Demco LIL'THUMPER, Руководство оператора

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Page 15
TROUbLE SHOOTING FOR PISTON PUMP
PRObLEM PRObAbLE CAUSE SOLUTION
Pump will not prime valves fouled Clean valves
Piston wipers worn Replace Wipers
Strainer plugged Clean strainer
Sucking air in suction line Repair line
Air lock in suction line Reroute suction line
Worn piston Replace piston
Pump puts out too little valves fouled Clean valves
Piston wipers worn Replace wipers
Strainer plugged Clean Strainer
Sucking air in suction line Repair line
Air lock in suction line Reroute suction line
Worn piston Replace piston
broken valve spring Replace valve
Improper rate setting Check calibration
Pump puts out too much Improper setting Check calibration
Chemical leaks through broken valve spring Replace valve
after pump has stopped valves fouled Clean valves
Solution leaking from Stackpack glands worn Replace stackpacks
weep hole at bottom Piston rod could be worn Replace rod
front of pump neck
Pump leaks oil Oil seal or O-ring worn Replace seals
Too much oil in drive case Lower oil level
Torn gasket Replace gasket
Short term storage - overnight -
in steady or rising tem-
peratures: No special precautions are necessary. DO NOT
DRAIN OR ADMIT AIR!
In Falling Temperatures -
Shut off valve between tank and
pump. Remove the inlet and outlet hoses and inlet manifold
plugs. Using a long thin rod, drain the inlet valve by pump-
ing the rod up and down into each of the inlet manifold plug
holes until the chemical mixture in the valve bodies and
cylinder runs out (about two cups of fluid).
Note: Catch all
draining chemicals and return to tank. Loosen the pump
from the mounting and tip on end to completely drain the
outlet manifolds. Remount the pump. Replace and tighten
the manifold plugs and check oil level in pump.
PISTON PUMP STORAGE
Seasonal storage - Disassemble pump and clean all
internal parts individually. Replace any worn parts such
as piston, piston wipers, stackpacks, piston rod, etc. After
washing all internal parts with soap and water, coat all
parts with motor oil. Reassemble and fill pump with RV
antifreeze. Make sure the valves are installed correctly with
the BLUE valves in the inlet manifold and the RED valves
in the outlet manifold. Refer to the PARTS BREAKDOWN
section of this manual for proper valve placement. Close
and seal all openings.
NOTE: The main factors in the pump affecting output are
the piston, wipers and the valves. It may be advisable to
keep a spare set of wipers on hand and make sure your
dealer has pistons and valves on hand or readily available.
This is to prevent delays during the season in case the pump
is run dry and premature wear is experienced.