IMO ACF5 Maintenance & Service Instruction
ACF5 0601.01 GB
ACF5
Maintenance & Service Instruction
Screw pump
ACF5 0601.01 GB
www.imo.se
2
Indentification of safety instructions
Non complience of safety instruc-
tions identied by the following
symbol could aect safety for
persons
Safety instructions where
electrical safety is invol-
ved are identied by:
Safety instructions which shall be considered
for reasons of safe operation of the pump
or pump unit and/or protection of the
pump or pump unit itself are marked
by the sign:
cm
;
Introduction
A screw pump from IMO is a quality product that is designed for a long problem free operation in tough environments. As all other mechanical products they do however requires a certain grade of maintenance and service in
order to guarantee a faultless and economic favourable operation.
A recommendation is to go through the pump each 5 year in order to replace wear details such as ball bearings,
the mechanical seal and certain gaskets and o-rings. A relatively small review of a screw pump from IMO means
that the pump in most of the cases will be in a condition “as new” and therefore give the operator another long and
problem free operation.
ACF5 0601.01 GB
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Contents
Introduction .......................................................................................................................................................................... 2
List of components ............................................................................................................................................................... 4
Recommended Spare Parts Kits ......................................................................................................................................... 5
Service intervals ................................................................................................................................................................... 6
Inspection of rotors .............................................................................................................................................................. 6
Inspection of sha seal ........................................................................................................................................................ 6
Warranty maers ................................................................................................................................................................. 6
Precautions prior to starting maintenance on the pump .............................................................................................. 6
Dismantling and reassembling the pump 7
List of tools necessary for dismantling and reassembly ................................................................................................ 7
Sectional View ...................................................................................................................................................................... 7
Dismantling 8
Reassembly 1
2
Installation and Start-up Instruction 15
Installation 16
Transport and storage ....................................................................................................................................................... 16
Liing of pump .................................................................................................................................................................. 16
Allignment and sha couplings ...................................................................................................................................... 16
Strainer ................................................................................................................................................................................ 17
Pipe connections ................................................................................................................................................................ 18
Suction line ......................................................................................................................................................................... 18
Discharge line ..................................................................................................................................................................... 18
Deaeration ........................................................................................................................................................................... 18
Liquid trap .......................................................................................................................................................................... 18
Gauges ................................................................................................................................................................................. 19
Pressure relief valve .......................................................................................................................................................... 19
Start-up 20
Before starting: ................................................................................................................................................................... 20
