Maintenance
4990671000 February 2008
30
Opening the filter:
Warning!
Only open when the machine is stopped and
de-pressurized.
Slacken or unscrew the tapered handle or star handles
(7.1/2+3). With type SFA, turn the cover (7.1/1) about
15° counterclockwise out of straight pins. With type
SFD, simply lift up the cover.
Cleaning the filter
Caution!
Filter cover is under moderate spring tension
.
•
Wash out the filter housing with a cold cleaner.
•
If the filter insert is stainless steel mesh it can be
washed out with cold cleaner.
•
If the filter insert has a fine filter cartridge, it can be
blown out with a steam jet directed from the inside
to the outside. Inspect the fine filter cartridge for
damage. Replace damaged filter insert.
•
Inspect the round seal ring or seal for damage.
Replace damaged seal.
Make certain that dirt or cleaning residue does not en-
ter the pump when the filter housing is cleaned.
Assembling the filter
•
Install the filter cartridge.
•
Place the round seal ring/seal in the cover and fil-
ter cage (type SFD) (7.1/1). Install washers to the
tapered handles or star handles (7.1/2+3).
•
Push the cover (7.1/1) in the housing (with type
SFA; turn cover clockwise into the straight pins
(7.1/6)).
•
Tighten the cover with tapered handles or star han-
dles (7.1/2+3).
7.2.4
Vee belts and Vee belt tension
Remove the Vee belts and Vee belt/drive
guards only when the machine is stopped and
the vehicle engine is stopped.
Inspect the Vee belts and the Vee belt tension every
week and re-tension or replace the belts if necessary,
see installation section 4.
Always replace damaged Vee belts as a complete set
of length matched belts.
7.2.5
Non-return valve
The non-return valve needs maintenance every
3 months.
We recommend a first inspection after 300 operating
hours.
7.3
Lubrication
7.3.1
Antifriction bearings
The antifriction bearings of the liquid ring pump are
pre-lubrication with enough grease for 5,000 operating
hours.
The special lubricating grease ensures outstanding
wear protection, excellent resistance to water and de-
bris, good corrosion protection, good ageing resist-
ance and an especially high resistance to
tribocorrosion.
The grease is available from Gardner Denver in 400g
cartridges (Part No. TW53105000).
Work on the antifriction bearings must only be
carried out by trained personnel with knowl-
edge of the equipment and the potential risks.
The lubrication of the anti-friction bearings
must be replaced, at the latest, after 5,000
operating hours, or three years. Remove all old
lubricant and clean the bearings before filling
with new lubricant. Use only lubricant certified
by the manufacturer (GDD Part No.
TW53105000).
Remove the bearings and install new bearings
(GDD Part No. TW41123100) at the latest after
15,000 operating hours.
Fig. 7.1
Vacuum filters SFA and SFD
1
2
3
1
1
Cover
2
Tapered handle (type SFA)
3
Star handle (type SFD)
