© Titan Tool Inc. All rights reserved.
19
Before proceeding, follow the “Pressure Relief Procedure”
in the Operation section of this manual. 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!
Replacing the Clutch Rotor
1. Remove the four screws (54) that secure the engine
assembly.
2. Remove the engine assembly (refer to the Engine
Assembly parts list).
3. Remove the four screws (20) that secure the clutch rotor
(21).
4. Remove the clutch rotor (21).
5. To install the new clutch rotor (21), reverse the above
procedure.
Replacing the Pump ON/OFF Switch
1. Remove the four screws (40) that secure the pressure
control board (58) to the gear box housing. Remove the
pressure control board.
2. Disconnect the two black wires from the pump ON/OFF
switch (62).
3. Using a wrench, remove the rubber boot (64) and the
ON/OFF plate (63).
4. Remove the pump ON/OFF switch (62).
5. Install a new pump ON/OFF switch (62) and reattach the
ON/OFF plate (63) and rubber boot (64). Tighten
securely.
6. Reconnect the two black wires to the new pump ON/OFF
switch (62).
7. Reinstall the pressure control board (58) and secure in
position using the four screws (40).
Replacing/Servicing the Gear
1. Remove safety plate (70).
2. Remove the front plate (41).
3. Remove the four socket head screws (42) that secure the
pump housing (43) to the gear box housing (53).
4. Slide the pump housing (43) off the gear box housing
(53).
5. Inspect the gears beginning with the crankshaft (45),
followed by the output pinion gear (48).
6. Reassemble by reversing the above order. When
reassembling, make sure that all washers are in place and
that the gears and bearing are properly lubricated.
7. Grease the crankshaft (45) every 100 hours. The grease
fitting is located under the front plate (41).
8. Grease the crank and slide connecting rod assembly
every 100 hours (refer to the Fluid Section Assembly parts
list). The grease fitting is located on the crank and slide
connecting rod assembly under the front plate (41).
WARNING
Replacing the Pressure Switch
1. Remove the old pressure switch. Be sure all loose parts
are removed from the electrical box in the gear box
housing (53).
2. Install the transducer assembly (60) with o-rings in place.
Then, press the assembly securely into the filter block. It
is recommended that you replace the polyethylene gasket
that is between the pump and the filter block.
3. Reattach the filter block by guiding the transducer wires
through the bottom hole of the electrical box in the gear
box housing (53). Reinstall the two original bolts that
mount the filter block to the pump. Be sure to tighten
them evenly.
5. When installing the plastic potentiometer mount (66) from
the top of the electrical box, be sure the stop (raised
portion of the mount) is closest to the opening of the
electrical box. Square up the mount to the opening. Use
a rubber mallet to press the mount onto the pump, making
it flush. Use Loctite for mounting.
6. Put the potentiometer shaft (57) through the upper hole in
the electrical box, from the inside. The wires on the
potentiometer should come out of the box. Turn the
potentiometer clockwise or counterclockwise until it finds
the locating hole and stops turning. Install the seal tight
nut (56) onto the shaft of the potentiometer. Use needle
nose pliers to start the nut, and with a 1/2” socket 1/4”
drive, tighten to a torque of 4 in./lbs.
7. Turn the potentiometer shaft (57) clockwise until it stops.
8. Loosen the nut on the pressure control knob (27), and
install onto the shaft of the potentiometer (57) with the
pointer pointing away from the opening of the electrical
box.
9. Hand tighten the nut onto the pressure control knob (27)
and turn the knob clockwise until it hits the stop. With a
5/16” socket, tighten the nut onto the knob to 2 in./lbs.
Install the plastic cap (27) onto the top of the knob.
Electrical Schematic
TRANSDUCER
700-197
POTENTIOMETER
700-158
PRESSURE
CONTROL
BOARD
700-163
SWITCH
CLUTCH
MOTOR
CLUTCH
CLUTCH
SWITCH
J6
J7
WHITE
J3
J2
J5
J4
ELECTRICAL CONTROL ASSEMBLY
GAS UNIT - 690
ELECTRICAL
CONNECTOR
NOTE: Do not over-tighten the nut on the potentiometer.
