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19
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TROUBLESHOOTING
State
Cause
Action to be taken
Pump does not run
Air is not supplied.
Start the compressor, and open the air valve and
air regulator.
The supply pressure is low.
Set the air pressure to 30 psi or more.
The discharge flow valve is not open.
Open the ink delivery valve.
Icing inside exhaust port.
Install air line coalescing filter to remove
moisture.
Pump does not prime
ink during stat up.
The supply air pressure is too high.
Until pump discharge ink from bleeder valve, run
pump 8-10 cycle per minute.
Pump does not
deliver ink
If the plunger operates faster during the moving-up
process, the seat of the piston valve malfunctions
(the seat section is worn out or a foreign substance
is mixed into the valve), or the packing or similar
part is damaged.
Replace the malfunctioning part with a new one,
or remove the foreign substance.
If the plunger operates faster during the
moving-down process, the seat of the foot valve
malfunctions (the seat section is worn out or a
foreign substance is mixed into the valve), the
packing or similar part is damaged, or the shovel
rod is bent.
Replace the malfunctioning part with a new one,
or remove the foreign substance.
If the plunger operates faster during the
moving-down process, the pump operates at a
speed too high for the lower pump to suck ink (the
lower pump is evacuated).
Decrease the air pressure so that this
phenomenon cannot occur (under this condition,
the air pressure you set at this point is the upper
limit the pump can operate at normally).
The screw or other part that fix the air motor and the
plunger of the lower pump is loosened, and then
removed completely (a part located inside the lower
pump may be damaged).
After checking the inside of the lower pump,
replace the damaged part with a new one, and
tighten the removed screw(s) securely.
The pump does not
stop.
Ink leakage from the ink delivery pipe connection.
Tighten the screw fixed at the malfunctioning
section further or replace the damaged part with a
new one.
Ink leakage from the parts-connecting section of the
suction pump assembly.
Air leakage form the
air motor
The screws that connect parts is loosened, or the
O-ring, packing or similar part is damaged.
Tighten the screw fixed at the malfunctioning
section further, or replace the damaged part with
a new one.
Air leakage from the
silencer during stop
A foreign substance is caught between the block
inside the switching valve (804355 or 804358) and
the sliding section of the switching valve seat
(705688), the seat is worn out, or the gasket
(772331) is damaged.
Replace the damaged part with a new one, or
remove the foreign substance.
Ink leakage from the
suction pump
The screws that connect parts is loosened, or the
O-ring, back-up ring, packing or other similar part is
damaged.
Tighten the screw fixed at the malfunctioning
section further, or replace the damaged part with
a new one.
Air entrained in ink
The screws that connect parts of the lower pump is
loosened, or the O-ring, back-up ring, or gasket is
damaged.
Tighten the screw fixed at the malfunctioning
section further, or replace the damaged part with
a new one.
The oil container
swells (is dissolved)
Without Overflow catch bottle.
Put in Overflow catch bottle, when you operate
pump.
Solvent attacks acrylic resin.
Use spindle oil (ISO viscosity grade 10).
The amount of liquid
increases rapidly in
the oil container.
The gland seal is worn out or damaged.
Replace the gland seal with a new one.
----- RETAIN THIS INFORMATION FOR FUTURE REFERENCE-----
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Indicate the part numbers, descriptions, and quantities.