Sunfab SCPD 56/26 DIN User manual

200/200 bar 178 + 83 = 261 Nm
300/300 bar 267 + 124 = 391 Nm
400/400 bar 356 + 165 = 521 Nm
L
R
PUMP SCPD 56/26 DIN
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
7012EN1603 REV 1.3
1/8
Instruction manual
Thank you for choosing Sunfab
You have chosen SCPD 56/26, a dual flow pump with the
highest displacement-to-size-ratio on the market. It can
effectively be directly mounted on gear boxes equipped with
engageable and disengageable power take-offs. Compact
design and easy installation makes SCPD 56/26 one of the
mainstays for powerful, trouble free hydraulic systems.
Installation requirements
Power Take-Off
• Pump mounting: Spline shaft DIN 5462 / ISO 14.
Mounting flange ISO 7653-D.
• It must be possible to disengage the power take off to
prevent overspeed when the hydraulic system is not in
use.
• The output speed of the power take off must not exceed
the pump’s max speed.
• The permitted torque output on the power take off must
be higher than the pump’s shaft torque at maximum
pressure.
• The power take off’s direction of rotation must cor-
respond with the selected pump, which is supplied in
left-hand (L) or right-hand (R) designs.
NOTE! The cover must not be turned to change the direc-
tion of rotation.
EN
Remember
A trouble-free hydraulic system is created using selected
components and correct installation. Consequently, follow
the instructions in this manual, which includes checking the
power take off, tank design, hose dimensions, installation and
start up. Failure to carry out the manufacturer’s installation
conditions will invalidate the warranty.

1
2
3
4
5 6
Optional design, solid baffle plate.
Recommended design.
Non-recommended design.
di
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
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If the suction line is more than 2 m
long the internal diameter must be
increased by 10 mm for each meter
extension.
Recommended design
Optional design, solid baffle plate
Non-recommended design
Installation requirements (Continued)
Oil tank
The design of the tank is important so that air bubbles are
not drawn into the pump and on into the system. Here are
two recommended designs:
1. Air bubbles from the return oil are guided by the oil flow
up to the oil surface (venting area) via an oil pipe mounted
at the bottom of the tank. Another option, yet not as
reliable, is a tank with a solid baffle plate as shown in the
middle picture.
2. Eventual drainage hoses is connected close to the
bottom, as far as possible from the suction connection.
3. Large return filter corresponding to 4 x the pump flow.
4. Separate air filter, which is fitted protected from water and
dirt.
5. Suction connection close to or in the bottom of the tank
on the opposite side to the return filter.
6. The net volume of the tank should be at least 1.5 x the
pump flow and positioned so that the oil level lies above
the pump.
A traditional tank fitted with a baffle plate with holes is not
recommended as this does not deaerate the oil satisfacto-
rily.
Sunfab Oil tank
This tank is included in the Sunfab range of accessories.
It incorporates the latest advances in tank design to give
trouble-free operation.
The tank is available in two material options: stainless steel
and aluminium.
Pressure relief valves
The hydraulic system must be equipped with a pressure
relief valve for each circuit if the flow is used for different
functions.
Recommended line size (di)
All dimensions, internal diameter
Max flow 120 lit/min 160 lit/min
Max speed 1 470 rpm 1 850 rpm
Suction hose 50 mm (2”) 64 mm (2½”)
Shut off valve 50 mm (2”) 64 mm (2½”)
Return hose 32 mm (1¼”) 38 mm (1½”)
Pressure hose 19 mm (¾””) 19 mm (¾”)

