Graco ULTRA 1000 Instructions-Parts List Manual page 28

BEARING HOUSING
CONNECTING ROD REPLACEMENT
(See Fig 23)
Before doing this procedure, follow the Pressure
Relief Procedure Warning on page 13 to reduce
the risk of an injection injury, injury from moving
1. Stop the sprayer at the bottom of its stroke to get
th. crank (El 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 screw (31,
32).
3.
Unscrew the suction tube
1421 from the pump,
holding a wrench on the pump intake valve to keep
the pump from loosening.
4. Disconnect the pump outlet hose
(901
from the
displacement pump outlet nipple
(46).
5. Use e screwdriver to push aside the retaining spring
the rear.
( 3 5 1
a t the top of the pump. Push the pin (201 out
6. Loosen the jam nut
(381
with an adjustable wrench.
Unscrew and remove the displacement pump.
7. Use a 3/16" hex key wrench to remove the four
screws
(331
and lockwashers
(491
from the bearing
housing.
8.
Lightly tap the lower rear of the bearing housing
housing. Then pull the bearing housing and the
(271 with a plastic mallet to loosen
it
from the drive
Connecting rod assembly
(291
straight off the drive
housing.
9. Inspect the crank (El for excessive wear and replace
parts as needed.
10. Evenly,lubricete 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 (291 with bearing grease.
"
11. Assemble the connecting rod (21) and bearing
housing (27).
12. Clean the mating surfaces of the bearing and drive
housings.
13. Align the. connecting rod with the crank
(El
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.
CAUTION
I
DO NOT use the bearing housing screws
(331
to
try to align or seat the bearing housing; the bear-
w i l l result in premature bearing wear.
ing end drive housing will not align properly and
14. Install the screws
(331
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 (271. Hold the pin
(201
up to the pin hole in the connecting rod assembly
pin slides easily into the hole. Back off the pump
(291
and continue screwing in the pump until the
until the top threads of the pump cylinder are flush
with the face of the bearing housing and the outlet
nipple
( 4 6 1
is facing back. Push the retaining spring
ing rod. Tighten the locknut (38) very tight-ebout
(351 into the groove ell the way around the connect-
Fig 23
75-85 ft-lb (102-115 N.m)-with a 2 in. open end
wrench end a light hammer. See Fig 24.
WARNING
Be sure the retaining spring
(351
is firmly in the
groove of the connecting rod, all tha way around,
to prevent the pin (201 from working loose 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 and result
in serious bodily injury or property damage, in-
bearing housina.
cluding damage to the pump, connecting rod or
16. Reinstall the front cover and screws (31,321. Recon-
nect the auction tube
(421
end DumD outlet hose
(471.
28
307-785