Pressure Switch Replacement
WARNING: Before proceeding,
follow
the
Pressure
Relief Procedure
outlined
on
Page
5.
Additionally,
follow
all other
warnings
to
reduce
the
risk
of
an
injection
injury,
injury
from
moving
parts
or
electric
shock. Always unplug
the
sprayer before servicing!
1.
Remove outlet mounting bolt (#263) with a 5/8
..
open end
wrench and screws (#272) with a
3/16" allen wrench, from
the bottom of pump.
2.
Remove the Filter Block Assembly (#294) from pump.
3.
Remove Pressure Switch Screw (#27) and slide
Pressure Switch Knob (#28) off. (See Figure 6
on
page 20.)
4.
Remove Switch Cover Plate
(#61
),
then disconnect the
two
red
and white wires from posts 1 and 3 on Motor
Starter.
5.
Remove Screw (#94) located under On/Off Switch.
Insert
a 1/8" allen wrench into screw opening and/loosen
Set Screw
(#55) by turning wrench counterclockwise, until
clear of
Pressure Switch Cylinder.
6.
Unscrew Pressure Switch Screw (#27) and slide
Pressure Switch Knob (#28) off.
7.
Carefully slide Switch Assembly (#290) down through the
bottom of pump, feeding the wires as you go. Be careful
not
to
damage wires.
8.
Insert new Switch Assembly into housing while carefully
working the wires into the
Switch Box. Using needle nose
pliers, reconnect the wires.
9.
Making sure that the Switch Assembly
is
fully inserted,
tighten set screw (#55) with a
1/8" allen wrench until the
Switch Assembly
is
secure. Then install screw #94.
10. Inspect 0-Rings
(#291
& #292)
on
Switch Assembly
and #268
on
Outlet Manifold (#266).
If
properly
in
place,
then
install Filter Housing Assembly to pump by lining
up
dowels and fluid passageway. Secure with screws #272.
12.
Install Switch Plate (#56) and reinstall Pressure Switch
Knob (#28).
13. The Pressure Switch
is
Factory Calibrated
so
no
adjustment
is
required.
Service eplacement
of
the
Pressure Relief Prime Valve
WARNING: Before proceeding,
foliow
the
Pressure
Relief Procedure
outlined
on
Page
5.
Additionally,
follow
all other
warnings
to
reduce
the
risk
of
an
injection
injury,
injury
from
moving
parts
or
electric
shock. Always
unplug
the
sprayer
before
servicing!
1.
Remove the Groove
Pin
(#285) from Bypass Valve
Handle (#284).
Push out
Pin
as
shown
in
Figure
8.
2.
Remove Handle (#284) and Bypass Cam (#283).
3.
Using a wrench, loosen Bypass Housing (#277) and
unscrew.
Inspect 0-Rings #275 & #276.
4.
Unscrew Bypass Valve Retainer (#282) and remove
Bypass Valve
Stem (#279).
5.
Inspect ball
on
end of Stem (#279) and seat, located
in
the Bypass Housing (#277). Clean or replace
if
damaged.
Inspect
0-Ring #278.
6.
When reinstalling screw completed assembly into Filter
Block except for items #283, 284 and 285. Tighten securely
with wrench. Make sure that both washers
(#280) and
(#296) are
in
place.
23
7. Install Bypass Cam (#283) over Bypass Retainer {#282),
lubricate with grease. Line up Cam {#283) with Filter Block
(#262).
8.Using Groove
Pin, line up Stem (#279) with hold
on
Handle (#284). Secure Handle with Groove Pin (#285).
9.
IMPORTANT: If Handle (#284) rotates 360° check
Pin
on
Cam (#283).
Service I Replacement
of
Filter
WARNING: Before proceeding,
follow
the
Pressure
Relief Procedure
outlined
on
Page
5.
Additionally,
follow
all
other
warnings
to
reduce
the
risk
of
an
injection
injury,
injury
from
moving
parts
or
electric
shock.
Always
unplug
the
sprayer
before servicing!
PUMP FILTER
1.
Unscrew Filter Housing (#288).
2.
Unscrew Filter (#287) from Filter Block (#262), Left
Handed Thread, turn Filter (#287) clockwise to remove.
If
Filter breaks off
in
Housing, use a small wood screw
to
remove.
3.
Inspect Seal {#289). Clean or replace.
4.
Screw new or cleaned Filter
in
Filter Block.
Turn
counterclockwise.
5.
Reattach Filter Housing (#288).
un
Filter
WARNING:
Follow
all safety
precautions
as described
in
high
pressure
warning
section
before proceeding.
If
your
spray
gun
leaks
or
spits
at
the
tip
when
you
release
the
trigger,
the
needle
or
seat
is
dirty,
worn
or
damaged
and
must
be cleaned
or
replaced.
Replacement
or
Removal
of
Filter:
1.
First pull down
on
trigger safety guard and swing away
from handle.
2.
Unscrew handle from spray head.
3.
Unscrew left hand threaded* filter from spray head.
(*NOTE: Left handed thread requires turning the filter
clockwise to remove.)
4.
Screw new or cleaned
(t)
filter into the head. (To
reinstall left hand thread tum counter clockwise.)
5.
Reattach handle to head and secure safety trigger guard.
(NOTE:
If
filter breaks off in the head use a small wood
screw to remove.)
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Figure
9--
(t)For
more detail, part number
"'
\
information and assembly drawings at larger ' \ a
scale, please
see
the LX-80 Professional
\_
..
-'
Airless Gun Owners Manual (#313-012).
