Graco Hydra-Spray EH 433 GT Series Instructions-Parts List Manual page 19

Electric motor wiring diagram See Fig 13.
Model 226–433 and 231–004 are wired for 115 volt ser-
vice. It can be rewired for 230 volt service. Model
226–432 is wired for 220 volt service. Check your local
code before rewiring it for 110 volt service, which draws
22 amps.
FOR 115V SERVICE
(Models 226–433 and 231–004 only)
4
5 10
GREEN
WHITE
Fig 13
Replacing the hydraulic pump
1. Unplug the sprayer. Relieve pressure. Remove the
shield (119). Disassemble the sprayer as in ELEC-
TRIC MOTOR REPLACEMENT, page 18.
2. Loosen the setscrew in the coupling half (19). Push
the coupling against the hydraulic pump (64). See
Fig 12. Remove the four screws (1), the washers (5)
(see page 20) and the hydraulic pump. Discard the
o–ring seals. See Fig 14,15 and page 20.
3. Remove the adjusting sprocket retaining nut (29)
and pull the sprocket of f the adjusting nut. See Fig
14.
4. Apply light grease to the o–rings. Place the o–rings
on the pump mounting. Put the coupling half on the
shaft of the new pump and leave it loose. See Fig 14.
5. Carefully put the pump in place on the mounting so
you don't disturb the o–ring seals. Install the mount-
ing screws tightly. Push the coupling half into the oth-
er coupling half until there is a 0.31 in. (0.8 mm) clear-
ance between them, and then tighten the coupling
setscrew firmly. See Fig 14.
6. Put the adjusting chain onto the sprocket, then onto
the adjusting nut, and then screw the retaining nut
(29) onto the stud and tighten until snug. Finally, back
off the nut 1/12 to 1/8 turn. See Fig 14.
7. Clean the reservoir of sediment. Reassemble the
sprayer. Pour hydraulic fluid into the reservoir. Check
the fluid level and add fluid as necessary.
HYDRAULIC PUMP REPAIR
FOR 230V SERVICE
(Models 226–433 and 231–004 only)
3 9
9
GREEN
BLACK
WHITE
FOR 220V SERVICE
(Model 226–432 only)
4 10
3 5
BLACK
46
45
20
29
64
TIGHTEN SNUGLY AND THEN
BACK OFF 1/12 TO 1/8 TURN
Fig 14
O–RING
102–620
O–RING
104–130
Fig 15
10
4
9
GREEN
BROWN
BLUE
63
1/32"
(0.8 mm)
44 GAP
7
19
64
3 5
19