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SECTION 2
INSTALLATION & OPERATING INSTRUCTIONS
FOR GARDNER DENVER FXF, FXG, FXX, FXD and FXE DUPLEX POWER PUMPS
INSTALLATION – The pump should be installed as
close to the fluid supply as possible. Whenever pos-
sible, ample space should be provided around the
pump to facilitate inspection and adjustment with par-
ticular attention to the space required for removal and
installation of piston rods, liners and jackshafts.
Pump should be properly leveled and securely fas-
tened to whatever type of foundation is provided.
The drive must be accurately aligned.
PIPING
All piping must be supported inde-
pendently of the pump to insure that
no strain is imposed on the pump by
misalignment or improperly fitted
pipe.
Fluid Inlet or Suction Piping – Inlet piping should be
as direct and short as possible and should be laid out
so that air pockets are eliminated. The inlet pipe must
never be smaller than the pump inlet and lines longer
than 20 feet (6 meters) (including friction) must never
be exceeded. To protect the pump from foreign matter,
an inlet strainer should be installed with a net area of
four times the inlet pipe.
Fluid Discharge Piping – It is advisable to use an am-
ple size discharge line to prevent excessive friction.
The use of an air chamber is recommended and ample
size chambers are available for all pumps.
RELIEF VALVE – Pump must be protected from ex-
cess pressure by a discharge pressure relief valve. The
valve must be installed near the pump, preferably in the
opening provided for it in the discharge manifold on
models where applicable. Never install a shutoff valve
in the line between the relief valve and pump cylinder.
The relief valve should be set to operate at approxi-
mately 1–1/4 times the discharge pressure, but must
not exceed system equipment tolerances.
CRANKCASE OIL REQUIREMENTS
Crankcase
API–GL5
Ambient
Operating Oil
Minimum Startup
Oil Grade
Temperature
Temperature *
Oil Temperature
75W–90
–20
_
F to 90
_
F
60
_
to 170
_
F
20
_
F
(–29
_
C to 32
_
C)
(16
_
C to 77
_
C)
(–7
_
C)
80W–140
10 F to 120 F
90
_
F to 200
_
F
50
_
F
(–12
_
C to 49
_
C)
(32
_
C to 93
_
C)
(10
_
C)
80
–10
_
F to 60
_
F
70
_
F to 140
_
F
30
_
F
(–23
_
C to 16
_
C)
(21
_
C to 60
_
C)
(–1
_
C)
90
20
_
F to 100
_
F
100
_
F to 180
_
F
60
_
F
(–7
_
C to 38
_
C)
(38
_
C to 82
_
C)
(16
_
C)
140
50
_
F to 120
_
F
130
_
F to 200
_
F
80
_
F
(10
_
C to 49
_
C)
(54
_
C to 93
_
C)
(27
_
C)
* An 80
_
F (27
_
C) crankcase oil temperature rise over ambient air temperature is typical
for the pumps covered by this manual when operating at or near rated horsepower.
FIGURE 1 – CRANKCASE OIL REQUIREMENTS