Direction of rotation .......................................................................................................................................................... 20
Safety precautions before starting .................................................................................................................................. 20
Starting ................................................................................................................................................................................ 20
Seing the pressure relief valve ...................................................................................................................................... 21
Adjusting the tuning ......................................................................................................................................................... 21
Seing of tuning of the ACF: ............................................................................................................................................ 21
Trouble shooting 22
ACF5 0601.01 GB
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4
Explanations:
ACF: Pump with
DIN anges
CW: Clockwise
rotation
CCW: Counter clock
-
wise rotation
G011: Rotor set CCW
rotation
G012: Rotorset CW
rotation
G050: Compl sha
seal
G053: Minor kit
(G050+G057)
G054: Major kit
G057: Joint kit
G070: Valve element
Included components in Spare part sets
Pos Part Denomination Qty G011 G012 G050 G053 G054 G057 G070
1010 Complete power rotor (CCW-rot.) 1 x x
1020 Complete power rotor (CW-rot.) 1 x x
(103) Ball 1 (x) (x) (x)
(104) Spring 1 (x) (x) (x)
(105) Hole screw 1 (x) (x) (x)
(106) Balancing piston 1 (x) (x) (x)
113 Key 1 x x x
122 Ball bearing 1 x x x
130 Support ring 1 x x x
131 Retaining ring 1 x x x
132 Support ring 1 x x x
201 Idler rotor (CCW-rotation) 2 x x
202 Idler rotor (CW-rotation) 2 x x
401 Pump body 1
4240 Tuning element 1
(424) Cover 1
(424A) Gasket 1 x x x
(425) Screw 4
(429) Guiding screw 1
(429A) Tenison pin 1
(430) Piston 1 (Valid for sizes 100-125) 1
(432) Tenison pin (Valid for sizes 100-125) 1
(437) O-ring 1 x x x
451 Screw 4
451A Washer 4
453 Screw 8
455 Screw 4
455A Washer 4
462 Plug 1
462A Washer 1 x x x
463 Plug 1
463A Washer 1 x x x
480 Valve housing 1
501 Front cover 1
506 O-ring 1 x x x
509 Mechnical seal 1 x x x
(509A) Rotating seal ring 1 (x) (x) (x)
(509B) Seat 1 (x) (x) (x)
(509C) Rubber ring 1 (x) (x) (x)
(509D) Washer 1 (x) (x) (x)
(509E) Spring 1 (x) (x) (x)
(509F) O-ring 1 (x) (x) (x) x
520 Compl. cover 1
520A O-ring 1 x x x
(520B) Tension pin 1
521 Screw 4
521A Washer 1
(537) Plug 1
(537A) Washer 1 x x x
556 Gasket 1 x (x) x
6000 Valve cartridge 1 x
(6010) Compl. valve cover 1 (x)
(602) Pin 1 (x)
(603) O-ring 1 x x x (x) (x)
(605) O-ring 1 x x x (x) (x)
(608) Valve spindle 1 (x)
(609) Washer 1 (x)
(610) Ball bearing 1 x x (x) (x)
(612) Regulating nut 1 (x)
(614) Valve piston 1 (x)
(615) Spring 1 (x)
(622) Nut 1 (x)
(623) Ball bearing 1 x x (x) (x)
List of components
Valid for all ACF Generation 5 pumps with leads and sizes: 080, 090, 100 K5/N5 & 110, 125 L5/N5.
With version codes: IVBP & NVBP. Also valid with options A020, A078, A101.
ACF5 0601.01 GB
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1
m
Before commencing any work, read this instrucion carefully! Failure to comply with these instrutions
may cause damage and personal injury!
For more information about the pumps identication code, technical data and performance we refer to the ACF
Product description.
Pump size
Pos 080 090 100 110 125
G011 Rotor set N-lead 192966 192968 192970 192972 192974
CCW K-lead 192967 192969 192971
L-lead 192973 192975
G012 Rotor set N-lead 192785 192958 192960 192962 192964
CW CW K-lead 192786 192959 192961
L-lead 192963 192965
G050 Sha seal xVxx 192525 192525 192526 192526 192526
G053 Minor kit xVxx 192987 192987 192988 192988 192989
G057 Joint kit xVxx 192990 192990 192991 192991 192992
G070 Valve xxxP 192553 192553 192554 192554 192555
G099 Complete IEC 132 192993 192997
sha IEC 160 192994 192998 193002 193002 193002
coupling IEC 180 192995 192995 193003 193003 193003
IEC 200 192996 192996 193004 193004 193004
IEC 225 193001 193005 193005 193005
IEC 250 193006 193006 193006
IEC 280 193007 193007 193007
Kit Contents To be used for
G057 Gaskets, o-rings,
ball bearing, etc
Dismantling of
the pump
G053 G057 + Sha seal
G050
Normal scheduled inspection
G054 G053 + Complete
rotor set
Repair aer major
breakdown or
great wear
Recommended Spare Parts Kits
Every shutdown for service of a plant is
costly. The time for repair should therefore
be limited to a minimum which can be
accomplished by keeping a spare pump.
The changed pump can later be repaired at
a suitable place and can then be used as a
spare pump. For maintenance the following
spare parts kits are recommended:
Ordering Code
ACF5 0601.01 GB
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6
Service intervals
The intervals for inspection and replacement of wear
parts vary greatly with the properties of the pumped
liquid and can only be determined by experience. All
internal parts of the ACF-pump are lubricated by the
pumped liquid.
Pumping liquid which contain abrasive materials, or
liquid that is corrosive, will signicantly reduce service
life and call for shorter service intervals.
