���
���
f
d
e
h
g
T
L
L
1
g
h
Maintenance and Servicing
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live electrical parts
the pump must be isolated by totally disconnecting the electrical supply. It is imperative that the unit cannot be re-started during
the maintenance operation.
Do not work on a pump that is at its normal operating temperature as there is a danger from hot parts or hot lubricant.
1. Air filtration (picture
���
)
The capacity of the pump can become reduced if the air inlet filters are not maintained correctly.
The filter cartridges (f) must be cleaned regularly depending upon the amount of contamination. Cleaning can be carried out by blowing out with
compressed air. Replace filters if contaminated completely.
The filter cartridges (f) can be removed from the filter housing by unscrewing the fixing knobs (g) and removing the filter cover (h) with gaskets (d /e).
Cleaning or replacing the filter cartridges (f). Re-assemble in reverse order.
2. Lubrication (pictures
���
and
���
)
Check the oil level regularly depending upon the operating hours. First oil change after 500 operating hours (see oil drain plug (K)). Further changes
every 500 - 2000 operating hours. The oil change times should be shortened if the application is dusty.
Only oils corresponding to DIN 51 506 group VC / VCL or a synthetic oil (obtainable from Rietschle) should be used. The viscosity must corre-
spond to ISO-VG 46 according to DIN 51 519.
The recommended Rietschle Oil types are: MULTI-LUBE 46 (mineral oil); SUPER-LUBE 46 (synthetic oil) (see oil type plate (M)).
When the oil is under a high thermal load, e.g. ambient or suction temperatures over 30°C, unfavourable cooling or operating with increased
speed etc., the oil change time can be extended by using the recommended synthetic oil.
Old and used oil must be disposed of corresponding with the relevant health, safety and environmental laws.
If the oil brand is changed, the old oil must be drained completely from the oil tank.
3. Oil separation (picture
���
)
Extremely blocked filter elements will result in an increased pump temperature and will cause discolouration of the lubricant.
The oil mist eliminator element may become contaminated after a long period of operation which can result in high pump temperature and motor
overload. We therefore recommend to change the oil separator element (L) every 3000 operating hours. It is not possible to clean these elements.
To change separator: Unscrew the fixing knobs (g). Remove the filter cover (h). Unsrew oil tank cover (T). Exchange the elements (L). If possible
re-use the o-ring (L
1
) for reassembly. Re-assemble in reverse order.
