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 cap screws #212 from bottom of filter block.
2. Remove filter block #240.
3. Remove switch cover plate #56, located near pressure
switch and disconnect two red wires from motor starter
#54. See pg. 20.
4. Remove screw #27 from pressure switch adjustment
knob and slide knob off. See pg. 20.
5. Remove screw #27 located on side of motor housing
#31 and using a 1/8" allen wrench remove set screw
#57, until pressure switch #231 is able to slide down
through. Feed electrical wires down at the same time.
6. Insert new switch assembly #231 into housing while
carefully working the wires into the switch box. Using
needle nose pliers, reconnect wires to motor starter.
7. Making sure that the switch assembly is fully inserted,
tighten set screw #57 with a 1/8" allen wrench until the
switch assembly is secure. Reattach adjustment knob
#28. See pg. 20
8. Inspect O-Rings #232 and 233 on switch assembly. If
properly in place, then install filter block #240 by lining
up dowels. Secure with screws #212.
9. Install insulator plate #55 switch plate #56. See pg. 20
10.The pressure switch is factory calibrated so no
adjustment is required.
Service/Replacement of the
Pressure Relief Prime Valve
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 the Groove Pin (#226) from Bypass Valve
Handle (#227).
2. Remove Handle (#227) and Bypass Cam (#225).
3. Using a wrench, loosen Bypass Housing (#218) and
unscrew.
4. Unscrew Bypass Retainer (#224) and remove Bypass
Valve Stem (#220).
5. Inspect ball on end of Stem (#220) and O-Ring (#219).
Clean or replace if worn.
6. Screw completed assembly into Filter
Block except for items #225, 226 and 227. Tighten
securely with wrench.
7. Install Bypass Cam (#225) over Bypass Retainer
(#224), lubricate with grease. Line up Groove Pin
on Cam (#225) with hole on Filter Block (#207).
8. Using Groove Pin (#226) line up Stem (#220) with hole
on Handle (#227). Secure Handle with Groove Pin
(#226).
9. IMPORTANT: If Handle (#227) rotates 360° check Pin on
Cam (#225).
Service / 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 (#202).
2. Remove Filter Cartridge (#204). Clean or replace.
3. Inspect O-Ring (#206). Clean or replace.
4. Reattach Filter Housing (#202).
Gun 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 (†) filter into the head.
To reinstall left hand thread turn counterclockwise.
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.)
23
Figure 19
-- (†)For more detail, part number information
and assembly drawings at larger scale, please see the LX -
80 Professional Airless Gun Owner's Manual (#313-012).
