User's Manual

Repair

32 3A1602G

Replace Function

Knob/Potentiometer

1. See Before Beginning Repair, page 30. Relieve

pressure, page 20.

2. Insert pin through cart handle and lock with lanyard.

3. Carefully lay sprayer on its side on a level surface.

4. Carefully lay sprayer on it’s side on a level surface.

Rotate sprayer and rest upside down on cart handle.

NOTE: Always use two people when lifting the sprayer

up on to a workbench.

5. Remove four screws (10) and control board cover

(61) to expose the control board (12).

6. Disconnect potentiometer wires from J2 on control

board (12). See Fig 12.

7. See Fig 11. Remove two setscrews (16a) and pull

function knob (23) off potentiometer (16) shaft.

8. Remove nut (N, part of 16) and detent plate (22).

Remove potentiometer (16) and washer (87).

9. Install new potentiometer (16) in reverse order. Posi-

tion potentiometer so slot (S) is horizontal. Position

knob (16) so pointer (P) faces toward the top. Install

knob on shaft so slot (S) engages alignment pin in

knob. Push knob onto shaft against detent spring

before tightening setscrews (16a).

10. Reconnect potentiometer wires to J2 as shown in

Fig 12.

FIG. 55

ti17464a

FIG. 56. Function Knob/Potentiometer

ti17465a

16a