Servicing The Bearing Fluid Filter; Air Filter Maintenance - Sullair 20/12 Series Operator's Manual And Parts List

Section 6
MAINTENANCE
5. Scrape the old gasket material from the tank lid
mounting surface and the flanges mounting sur-
face on the tank. Be sure to keep all scrapings
from falling back inside of the tank.
6. Before installing the new separator element, make
sure to lubricate both sealing o--rings on the ele-
ment with a lubricating compound (i.e. Silglyde).
Now install the new separator element, the cover
plate, the new 1/4"--10 sealing hex nut, and the
1/4"--10 jam hex nut. Torque the sealing hex nut to
85 to 90 ft./lbs. (115 to 122 Nm). DO NOT over-
tighten, as damage to the separator element can
result.
7. Next, install the tank flange gasket that is pro-
vided. Before installing, lubricate both sides of the
gasket (i.e. Silglyde). Reinstall the tank lid. Install
the capscrews finger tight, then gradually tighten
in a crisscross pattern in 4 to 5 steps. Always tight-
en the capscrews alternately at opposite sides of
the cover. Lube torque capscrews to 200 ft./lbs.
(271Nm).
8. Clean or replace fluid return line strainer.
9. Clean the fluid return line orifice installed in the
side of the compressor unit air end.
10. After assembly is complete, check for continuity
between the separator flange and the lid and tank
flange with an ohmmeter.

SERVICING THE BEARING FLUID FILTER

Ref er t o F igur e 6 --
ment (P/N 250019--296) replacement is indicated by
the maintenance indicator located on the filter head,
use the following instructions.
1. When servicing is required, the compressor sys-
tem must be shutdown to be sure no positive pres-
sure remains on the lubricant in the filter.
2. To remove the canister, loosen band nut on the
band that holds canister to filter head, then gently
pull down canister. Filter element sits freely in
canister.
3. Remove filter element and gasket seal ring and
discard.
4. Install new fluid filter element in canister and install
the gasket seal ring to the canister flange.
5. Before reinstalling the canister to the filter head,
make sure mounting surface on filter head is clean
and free of dirt.
6. Apply a film of fluid to the gasket seal ring and then
install the canister to the filter head. Reinstall band
and tighten band nut to 200 in/lbs (271Nm).

AIR FILTER MAINTENANCE

Ref er t o F igur e 6 --
performed when air filter restriction gauge reads 20
inches water column. The air filter is equipped with a
primary element and a secondary element. As pre-
viously stated, the restriction indicator will alert you
as to when the primary element maintenance is nec-
essary. When removing the primary element, always
check the secondary element restriction indicator to
see if it shows red. The secondary element must be
replaced at this time. The secondary element must
22
2. W hen a need f or a f luid f ilt er ele-
3. A ir f ilt er m aint enanc e s hould be
Figure 6-2 Bearing Filter (P/N 250019-296)
* Element Repair Kit P/N 602568--001
changed after every sixth primary element cleaning.
However, the secondary element is designed for re-
placement only. DO NOT clean the secondary ele-
ment.
AIR FILTER ELEMENT REMOVAL
1. Clean exterior of air filter housing.
2. Remove the cover/element assembly by loosen-
ing the wingnut securing it.
3. Pull the cover/element assembly out of the hous-
ing.
4. On the inside of the element, you will notice a lock
ring which fastens the cover to the element. Re-
move the lock ring and pull the cover and element
apart.
5. Clean the interior of the housing by using a damp
cloth. DO NOT blow dirt with compressed air.
6. Inspect the secondary element and replace if nec-
essary. This element is NOT cleanable.
7. To remove the secondary element, unscrew the
secondary restriction indicator from the threaded
rod running through the element. Pull the element
out of the housing.