Dosapro Milton Roy G A Series, Instruction Manual, Page: 17 / 40

IV - 2
PROBLEMS WITH FLOW RATE
The pump produces no flow
•
The pump capacity is adjusted to « 0 % » : Adjust
the capacity to the desired value and lock the stroke
adjustment knob.
•
The liquid end is unprimed: release the pressure on
the discharge pipe and prime the liquid end, or
check the leak-tightness of the suction circuit.
•
The balls of the valve assemblies are blocked by
particles: clean or replace the valve assemblies.
First, check whether the presence of these particles
is normal and take corrective action if necessary.
•
The diaphragm is faulty (rupture): see Chapter IV -
1. And replace the diaphragm (see Part V).
The pump does not provide the required flow
rate
•
The pump capacity is incorrectly adjusted: adjust the
capacity to the desired value and lock the stroke
adjustment knob.
•
The 4-function valve continuously
releases pressure: the discharge piping is
partially or totally blocked.
•
The ball seats and/or the balls are dirty or worn:
clean or replace the ball seats and the balls or the
valve assemblies.
•
The tangential wheel is faulty. Replace the « wheel -
connecting rod » assembly [D] (see Part VI).
•
A bearing is faulty. Provide for the replacement of
either the « wheel - connecting rod » assembly [D],
the « male eccentric » assembly [12] or the whole
mechanical assembly [J] (see Part VI).
•
The leak-tightness of the suction circuit is
unsatisfactory: repair or replace the piping.
IV - 5. ORDERING SPARE PARTS
To make it easier to register your order for spare parts
and ensure quicker delivery, please provide us with the
following details:
•
information on the pump: Codel [1] and D.M.R.
internal no. [2]. These two items of information are
shown on the identification plate mounted on the
pump (see Fig. 4.5a).
•
Information on the spare part: reference, description
and quantity. These items of information are
specified in the relevant sheets supplied with the
pump.
You will find the phone and fax number of the Spare
Parts Department at the end of this documentation.
1 Model : Pump code 4 Pmax : Maximum pressure
2 SERIAL : D.M.R. internal No. 5 Date : Date of manufacture
3 Qmax : Maximum capacity
Fig. 4.5a : Identification plate
4FV