A B CD
A
0-20 20 40 60 80 100 C
68
46
32
BCD
A B CD
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
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Installation requirements (Continued)
Hydraulic oils
Quality:
• Mineral oil
Use a high quality oil whose technical properties
conform, as a minimum, to the following requirements:
ISO type HM VG 32-68 depending on the ambient air
temperature. Alternatively DIN 51524-2 HLP.
• Environment oil
Use synthetic ester that conforms to the same technical
requirements as the standards above.
Oil filling - Oil changing:
• New hydraulic oil has a too high impurity level. Filling
should therefore be done with the help of a filter unit or
through the oil tank’s return filter.
• Do not mix oil of a different quality, viscosity or brand.
This will impair the technical properties of the oil.
Viscosity:
The viscosity of the hydraulic oil drops (the oil becomes
thinner) when the temperature rises. An ideal choice is an
oil with a high viscosity index (VI). A higher VI gives less
viscosity variation when the temperature changes.
• At a viscosity higher than 1500 cSt (limit for cold start)
the pump cannot suck in the oil.
• At a viscosity lower than 10 cSt the lubrication capacity
is insufficient. System efficiency will also be impaired.
• An oil cooler must be used, when there is a risk for the
oil temperature in tank to exceed 60 °C.
Refers to oil temperature in pump
E.g. Hydraulic oil 32: The designation “32” denotes the viscosity is 32 cSt at
40 °C. Lowest start temperature is -23 °C and highest working temperature
82 °C. Ideal working temperature is 35 - 55 °C.
A
B
C
D
NOTE! The diagram concerns hydraulic oil with viscosity index VI ≈ 180
The hydraulic system can be started but not loaded. Only circulation pumping
at idling speed 1500-700 cSt.
The system can be loaded 700-40 cSt.
Ideal working range 40-20 cSt.
Highest recommended operating temperature 20-10 cSt.
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=
=
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Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
4/8
Installation requirements (Continued)
Filtering
To invest in cleanliness is worthwhile:
• Halving the amount of particles doubles component life.
• Halving the amount of particles reduces the degree of
malfunction by half.
To conform to most market demands on operating reliabil-
ity and life span the impurity level of the oil should corre-
spond to class 18/16/13 as set out in ISO 4406.
Consequently, the hydraulic system is equipped with a
return filter and air filter with a degree of filtration equal to
10 μm absolute.
Furthermore, the hydraulic system should be equipped
with a pressure filter if necessary.
Changing the filter:
First change after 50 hours of operation. Then whenever
the filter pressure indicates a too high pressure at the
normal operating temperature for hydraulic oil.
A good rule is to change the air filter at the same time.
Contamination level 18/16/13
Max 64,000 particles > 5 μm/100 ml.
Max 8,000 particles > 15 μm/100 ml.
18/16/13 10 μm
absolute
After changing the filter, run
with the lowest possible flow
for at least 5 minutes to ensure
the filter functions.

24 Nm
50 mm ( 2 ")
64 mm ( 2 ½")
G ¾, 150 Nm
Flow B
Flow A
Connection G¾G ¾
to cooling pipe/
drainage pipe.
80 Nm
80 Nm
80 Nm
Fill the pump with
hydraulic oil.
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
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Installation
Pump installation
Lubricate the splined shaft before installation using assembly
paste intended for spline joints, e.g. Molykote G Rapid plus,
or the like. Do not hit the gear wheel/drive disc. Use an M12
stud bolt and sleeve when assembling the gear wheel. Use
an M12 stud bolt and washer when assembling the drive disc.
Secure the gear wheel using a circlip or M12 bolt and
locking fluid. Secure the O-ring and fit the pump on the
power take-off. The manufacturer of the power take-off
may have different requirements.
Connections
Secure the O-ring and tighten the suction connection bolts
crosswise. Tighten the hose using two heavy-duty hose
clips. Use pressure connections with flat seals against the
pump for optimal strength. Do not use connections with
tapered threads.
Tank location and hose routing
The tank should be positioned as high and as close to the
pump as possible in order to create good suction conditions
for the pump. The suction pipe must be routed so that air
pockets cannot form to prevent cavitation and noise.
SCPD 56/26 is internally drained.
Start up
Start and run the pump unloaded at idling speed and allow
the hydraulic oil to circulate through the hydraulic system
for at least five minutes before the system’s functionality is
tested.
The pump can be installed in 4 positions with
the angle upwards, downwards or to the side.
When the angle is to the side it is an advantage
if the pump can be twisted so that the suction
connection is highest.
Flow B
Flow A
Fill the pump
with hydraulic oil

Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
6/8
Cause
1. Pump not vented after installation.
2. Air leakage on the suction hose or pump.
3. Oil level too low.
4. Not optimal designed tank for separa-
tion of air from the oil.
5. Oil tank with too small air venting area.
1. Too small diameter on the suction hose.
2. Crushing or restriction of the suction
hose.
3. Oil too thick.
4. Underpressure in the oil tank.
1. Too small a diameter or restriction in
the pressure or return hoses.
2. Clogged pressure or return filter.
3. Oil flow too great.
4. Pressure relief valve tripped at too low
a pressure.
5. Oil too thin.
6. Oil tank too small.
7. Oil level too low.
8. High continuous power output.
1. Pressure relief valve tripped at too low
a pressure.
2. Defective directional control valve.
1. Pressure relief valve tripped at too
low a pressure.
2. Worn pump.
1. Too small diameter on the suction hose.
2. Crushing or restriction of the suction
hose.
3. Oil too thick.
4. Underpressure in the oil tank.
5. Worn pump.
1. Leakage from the suction connection.
2. Leakage from the shaft seal.
3. Leakage from the plugs/fittings.
1. Play on intermediate shaft.
2. Incorrect joint angle on intermediate
shaft.
3. Imbalance on intermediate shaft.
4. The universal joints are not in line with
each other.
Rectifying a malfunctioning hydraulic system
Action
1. Vent the pump.
2. Repair the air leakage.
3. Fill with oil.
4. Replace the return filter with an oil
pipe or tank with solid baffle plate.
5. Change to a tank with a greater air
venting area.
1. Change to a suction hose with a
larger diameter.
2. Remove the restriction.
3. Change to an oil with a lower viscosity.
4. Change the air filter.
1. Change to hoses with a larger diam-
eter; rectify the restriction.
2. Replace the filter.
3. Lower the speed or change to a
smaller pump.
4. Adjust the valve or replace if necessary.
5. Change to an oil with a higher viscosity.
6. Change to a larger oil tank.
7. Fill with oil.
8. Fit an oil cooler.
1. Adjust the valve or replace if necessary.
2. Replace the directional control valve.
1. Adjust the valve or replace if necessary.
2. Replace the pump.
1. Change to a suction hose with a
larger diameter.
2. Remove the restriction.
3. Change to an oil with a lower viscosity.
4. Change the air filter.
5. Replace the pump.
1. Replace the O-rings and tighten the
hose clips.
2. Replace the shaft seals.
3. Replace the plugs/fittings and
tighten carefully (15 Nm).
1. Replace the intermediate shaft.
2. Ensure that the spindle on the power
take off and pump shaft are parallel.
3. Rectify the intermediate shaft.
4. Loosen and turn the spline coupling
so that the universal joints are
aligned with each other.
Troubleshooting
Check whether the flow in the pressure
hose from the pump pulsates. Oil spots
on the pump and suction hose can
indicate an air leakage.
Check the oil level in the tank.
Check whether the oil foams.
Check whether the pump cavitates.
This is noticeable through flow pulsa-
tions and noise from the pump stopping
when the speed is lowered.
Run the pump unloaded at working
speed and measure the counter pres-
sure. Connect a pressure gauge to the
pressure hose close to the pump. The
pressure must not exceed 2 MPa.
Check whether the pressure rises to
the correct value when a function is run
towards the stop.
Check whether the pressure rises to
the correct value when a function is run
towards the stop.
Connect a flow meter close to the
pump. Check the flow.
1. The correct flow is obtained when
loaded.
2. Abnormally low flow obtained when
loaded.
1-5. Check whether the pump cavitates
This is indicated by the noise stop-
ping when the speed drops.
Check whether the noise propa-
gates in the hydraulic system.
6. Check whether the noise can be
heard at all speeds.
Localise the oil leakage.
Check whether the pump shakes,
despite the flow not pulsating, i.e. the
attachment does not jerk.
Fault
The equipment works
jerkily.
The equipment works
jerkily when starting and
at a high pump speed.
The oil has an abnormally
high temperature.
The equipment has a lack
of power.
The equipment runs
abnormally slowly when
loaded.
Noise from the pump.
Oil leakage from the
pump.
The pump shakes (inter-
mediate shaft assembly).
If oil leakage has occurred via a damaged shaft seal,
ensure that no hydraulic oil has entered the gearbox!

Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
7/8
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [email protected] Web: www.sunfab.com
Pump SCPD 56/26 DIN
Theoretical oil flow A+B
at pump speed
rpm
600
1000
1200
1500
1800
l/min
33.5 + 15.5 = 49
56.0 + 26.0 = 82
67.0 + 31.0 = 98
84.0 + 39.0 = 123
100.5 + 46.5 = 147
Displacement A+B cm
3
/rev
56.0 + 26.0
Max pump speed rpm 1850
Max working pressure bar 400
Weight kg 18
Tare-weight torque without valve Nm 21
Theoretical power at pressure and pump speed rpm
600
1200
1800
200 Bar
11.2 + 5.2 = 16.4 kW
22.4 + 10.4 = 32.8 kW
33.6 + 15.6 = 49.2 kW
300 Bar
16.8 + 7.8 = 24.6 kW
33.6 + 15.6 = 49.2 kW
50.4 + 23.4 = 73.8 kW
400 Bar
22.4 + 10.4 = 32.8 kW
44.8 + 20.8 = 65.6 kW
67.2 + 31.2 = 98.4 kW
Nominal torque on pump shaft
at different pressures
200 Bar
178 + 83 = 261 Nm
300 Bar
267 + 124 = 391 Nm
400 Bar
356 + 165 = 521 Nm
Direction of rotation Left (L) or Right (R)
3108GB1502 1.1 - Printed: 19/11/2015 16:03:14 - Page 3/4
SCPD 56/26 DIN
Technical data SCPD 56/26 DIN

Sunfab reserves the right to make changes in design and dimensions without notice. Printing and typesetting errors reserved.
© Copyright 2015 Sunfab Hydraulics AB. All Rights Reserved.
Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: [phone], Fax: [phone], E-mail: [e-mail] Web: www.sunfab.com
PUMP SCPD 56/26 DIN
7012EN3 REV 1.3
8/8
When the pump is running:
1. Do not touch the pressure hose
2. Watch out for rotating parts
3. The pump and hoses may be hot
WARNING