Service
3A3940A
7
Follow Pressure Relief Procedure, page 4 before ser-
vicing or replacing any component.
Indicator (1)
The indicator provides a gradual warning of a dirty ele-
ment.
Replace the indicator assembly (1) if the indicator is not
working correctly (it is either always red or never red).
Bypass Valve (2)
The valve opens when a dirty element causes the filter’s
outlet pressure to drop to 15 psi (1 bar) below the inlet
pressure. This keeps the system pressure steady and
prevents the element from collapsing.
Replace the bypass valve (2) if it is damaged or worn.
Fluoroelastomer O-Ring (6) and O-Ring
Backup (7)
The o-rings seal the bowl (10) to the housing (3). If
material leaks around the bowl, replace the o-ring (6)
and o-ring backup (7).
1.
Unscrew the bowl (10) and remove from housing
(3).
2.
Remove o-rings (6, 7).
3.
Clean parts in a compatible solvent. Be careful not
to damage the o-rings (6, 7) or sealing surfaces of
the bowl (10) and housing (3).
4.
Lubricate parts with No. 2 grease.
5.
Reassemble parts as shown in F
sure backup o-ring (7) is assembled with groove fac-
ing upward and bowl (10) is tightened securely in
housing (3).
Bowl (10), Element (8) and Spring (9)
When the indicator shows 3/4 red, clean the element. If
it is not cleaned promptly, the filter bypass valve opens
and fluid will not be filtered.
To reduce downtime, keep a spare bowl (10), element
(8) and spring (9) on hand.
1.
Before removing the bowl (10), direct the fluid
through the bypass pipes or shut down the system.
2.
Unscrew bowl (10), element (8) and remove from
housing.
3.
Remove spring (9) from housing (3).
4.
Install the spare spring (9).
5.
Install the spare element (8) with the dome end up.
6.
Lubricate the threads of the spare bowl (10) with No.
2 grease before screwing it into housing (3). Tighten
securely.
7.
Clean bowl (10) and spring (9), (removed in Steps 2
and 3) with compatible solvent. Do not use a wire
brush or sharp object to clean. Store parts until
needed.
8.
Clean element (8) with a small, soft brush like a
paint brush. Blow out lodged particles with air.
Inspect element for damage. Discard element if it is
ruptured, damaged or too dirty to clean.
