GA01201_1002 - 07/2005
22
Fig. 9 Oil change
Key to Fig. 9
1
Oil-fill plug
2
Oil-level mark maximum
3
Oil-level mark minimum
4
Oil-drain plug
1
2
3
4
Maintenance
5.1
Checking the Oil Level
During operation of the TRIVAC B the oil level must always remain between
marks (9/2) and (9/3) on the oil-level glass. The amount of oil must be
checked and topped up as required.
Fill in oil only after the pump has been switched off.
5.1.1
Checking the Condition of N 62 or
HE 200 Oil
The ageing process for the standard operating fluid N 62 respectively
HE 200 (see Section 1.2) will depend very much on the area of application
for the pump.
a) Visual check
Normally the oil is clear and transparent. If the oil darkens, it should be
changed.
b) Chemical check
The neutralisation number of N 62 oil is determined according to DIN
51558. If it exceeds 2, the oil should be changed.
c) Viscosity check
If the viscosity of N 62 at 25 °C exceeds a level of 240 mPas (20 % higher
than the viscosity of fresh oil) an oil change is recommended.
If gases or liquids dissolved in the oil result in a deterioration of the ultima-
te pressure, the oil can be degassed by allowing the pump to run for
approx. 30 min. with the intake port closed and the gas ballast valve open.
When wanting to check the oil, switch off the pump first and drain out from
the warm pump the required amount of oil through the oil drain (9/4) into a
beaker or similar.
Please note the safety information given in Section 5.2
Caution
Caution
