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“Troubleshooting and Actions for Power Sprayer” lists conditions that may occur and the actions to
be taken. Should any failure occur, see the list and take the proper action. If you do not know the
cause or have any question, please contact your MARUYAMA service dealer.
1. Model
2. Serial No.
3. Failure description (what resulted in what how by doing what)
Detail these matters.
For
◎
, ask your MARUYAMA service dealer for adjustment or repair.
State
(1)
No suction
or low
suction
(2)
Pressure
does not
increase
Transmission
To the water
intake port
Water intake
and
pressurizing
part (cylinder)
Pressure
control
Water intake and
pressurizing part
Pressure
control
Suction clogged with dust / dirt Clean
Suction hose damaged/bent Repair/replace
Water intake connection packing failure
Repair/replace
Connection error
Connect correctly
Too long water intake hose Replace
Too large water intake pump head Decrease depth
Water intake valve/discharge valve clogged with dust or stuck
Clean
Water intake valve/discharge valve assembly error
Assemble correctly
Water intake valve/discharge valve damaged or worn out
Correct/replace
Discharge valve spring broken Replace
Piston packing damaged Replace
O-ring damaged Replace
Seal packing damaged Replace
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◎
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Pressure control valve handle in the pressurizing state
Move the handle to
the start position
Pressure control stuck in position
Disassemble/clean
Insufficient water intake volume See (1)
Pressure control valve ball/ball seat damaged
Replace
Pressure control valve rod error Adjust/replace
Pressure control valve spring cylinder error
Repair/replace
Pressure control valve spring damaged/degraded
Replace
Belt slip Adjust/replace
Cause Action
Do not remove the cap on the top of the pressure control valve grip and adjust the screw. A
pressure higher than specified may occur, the machine may be damaged, and personal injury
may occur. Therefore, never take this action.
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