7032 SOUTH 196th - KENT, WA 98032 - (253) 872-0141 / FAX (253) 872-8710
OPERATION / MAINTENANCE MANUAL
MODEL 50 VIBRATORY HAMMER WITH MODEL 260 POWER UNIT
DIRECTION OF ROTATION
The F12 motor is bi-directional. The picture shows direction of flow vs.
shaft rotation. When fluid enters port PB (black arrow) the motor turns
counter clockwise, and when port PA is pressurized (open arrow) the
shaft turns counter clockwise.
The F12 pump rotates clockwise or counter clockwise. The ordering
code shows the direction of rotation.
FILTRATION
To obtain maximum motor service life, the fluid cleanliness should be
checked to meet ISO code 18/13 or better (ISO 4406). A10 um
(absolute) filter is recommended.
REQUIRED INLET PRESSURE
The motor sometimes operates as a pump (e.g. when it is used in a
propel transmission and the vehicle is going downhill). The motor inlet
port must then be supplied with sufficient fluid pressure, or increased
noise and deteriorating performance may otherwise be experienced.
CASE PRESSURE
The table shows the highest recommended case pressure (F12 shaft
seal type H) as a function of shaft speed.To obtain the longest seal
life, the case pressure should be limited to 50% or less of the figures
shown.
NOTE: Contact VOAC Hydraulics for information on other shaft
seals.
Motor case pressure [bar] vs. shaft speed [rpm]
designation 1500 3000 4000 5000 6000
F12-30 14.0 7.0 5.5 4.5 3.5
F12-40 12.0 6.0 4.5 3.5
F12-60 12.0 6.0 4.5 3.5
F12-80 10.0 5.0 4.0
F12-110
CASE DRAIN CONNECTIONS
There are two drain ports (PC and PD). The uppermost drain port
should be utilized. In mounting positions such as 'shaft up', a drain
line loop can be formed to provide bearing lubrication and cooling.
Preferably, the drain line should be connected directly to the tank to
avoid excessively high case pressure.
NOTE: When the motor is operating, the case must be filled with fluid
to at least 50%.
V. MAINTENANCE (Continued...)
V-8.
Hydraulic Motor - Installation and Start-Up. - Figure 5A.
Drain port PD
Drain port PC
Main port PA Main port PB
Clockwise rotation
Counter-
clockwise
rotation
OPERATING TEMPERATURE
The following temperatures should not exceed (type H seal):
System fluid: 80deg. C
Drain fluid: 100deg. C
Type V ('Viton') shaft seals can be used to 115deg. C.
Continuous operation may require case flushing in order to meet the
above viscosity and temperature limitations. The table shows operating
speeds, above which flushing is usually required, as well as suggested
flow through the case.
Motor Speed Flow
designation [rpm] [I/min]
F12-30 3500 4-8
F12-40 3000 5-10
F12-60 3000 7-14
F12-80 2500 8-16
F12-110 2300 9-18
BEFORE START-UP
Make sure the motor case as well as the entire hydraulic system is filled
with a recommended fluid. The internal leakage, especially at low
operating pressures, is not sufficient to provide lubrication at start-up.
HYDRAULIC FLUIDS
Ratings and performance data for series F12 are based on operating
with good quality, contamination-free petroleum-based fluids, Hydraulic
fluids type HLP (DIN 51524), automatic transmission fluids type A, or
API CD engine oils can be used.
At operating temperature, the viscosity (of the drain fluid) should
normally be kept above 8 mm2/s (cSt). At start-up, the viscosity should
not exceed 1000 mm2/s.
Fire resistant fluids, when used under modified operating conditions,
and synthetic fluids are also suitable. Contact VOAC Hydraulics for
further information.
Drain
Flushing
Page 5-6
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