Graco ULTRA 1000 Instructions-Parts List Manual page 28

BEARING HOUSING 8 CONNECTING ROD REPLACEMENT
(See Fig 23)
1. Stop the sprayer at the bottom of its stroke
to
get
th. crank (E) in its lowest position. If the crank (E)
must be lowered manually, carefully rotate the
blades of the fan with a screwdriver.
2. Remove the front cover and screws (31, 32).
3. Unscrew the suction tube (42) from the pump,
the pump from loosening.
holding a wrench on the pump intake valve to keep
4. Disconnect the pump outlet hose (90) from the
displacement pump
outlet
nipple (46).
5. Use a screwdriver to push aside the retaining spring
the rear.
(35) at the top of the pump. Push the pin (20)-qut
6.
Loosen the jam nut
( 3 8 1
with an adjustable wrench.
Unscrew and remove the displacement pump.
7. Use
a
3/16' hex key wrench to remove the four
screws (33) and lockwashen (49) from the bearing
housing.
8. Lightly tap the lower rear of the bearing housing
(27) with a plastic mallet
to
loosen
it
from the drive
housing. Then pull the bearing housing and the
Connecting rod assembly
( 2 9 )
straight off the drive
housing.
9. Inspect the crank (E) for excessive wear and replace
parts as needed.
10. Evenly lubricate the inside of the bronze bearing in
the bearing housing with high quality motor ,oil.
Liberally pack the roller bearing in the connecting
rod assembly
(29)
with bearing grease.
11. Assemble the connecting rod (21) and bearing
housing (27).
12. Clean the meting surfaces of the bearing and drive
housings.
13. Align the connecting rod with the crank (E) and
with the holes in the front cover (31). Push the
carefully align the locating pins in the drive housing
bearing housing onto the drive housing or tap
it
into
place
with a
plastic mallet.
try to align or seat the bearing housing; the beer-
w i l l result in premature bearing wear.
ing and drive housing will not align properly and
14. Install the screws (33) and lockwashers (49) on the
bearing housing and tighten evenly.
15. Screw the displacement pump about 3/4 of the
way into the bearing housing (27). Hold the pin
(20)
up to the pin hole in the connecting rod assembly
(29) and continue screwing in the pump until the
pin slides easily into the hole. Back off the pump
until the top threads of the pump cylinder are flush
with the face of the bearing housing and the outlet
nipple (46) is facing back. Push the retaining spring
(35) into the groove all the way around the connect-
ing rod. Tighten the locknut (38) very tight-about
18-
I
7
Fig 24
wrench and e light hammer. See Fig 24.
75-85 ft-lb (102-115 Nm)-with a 2 in. open end
WARNING
groove of the connecting rod, all
the w a y
around,
Be sure the retaining spring (35) is firmly in the
to
prevent the pin
(201
from working loosa due to
vibration. See Fig 24.
If the pin works loose,
it
or other parts could break
off due to the force of the pumping action. These
parts could be projected through the air end result
in serious bodily injury or property damage, in-
cluding damage to the pump, connecting rod or
bearing housing.
16. Reinstall the front cover and s c m (31,321. Recon-
nect the suction tube
1 4 2 )
and pump outlet hose
(47).
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20
307-785