Graco HYDRA-SPRAY EH 333 Instructions-Parts List Manual page 7

i
FAN
GUARD
JUNCTION
SWITCH ARM
BOX
Fig 4
FLUID 1
RETURN
FILTER
MOUNTING r
ELr$;R-;
BOLTS !
1
,,
HYDRAULIC 1
(0.8
mm)
GAP
Clean sump of sediment and reassemble unit using a
new sump gasket. Pour hydraulic fluid back into sump
through fill hole strainer.
Replacing Hydraulic Pump
Unplug unit,
relieve pressure, take shield off and
disassemble unit as explained above.
Loosen the setscrew in coupling half and push coupling
against pump. See Fig 6. Take out the four mounting
bolts and washers and remove pump. Discard the o-ring
seals.
Remove the adjusting sprocket retaining nut and pull
sprocket off adjusting nut.
Apply a light grease to the o-rings and put them in place
on pump mounting. Put the coupling half on shaft of
new pump and leave it loose. See Fig 6.
0.31 in. (0.8 mm) clearance between them, then tighten
setscrew firmly. See Fig 5. Put the adjusting chain onto
sprocket, onto adjusting nut, then screw retaining nut
onto stud and tighten, until snug, then back off 1 I12 to
ll8turn.
COUPLER HALF
O-RING
Fig 6
Clean sump of sediment, reassemble unit and pour
hydraulic fluid into sump. Check fluid level and add fluid
as needed.
When ordering a replacement hydraulic pump, be very
careful to order by the correct part number. To be sure,
check the number stamped on the pump.
Electric Motor Wiring Diagram
NOTE: These unit are wired for 115 volt service.
They can be rewired for 230 volt service.
FROM
MOTOR
For 115V
SERVICE
For 23OV
SERVICE
Put pump into place on mounting carefully so you don't
disturb o-ring seals and screw the mounting bolts in
tightly. Push coupling half into other half until there is a
Fig 7
306-941 7