308660
Rev. B
INSTRUCTIONS
INSTRUCTIONS
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
GM 3000
r
AIRLESS PAINT SPRAYERS
Drive Housing Replacement Kit 238691
Pinion Housing Replacement Kit 238684
Drive Housing, Connecting Rod, Crankshaft
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the
Pressure Relief
Procedure
on page 8.
Removal
1.
Relieve pressure.
2.
Remove the displacement pump. See page 7.
3.
Remove the pressure control (25). See page 3.
4.
Remove the three drive housing screws and lock
washers (15, 16). See Fig. 1 on page 2.
5.
Remove the two pinion housing screws (69) and
lock washers (16). See Fig. 1 on page 2.
6.
Tap the lower rear of the drive housing (6) with a
plastic mallet to loosen the drive housing. Pull the
drive housing straight off the pinion housing.
CAUTION
Do not allow the gear (19) to fall; it may stay at-
tached to the drive housing or to the pinion housing.
Do not lose the thrust balls (6a and 2d) or let them
fall between the gears, which will damage the drive
housing if not removed. If the balls are not in place,
the bearings will wear prematurely.
7.
Remove and inspect the crankshaft (8) and the
connecting rod (10).
Installation
8.
Lubricate the inside of the drive housing bronze
bearing with SAE non-detergent oil.
9.
Install the connecting rod.
10. Place the large washer (5) and then the small
washer (3) on the crankshaft (8).
11. Insert the crankshaft into the bearing in the drive
housing (6) and connecting rod (10).
12. If replacing the complete drive housing assembly
(6), brush bearing grease (supplied) on all gear
teeth. Then recoat the gear teeth with bearing
grease (supplied). Pack the remaining bearing
grease into the bottom part of the drive housing.
Use 3/4 tube of the grease. See Fig. 2.
13. Install gear (19).
14. Install new gasket (64).
15. Work backwards from step 5 to reassemble.
GRACO INC.
P.O. BOX 1441
MINNEAPOLIS, MN
55440–1441
E
COPYRIGHT 1996, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
