WIKA CPB5000HP - Handbuch (Seite 23)

Pressure Balance High-Pressure GB
CPB 5000 HP
WIKA Operating Instructions Pressure Balance High-Pressure Version 2.3 23
5.3 Changing the Hydraulic Oil .
The hydraulic oil should be changed whenever visible contamination is present.
5.3.1 Removing Hydraulic Oil .
Open the locking screw with the oil filling symbol on top of the basement
Siphon the oil out of the tank, for example, by using a suitable nozzle
Small amounts of oil residue additionally may be siphoned off from the openings of the piston and
test specimen receptacle with screwed-off piston/cylinder system and test specimen. For this
purpose, the spindle pump must be slowly turned in clockwise with the low-pressure and high-
pressure shut-off valves open.
Minute amounts of oil residue may remain in the piping
In case of severe contamination of the hydraulic oil, the complete cleaning of the
piping and of all media-contacted individual components of the basement in a
dismantled state may be advisable. This procedure may be performed by the
manufacturer only.
Waste oil must be disposed of according to legal requirements.
5.3.2 Filling in of Hydraulic Oil .
Open the high-pressure shut-off valve
Open the low-pressure shut-off valve
Turn in the spindle pump clockwise until it reaches the initial stop
Open the locking screw with the oil filling symbol on top of the basement
Fill in special oil (1 litre supplied, or available as accessory) via the tank opening, until the fill level
reaches the thread of the tank opening (approximately 250ml). The fill level must always be
observed.
Twist out the spindle pump counter-clockwise until it reaches the rear stop. The filling medium is
suctioned out of the tank into the system.
Close the tank opening with the locking screw
5.3.3 Venting of the System (after Complete Filling only) .
After initial filling, or after a complete oil change, air may be trapped in the system. The system should
be vented using the following procedure:
Open the high-pressure shut-off valve
Open the low-pressure shut-off valve
The piston/cylinder system and test specimen connections must be open
Twist out the spindle pump counter-clockwise until it reaches the rear stop.
Carefully pump using the initial pressure pump, while continuously observing the filling medium in
the open piston receptacle and test specimen connections. At this point, trapped air escapes
toward the exterior by means of the formation of bubbles. The initial pressure pump must be
actuated until air bubbles no longer appear.
Any oil escaping in the open piston receptacle and test specimen connections should be siphoned
off, for example, with a nozzle.