Wear in the pump will normally show as:
• Vibration
• Noise
• Loss of capacity
• Reduction in ow/pressure
• Leakage
We recommend planned inspection and overhaul at
regular intervals, not exceeding 3 years.
It is recommended to always have the spares included
in minor spare part kit G053 available for a planned
inspection.
Inspection of rotors
To reach the idler rotors in a quicker way than described in the dismantling section, loosen the rear cover
(480) with valve. Screw out the idler rotors backwards.
Internal clearances in the pump, which are vital for its
proper function, may have been aected by wear. Acceptable wear can be determined only by experience of
the actual application. As a rule of thumb the following
max clearance values may apply: Between rotor and
bores: 0.2 mm, Between rotor anks: 0.4 mm For light
duties (low pressure, medium viscosity) even bigger
clearances may be acceptable but for low visc./high
pressure duties the limit will be lower. Also watch if
there are major scratches on these parts.
Inspection of shaft seal
As the seal faces of a mechanical sha seal are lubricated by the uid a certain leakage will always be present.
Ten drops per hour can be considered as acceptable. An
external visual inspection of the pump is advisable at
least every two days to assure that the sha seal is not
leaking too much.
Excessively leaking sha seals should be changed without delay, as the leakage normally will grove worse and
cause additional damage.
Follow the instructions in the dismantling/reassembly
session. When working with a sha seal, cleanliness is
of outmost importance. Avoid touching the seal faces.
If necessary, the seal faces should be cleaned immediately prior to assembly, using a dust free cloth and clean
solvent.
Warranty matters
IMO AB´s warranty obligations covers new pumps for 1
year aer the commissioning of the pump.
Parts that NOT are covered by the warranty are normal
wear details such as the mechanical sha seal, the ball
bearing or the exible coupling.
Precautions prior to starting maintenance on
the pump
2
m
If the pumps operating temperature
exceeds 60°C, let the pump cool o before
any service, maintenance or dismantling
work is commenced to avoid burn injury
3
m
All work carried out on the pump has to be
performed in such a manner that risks for
personal injury are observed!
4
m
When handling liquids that may harm skin,
use gloves and/or protecting clothing!
5
m
When handling liquids which may involve
re hazard appropriate precautions to
avoid danger are to be taken.
6
m
In case of failure for system with elevated
pressure, uid jets may cause injury and/
or damage.
7
m
Oil leakage may make the oor slippery
and cause personal injury.
8
m
Before any maintenance work, ensure that
the driver is deenergized and the pump
hydraulically isolated.
9
c
Connecting and disconnecting of electrical
cables must be done only by personnel
authorized to do such work.
ACF5 0601.01 GB
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ACF 5 © IMO AB
d
D
GREASE
L
A B C D E F G H I
List of tools necessary for dismantling and reassembly
A = Slide calliper
B = Screw driver
D = Crow bar
E = Plastic mallet
F = Puller
G = Allen key
H = Pairs of pliers
I = Mounting sleeve
J = Oil can
Sectional View
Dismantling and reassembling the pump
Mounting sleeve
dimensions (mm)
Pump
size d L D
080 46 155 62 ±3
090 46 155 62 ±3
100 66 180 85 ±4
110 66 180 85 ±4
125 66 180 85 ±4
ACF5 0601.01 GB
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ACF5 © IMO AB
ON
OFF
Dismantling
A.
For most installations repair can be done with the
pump in place by removing the motor.
• Turn the electricity OFF.
• Close the valves.
• Disconnect the electric motor.
• For horizontal installation drain the pump by
loosen screws 453 3-4 turns and loosen 480
valve housing.
10
;
Use appropriate vessels to collect oil
spillage when operating the pump
11
m
Pump and/or motor should be lied
with straps securely so that the
centre of gravity is located in order
to avoid tipping
B.
• Loosen and remove screws 521
• Pull out the power rotor 1020 with the help of
coupling half or an eye bolt ed in the power
rotor
12
;
Be careful when the threaded part of
the rotor passes the bore in the cover
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