check for any
tears or holes and replace if damaged.
Pump Mounting
Check daily, especially when there is
vibration during use that the pump
mounting bolts on the machine frame are
tight and if necessary re-tighten.
Tank and Spray Lines
At the end of each day run clean water
through the pump and lines to purge them
of chemicals. Rinse out the tank to remove
powdered material.
Never leave chemicals in the tank that may
settle to the bottom, harden and break into
lumps as this may block the suction filter.
Freezing Conditions
If frosts or freezing conditions are likely to
occur then drain all water from the pump to
ensure the pump is not damaged by
freezing water expanding inside the pump.
EVERY 50 HOURS
Diaphragm Pump
Check the inflation of the pressure
accumulator, if fitted, according to Table A
(in the Operations section of this manual)
especially if there are vibrations on the
delivery hose and/or the pressure gauge.
Pressure Regulator
Grease rotating and sliding parts.
Plumbing
The suction system must be inspected to
ensure:
1. There are no suction air leaks. Check for
entry of air caused by:
- entry of air caused by hose wear;
- loose fittings;
- worn joints;
2. There are no small leaks or drips on the
suction side of the pump when it is
stationary. If this occurs it means air will
enter the pump when in operation.
3. There are no leaks around all hoses and
fittings.
Hardware
Check all bolts are tight. Refer to Silvan
Torque setting chart available from Silvan
Technical Support Dept.
EVERY 300 HOURS
Diaphragm Pump
Every 300 hours (or more often if sandy
water or abrasive liquids are used) change
the oil and the diaphragms in the pump and
inspect the mechanical condition of the
components. This must be carried out by an
authorized Silvan dealer.
Pressure Regulator
Check the pressure adjustment valve.
PTO Shaft and Guard
Check the shaft and guard for wear and if
necessary have it repaired by an authorized
Silvan Dealer.
ANNUALLY
Diaphragm Pump
Check
diaphragms
and
replace
if
necessary.
Replace the oil.
Pressure Regulator
Check and replace the inner diaphragm
where required and check screws are tight.
Hardware
At the end of each season, generally
inspect the sprayer for any signs of
damage and check that all bolts are
securely tightened.
Storage in cold areas
The pump is not frost proof therefore it is
recommended that motor grade anti-freeze
(diluted to the recommended proportions)
be pumped through the system for 2
minutes. The system should then be
drained by operating the pump for a
further 2 minutes without taking up any
liquid.
