3
the desired maximum operating pressure;
the pump is then run in. Check the oil
temperature during this process.
Important!
The pump must be emptied
if there is a danger of frost. Travel wind
can cause water in pumps fitted on open
vehicles to freeze even if the outside
temperature is above freezing point.
The torque tension on the valve casing
nuts (49A) should be checked after
approximately 200 hours. Please see the
section “Torque Specifications” on page 8.
When checking the torque tension, the
pump must be at zero pressure.
Important!
The service life of the seals
is maximized if a minimal amount of
leakage is present. A few drops of water
can drip from each plunger every minute.
Leakage has to be examined every day;
the plunger seals must be changed should
leakage become excessive (i.e. constant
dripping).
!Safety Rules!
Before performing any work on the
pump or complete assembled unit,
the operating instructions must be
read and followed. Giant will not bear
responsiblity for damage to materials
or persons caused by improper
handling of our pumps.
For unauthorized personnel, access to
the pump is not allowed. A safety valve
is to be installed in accordance with the
guidelines for liquid spraying units so that
the admissible operating pressure cannot
be exceeded by more than 10%. Pump
operation without a safety valve as well as
any excess in temperature or speed limits
automatically voids the warranty.
INSTALLATION INSTRUCTIONS
When the pump is in operation, a
protective guard must cover the driven
shaft side and its coupling. The plunger
area must also be cover by the protective
plate (30).
Do not step onto the protective plate (30)
nor put weight on it.
Pressure in the discharge line and pump
must be at zero before carrying out any
maintenance work to the pump or unit.
Close off suction line. Disconnect fuses to
ensure that the driving motor cannot get
switched on accidentally. Make sure that
the pump, the cooling system and all parts
on the pressure side of the unit are vented
and refilled, with pressure at zero, before
starting the pump.
In order to prevent air or an air/water-
mixture being absorbed and cavitation
occurring, the pump-npshr, positive
suction head and water temperature must
be respected.
Cavitation and/or compression of
gases lead to uncontrollable pressure-
kicks, which can ruin the pump and
unit parts and also be dangerous to the
operator or anyone standing nearby.
Giant plunger pumps are suitable for
pumping clean water and other non-
aggressive or nonabrasive media with a
specific weight similar to water.
Before pumping other liquids-
especially inflammable, explosive and
toxic media-the pump manufacturer
must be consulted with regard to the
resistance of the pump material. It is
the responsibility of the equipment
manufacturer and/or operator to
ensure that all pertinent safety
regulations are adhered to.
