2
INSTALLATION INSTRUCTIONS
Figures for speed (rpm) and pressure apply to
interval operation with cold water.
For continual operation, the speed of all pump
models must be limited to 700 rpm and the
max. operating pressure reduced by 10%.
Required NPSH refers to water: Specific weight
1kg/dm
3
, viscosity 1°E at max. permissible
revolutions.
Operation and Maintenance
Check oil level prior to starting and ensure
trouble-free water supply. Oil: Use ontly 1.4
gallons (5.4 liters) of Industrial Gear Lube Oil
(Giant p/n 01154) or ISO VG 220 (e.g. Aral
Degol BG220) or SAE 90 gear oil.
Initial change after 50 operating hours and then
every 500 operating hours.
Caution when operating in damp places or
with high temperature fluctuations. Oil must
be changed immediately, should condensate
(frothy oil) occur in the gear box.
Keep NPSH under control.
Max. input pressure 145 PSI (10 bar), max.
suction head -4.35 PSI (-0.3 bar).
Safety Rules
Pump operation without safety valve as well
as any excess in temperature or speed limits
automatically voids the warranty. The safety
valve must be regulated in accordance with
the guidelines for liquid spraying units so that
the admissible operating pressure can not be
exceeded by more than 10%.
When the pump is in operation, the open shaft
end must be covered up by a shaft protector
(21), the driven shaft side and coupling by a
contact-protector.
Pressure in discharge line and in pump must
be at zero before any maintenance to the pump
takes place. Close up suction line. Disconnect
fuses to ensure that the driving motor does not
get switched on accidently.
Make sure that 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 to prevent cavitation
occuring, te pump-npshr, positive suction head
and water temperature must be kept under
control.
Cavitation and/or compression of gases
lead to uncontrollable pressure-kicks which
can ruin 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-agressive or
abrasive media with a specific weight similar to
water.
Before pumping other liquids - especially
inflammable, explosive and toxic media
- the pump manufacturer must under all
circumstances 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.
GP5128GB Series Torque Specifications/Lubrication Information
Position Item# Description
Lubrication
Torque Amount
1
13266
Crankcase
Molycote Cu-Paste
3
05943
Oil Sight Glass Assembly
Loctite 572
22 ft.-lbs. (30 Nm)
10
07008
Inner Hexagon Screw
33 ft.-lbs. (45 Nm)
12
07703
Drain Plug, 3/4” BSP
74 ft.-lbs. (100 Nm)
17
13358
Hexagon Screw
33 ft.-lbs. (45 Nm)
24
13276
Connecting Rod Assembly
22 ft.-lbs. (30 Nm)
31
13284
Radial Shaft Seal
Loctite 403
29C
13031
Tension Screw, Plunger
Loctite 243
22 ft.-lbs. (30 Nm)
48A
07008
Inner Hexagon Screw, Plug
35 ft.-lbs. (47 Nm)
49
13339
Inner Hexagon Screw, Valve Casing
89 ft.-lbs. (120 Nm)
