Parker Series V14 - Page 9

9
Parker Hannin
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 (g. 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 lled with uid to at least
50%.
Hydraulic uids
Ratings and performance data for series
V14 motors are valid when a good quality,
contamination-free, petroleum-based uid is
used in the hydraulic system.
Hydraulic uids type HLP (DIN 51524),
automatic transmission uids type A, or API
CD engine oils can be used.
Fire resistant uids, when used under mo-
died operating conditions, and synthetic
uids 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 Hannin, Pump and Motor Div.) pro-
vide additional information about:
- Hydraulic uid specications
- Fire resistant uids
Before start-up
Make sure the motor case as well as the
entire hydraulic system is lled with hydrau-
lic uid. The internal leakage, especially at
low operating pressures, is not sufcient to
provide lubrication at start-up.
Note:
A drain line spring loaded check valve (shown in
g. 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 ow
to reservoir
Drain port
To reservoir
Check
valve
To reservoir
Check valve
Check valve
Drain port