Graco EnergyComplete 313221H Instructions - Parts Manual page 38

Replace Function Knob/Potentiometer
1. See Before Beginning Repair, page 33. Relieve
pressure, page 21.
2. Remove access cover (8) from back of control mod-
ule.
3. Disconnect potentiometer wires from J2 on control
board (406). See F
IG
Detail of Function Knob/Potentiometer
415
N
P
TI7076a
416
416a
*402
*403
409
424
CS
FC
F . 11. Control Module
IG
38
. 12.
404
S
401
416a
421
CS
FC
410 410*
424
4. See F . 11. Remove two setscrews (416a) and pull
IG
function knob (416) off potentiometer (404) shaft.
5. Remove nut (N, part of 404) and detent plate (415).
6. Install new potentiometer (404) in reverse order.
Position potentiometer so slot (S) is horizontal. Posi-
tion knob (416) so pointer (P) faces up. Install knob
on shaft so slot (S) engages alignment pin in knob.
Push knob onto shaft against detent spring before
tightening setscrews (416a).
7. Reconnect potentiometer wires to J2 as shown in
F . 12.
IG
402
404
411
405
408
407
412
413
Repair
416a
416
416a
N
415
417
406
TI6979a
313221H