Graco B Series Instructions-Parts List Manual page 28

Drive Housing, Connecting Rod,
and Crankshaft
WARMING
Before doing this procedure, follow the Pressure
Relief Procedure Warning on page 2 to reduce
the risk of serious bodily injury, including fluid in-
jection or splashing in the eyes or on the skin, or
injury from moving part.
NOTE: See Fig. 24 for Steps
1 to 15
unless otherwise
noted.
NOTE: Stop the sprayer at the bottom of its stroke to
get the crank
(57)
in its lowest position. If the crank
must be lowered manually, carefully rotate the blades
of the fan with a screwdriver.
'
1.
2.
3.
Remove the displacement pump. See page
33.
or damage. Replace the rod, if necessary.
Remove the connecting rod (9). Inspect it for wear
Tum the displacement rod
so
the pin hole faces
straight back. Insert a hex key wrench through
the hole and unscrew the screw (8) located in the
back of the drive housing. See Fig. 23.
'W
See
procedure
Step 3
for
Fig. 23
olsm
4.
Remove the other two screws (8) and lock-
washers
(7)
from the top front of the drive housing
(6).
5.
6.
7.
8.
9.
10.
Remove the screws (12), spacers
(15),
screws
(I 6) and the motor cover (1).
holding the motor to the drive housing.
Remove the two screws (58) and lockwashers (7)
with a plastic mallet to loosen it from the front of
Lightly tap the lower rear of the drive housing (6)
the motor. Then pull the drive housing straight
off.
Inspect the drive housing (6) for excessive wear
and replace parts as needed.
Pull the crankshaft (57) out. Inspect it for wear or
thrust bearings (57a and 57b) are in the proper
damage and replace
it,
if necessary. Be sure the
place on crankshaft.
Evenly lubricate the inside of the bronze bearing
in the drive housing with high quality motor oil.
Liberally pack the roller bearing and gears with
bearing grease.
11. Carefully align the drive housing and front of the
motor with the locating pins. Push the drive hous-
tic mallet.
ing onto the motor, or tap it into place with a plas-
r C A U T ' O N
1
12.
Reinstall the motor cover (I), screws (16) and
screws (1 2) and spacers (I
5 ) .
align or seat the housing to the motor; doing so
DO
NOT use the drive housing screws (8) to try to
will not ensure proper alignment, but will cause
premature bearing wear.
13. Install the screws (8) and lockwashers (7) on the
bearing housing and tighten evenly.
14. See Installing the Pump on page 35.
15.
Reinstall the front cover and screws
(1 1,13).
Re-
connect the suction tube
(14)
and pump outlet
hose
(23).
28
307-889