Graco PR70e, Instructions Manual

Page: 44 / 70

Repair
44 334135B
Rear Pump Rebuild Instructions
Prepare Machine for Kit Installation
1. Drain the pump. Empty the tanks. Perform shots
repeatedly until no material comes out of the dis-
pense valve.
2. Relieve pressure. See Pressure Relief Procedure ,
page 33.
3. Shut down the machine. See Shutdown , page 34.
4. Disconnect the pressurized air input hose.
5. Remove machine shield screws.
6. Remove the machine shield.
7. Disassemble the Rear Pump Assembly.
The pump shaft is installed coated with Krytox grease.
Wear protective gloves and cover exposed skin to
avoid possible skin irritation on contact. Read Krytox
MSDS to know the specifc hazards, and follow
manufacturer’s warnings.
F
IG
. 12
1
Torque to 350 in-lb (40 N•m).
Lubricate shaft with Krytox grease prior to insertion
into bearing.
Apply thread sealant to threads. Do not allow
thread sealant to get into seat area.
Piston shafts must be installed from this direction.
Damage to the shaft seal may result if installed from
the opposite direction.
Fasten in a crisscross pattern.
1
2
3
4
5
2
1
3
4
Rear Pump Assembly
5