Variable displacement pump
Series VP1-095 / -110
/
-130
Bulletin MSG30-8214-INST/UK
Installation information
5
Parker Hannifin
Pump & Motor Division Europe
Trollhättan, Sweden
VP1_095_below_tank_ny2.ai
Leif A./07-03-29
Start-up procedure
- Make sure the entire hydraulic system is
as clean as possible before filling it with a
recommended fluid.
- The pump must be filled with fluid and
then purged before start-up (fig. 6).
Please note, that purging should only be
performed when the pump is connected
to the reservoir and the entire system is
filled with hydraulic fluid.
- Air in the VP1 (or in the rest of the
hydraulic system) can cause excessive
noise and damage pump performance.
- When starting up the system, activate
high flow/low pressure in order to purge
the hydraulic system properly.
- As previously pointed out, a separate
drain line is required between control port
T and the reservoir (fig. 6).
- Do
not
install a suction filter in the inlet
line.
Fluids
Suitable fluids: Mineral based, hydraulic flu-
ids type HLP (DIN 51524), ATF (automatic
transmission fluids) and API/CD motor oils.
Fluid temperature
Main circuit: Max 75 °C.
Viscosity
Recommended viscosity: 20 – 30 mm
2
/s
(cSt).
Operating viscosity limits:
- Min 10 mm
2
/s; max 400 mm
2
/s
- At start-up: max 1000 mm
2
/s.
Filtration
- 25 µm (absolute) in clean environment
and/or low pressures (< 200 bar)
- 10 µm (absolute) in contaminated environ-
ment and/or high pressures (200 bar and
above).
- Fluid cleanliness should follow ISO stand-
ard 4406, code 20/18/13.
NOTE:
Before start-up, open the uppermost
purge plug and purge the pump.
After purging, make sure the plug is
tightened
but not to more than 30 Nm.
Inlet (suction)
line
Separate drain
line from con-
trol port T
Locate the drain line as far away
as possible from the inlet line
Separa
te drain
line from con
trol
port T
’Upper’
purge plug
Fig. 6. Purging the VP1-095 / -110 / -130 (right hand pumps shown)
’L
ower’
purge
plug
