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8. Vertical check valve models: Remove the retaining
ring (25) that secures the delivery check valve assembly
in the end cover (6). Remove and separate the perforated
plate (26), spring (27), check valve body (28) and o-ring
(29).
9. Horizontal check valve models: Remove delivery
check valve plug (34) that secures the check valve
assembly in the end cover (6). Remove the spring (35),
check valve (36) and o-ring (2).
10. Remove the retaining ring (30) that secures the heater
and thermostat assembly (31) in the end cover (6). Gently
pull the heater and thermostat (31) out of the end cover
(6) and remove the o-ring (32).
11. Using a 9/16" wrench, remove the safety valve assembly
(33) from the end cover (6).
CLEANING & INSPECTION
1. Using mineral spirits or an equivalent solvent, clean and
thoroughly dry all metal parts except the desiccant
cartridge.
2. Inspect the interior and exterior of all metal parts that
will be reused for severe corrosion, pitting and cracks.
Superficial corrosion and or pitting on the exterior portion
of the end cover is acceptable.
3. Inspect the bores of both the end cover and the purge
valve housing for deep scuffing or gouges.
4. Make certain that all purge valve housing and end cover
passages are open and free of obstructions.
5. Inspect the pipe threads in the end cover. Make certain
they are clean and free of thread sealant.
6. Inspect the purge valve housing bore and seats for
excessive wear and scuffing.
7. Inspect the purge valve piston seat for excessive wear.
8. Make certain that the purge orifice in the cartridge bolt
is open and free of obstructions.
9. Inspect all air line fittings for corrosion. Clean all old
thread sealant from the pipe threads.
10. All o-rings removed should be discarded and replaced
with new o-rings provided in appropriate kit(s).
ASSEMBLY
Prior to assembly, coat all o-rings, o-ring grooves, and bores
with a generous amount of silicone grease. (Refer to Figures
9 and 10 during assembly unless otherwise advised.)
1. Install the quad ring (21) in its groove on the O.D. of the
purge piston (20). Place the return spring (22) in the
bore of the purge valve housing (19), then insert the purge
piston (20) into the I.D. of the spring (22).
2. Install and center the exhaust diaphragm (17) over the
shoulder bolt (16) making certain that the diaphragm ID
is over the bolt shoulder. Then install the purge valve
(18) on the shoulder bolt making certain its metal support
side is against the diaphragm (17).
3. Push the purge piston (20) into the housing (19) until it
bottoms and insert a large blade screw driver in the
piston's slotted head. While depressing the purge piston
with the screw driver, install the shoulder bolt (16) with
exhaust diaphragm (17) and purge valve (18) in the piston.
Torque the shoulder bolt (16) to between 60-80 in. lbs.
4. Install the two o-rings (23 & 24) on the purge valve housing
(19) placing each in its appropriate location. DLU models
do not contain o-ring (23). Install the assembled purge
valve housing in the end cover (6) while making certain
the purge valve housing is fully seated against the end
cover. Secure the purge valve housing in the end cover
using the retaining ring (14). Make certain the retaining
ring is fully seated in its groove in the end cover (6).
5. Using a 9/16" wrench, install the safety valve assembly
(33) into the end cover (6).
6. Vertical check valve models: Install the o-ring (29) on
the check valve body (28) and push the o-ring down,
over the 3 guide lands until it is in the o-ring groove of
the check valve body (28). Install the check valve spring
(27) on the check valve body so that the small coils of
the spring slip over the check valve body. Install the
assembled check valve body, o-ring, and spring (27, 28
& 29) in the end cover (6) so that the o-ring rests on its
seat in the end cover (6) and the spring is visible. Install
the perforated plate (26), in the end cover (6) and secure
the check valve assembly using the retaining ring (25).
Make certain the retaining ring is fully seated in its groove
in the end cover (6).
7. Horizontal check valve models: Install o-ring (2) onto
check valve (36). Place the check valve in the delivery
check valve port of the end cover (6). Install the spring
(35) over the delivery check valve (36) and secure with
the delivery check valve plug (34).
8. Install the o-ring (32) on the heater and thermostat
assembly (31). After making certain the sponge rubber
cushion is positioned between the connector body and
thermostat, gently push the heater and thermostat
assembly (31) into the end cover (6), making certain
the heating element enters the small diameter bore in
the larger heater and thermostat bore in the end cover
(6). Secure the heater and thermostat assembly in the
body using the retaining ring (30). Make certain the
retaining ring is fully seated in its groove in the end cover
(6).
9. Install both o-rings (12 & 13) on the desiccant cartridge
bolt (10) and using a twisting motion, insert the
assembled desiccant cartridge bolt in the end cover (6).
9
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