9
Parker Hannifin
Pump and Motor Division
Trollhättan, Sweden
Service Manual
Series V14
Bulletin HY30-5510-M1/UK
Drain ports
There are two drain ports on the V14; the
uppermost drain port should always be
utilized (fig. 3).
In order to avoid excessively high case
pressure, the drain line should be connec-
ted directly to the reservoir.
NOTE:
When the motor is operating, the
case must be filled with fluid to at least
50%.
Hydraulic fluids
Ratings and performance data for series
V14 motors are valid when a good quality,
contamination-free, petroleum-based fluid is
used in the hydraulic system.
Hydraulic fluids type HLP (DIN 51524),
automatic transmission fluids type A, or API
CD engine oils can be used.
Fire resistant fluids, when used under mo
-
dified operating conditions, and synthetic
fluids are also suitable.
When the hydraulic system has reached full
operating temperature, the motor drain oil
viscosity should be above 8 mm²/s (cSt).
At start-up, the viscosity should not exceed
1500 mm²/s.
The ideal operating range for the V14
series is 15 to 30 mm²/s.
The following information (available from
Parker Hannifin, Pump and Motor Div.) pro
-
vide additional information about:
- Hydraulic fluid specifications
- Fire resistant fluids
Before start-up
Make sure the motor case as well as the
entire hydraulic system is filled with hydrau
-
lic fluid. The internal leakage, especially at
low operating pressures, is not sufficient to
provide lubrication at start-up.
Note:
A drain line spring loaded check valve (shown in
fig. 2, 3 and 4) may have to be installed in order to
prevent oil from being siphoned out of the motor
case. This can otherwise happen e.g. if the reser-
voir is located below the utilized motor drain port.
Fig. 2.
Fig. 3.
Fig. 4.
Flushing valve
(optional)
Drain and
cooling flow
to reservoir
Drain port
To reservoir
Check
valve
To reservoir
Check valve
Check valve
Drain port