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Repair
ReassemblyReassembly
Reassembly
CleanClean
Clean
andand
and
InspectInspect
Inspect
AllAll
All
PartsParts
Parts
NOTICENOTICE
NOTICE
Use only genuine Graco replacement parts.
Non-standard parts will void your warranty and
may damage your equipment.
• Discard all used seals, gaskets and worn parts.
• Ensure that all new and existing parts are clean
and undamaged.
• Thoroughly clean all parts with a compatible
solvent and inspect for damage or wear. Replace
all gaskets, washers, worn parts and hardware as
necessary.
• Inspect the inner diameter of the pump roller. If the
surface has been worn, replace the roller.
• Inspect the bearings on the motor output shaft (2).
If the bearings are worn, replace the shaft.
• Inspect the shaft and bearing bore in the pump
housing (1). Ensure it is round, without grooves or
other signs of wear, and free of dirt, lings, or other
debris. A dirty or damaged bearing bore will greatly
reduce the life of the bearings.
• Inspect all metal parts for signs of wear or cracks.
Replace all worn parts.
NOTICENOTICE
NOTICE
The pump housing is aluminum. To help prevent
galling, blow out the threads with compressed air
before installing any ttings or fasteners.
InstallInstall
Install
thethe
the
MotorMotor
Motor
OutputOutput
Output
ShaftShaft
Shaft
1. Inspect the bearings and make sure that all rotate
freely and are seated against the shoulder of the
shaft (2). See Figure 6.
2. Coat the outer races of the shaft bearings and
the inner diameter of the bearing bore with light
lubricating oil. Make sure there is no dirt or debris
on either the bearings or the bearing bore.
3. Insert the shaft (2) into the pump housing (1) from
the front, making sure that the bearings engage
the bearing bore ush and straight. Tap the roller
end of the shaft with a rubber mallet until the
shaft is rmly seated in the pump housing.
NOTICENOTICE
NOTICE
Do not force the shaft and bearings into the
pump housing. This may cause damage to the
bearings or the housing.
4. Install the bearing retaining ring (3) in front of the
outer bearing.
InstallInstall
Install
thethe
the
SealsSeals
Seals
1. Press a new inner u-cup seal (5) onto the gearbox
end of the shaft (2) and into the bore at the rear
of the pump housing (1). The lips of the u-cup
must face into the pump housing. See Figure 7.
2. Grease the pump with NLGI #2 type grease.
Remove the plug (18) from the pump housing
and replace it with a zerk tting. Add grease until
it passes through the outer bearing of the shaft.
This provides a visual reference of the proper
amount of grease. Do not over-grease. Remove
the zerk tting and reinstall the plug (18).
3. Press a new outer u-cup seal (4) onto the pump
end of the shaft (2) and into the bore at the front
of the pump housing (1). The lips of the u-cup
must face toward the shaft bearings.
4. Make sure that the shaft rotates smoothly.
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