41
180R9270 / IOM APP S 674 - v01 / 03.2013
Instruction
APP S 674 pumps
4
180R9276 / 521B1245 / DKCFN.PI.013.Z1.02 / 03.2013
3.
Building up
the pump unit
3.1 Mounting
D
A: Flexible coupling
B: Bell housing
C: Motor shaft
D: Pump flange
1.
Mount the coupling on the pump shaft.
Ensure an air gap between coupling and
pump flange of min. 4 mm (0.16 in).
2.
Mount the bell housing on the pump. Secure
nuts with the right torque.
3.
Measure the longest distance “A” from top of
bell housing to the button of coupling claw.
4.
Mount the coupling on the motor shaft.
Ensure the coupling and motor flange are not
in contact with each other.
2.3 Protection of too high pressures
The pump should be protected against too high
pressure by using a safety valve or a pressure
relief valve.
The valve should be placed as close to the pump
as possible.
The opening characteristics of the valve must not
result in peak pressures higher than 80 bar
(1,160 psi).
The valve outlet must not be connected
directly to the pump suction line. It must be
connected directly to the drain.
PS
Instruction
APP S 674 pumps
5
180R9276 / 521B1245 / DKCFN.PI.013.Z1.02 / 03.2013
3.2 Direction of rotation
The direction of rotation is indicated by an arrow
at the pump label.
3.3 Orientation
The pump can be mounted/orientated in any
horizontal direction; vertically only with the shaft
pointing upwards.
5.
Measure from motor flange to the top of the
coupling. The measurement “B” shall be
3-5 mm (0.12 - 0.2 in) shorter than the
measurement “A”.
6.
Adjust respectively, verify the measurement,
and secure both couplings with the right
torques on the locking screws (see coupling
operation & mounting instruction).
7.
Mount the flexible gear ring and mount the
bell housing/pump on the motor. After
mounting it must be possible to move the
flexible gear ring 3-5 mm (0.12 - 0.2 in) axial
“C”. The check can be done through the
inspection hole of the bell housing. Secure
flange bolts with the right torque.
If alternative mounting is desired, please contact
Danfoss High Pressure Pumps.
Choose proper tolerances to ensure an easy
mounting of the flexible coupling without use of
tools.
Please take care to observe the recommended
length tolerances of the chosen coupling, as an
axial force on the pump will damage the pump.
C
B
A
1
2
3
1 = Nuts:
APP S 674 3.0-3.5:
40 ± 4 Nm / 30 ± 3 lbf ft
APP S 674 5.1-9.0:
40 ± 4 Nm / 30 ± 3 lbf ft
APP S 674 21-38:
40 ± 4 Nm / 30 ± 3 lbf ft
2 = Bolts:
APP S 674 3.0-3.5:
40 ± 4 Nm / 30 ± 3 lbf ft
APP S 674 5.1-9.0:
75 ± 5 Nm / 55 ± 3.5 lbf ft
APP S 674 21-38:
75 ± 5 Nm / 55 ± 3.5 lbf ft
3 = Torque, see table beside:
Thread size
M4
M5
M6
M8 M10 M12
Torque (Nm)
1,5
2
4,8
10
17
40
Torque (lbf)
1.1
1.5
3.5
7.4 12.5 29.5
