3
307282
Service
CAUTION
If the filter will not be used for a while, thoroughly
clean all the parts in solvent and blow them dry
before the paint dries and clogs the filter. To help
prevent damaging the parts, do not clean them with
a wire brush or sharp object.
Indicator
The indicator provides gradual warning of a dirty
element. When the indicator shows 3/4 red, clean the
element. If not cleaned promptly, the filter bypass valve
opens and fluid will not be filtered.
Replace the indicator assembly (1) if the indicator is
not working correctly (it is always red or never red).
See Fig. 3.
To convert to a CV75 o-ring for special applications/
fluid compatibility, unscrew the indicator (1), remove
the existing o-ring (1a), and replace with 551981 o-ring
(must be ordered separately).
Bypass Valve
The valve opens when a dirty element causes the
filter’s outlet pressure to drop 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.
Valve O-Ring
The o-ring seals the bowl (9) to the housing (3). If material
leaks around the bowl, replace the o-ring (6).
Remove the bowl and o-ring. Clean the parts in a
compatible solvent. Be careful not to damage the
o-ring or sealing surfaces of the bowl and housing.
Before assembling, lubricate the parts with No. 2
grease.
Bowl, Element and Spring
To reduce downtime, keep a spare bowl (9), element
(7) and spring (8) on hand. Before removing the bowl,
direct the fluid through the bypass pipes or shut down
the system. Relieve fluid pressure by opening the drain
valve (B).
Holding the bowl with a wrench to keep it from turning,
screw the drain plug (10) out. After the fluid has
drained out, remove the bowl, element and spring.
Replace immediately with the spare bowl, element and
spring to keep the paint from drying on the housing (3)
and other parts. Install the element with the dome end
up. Lubricate the threads of the bowl before screwing it
into the housing. Tighten it securely.
Clean the bowl, element and spring you removed with
a compatible solvent before the paint dries. Do not use
a wire brush or sharp object to clean. Store until
needed.
NOTE: Clean the filter element (7) with a small paint
brush. Blow out lodged particles with air, and inspect
for damage. Replace if ruptured.
1
2
03707
1
2
3
6
7
8
9
3/4” npt(f) Inlet and outlet
1/4 npt(f) drain port
1
2
Fig. 3
10
1a
