Graco Pneumatic PR70, Instructions Manual

Page: 17 / 34

Maintenance
313937A 17
Maintenance
Schedule
Clean the Pump Shafts
1. Press down air pressure relief switch at left, rear of
machine.
2. Turn Pump Mode switch to RETRACT.
3. Push piston block to fully retracted position.
Clean both pump shafts with solvent and lubricate with
mesamoll or silicon oil.
Disassemble and Clean the
Dispense Head
1. Relieve pressure. See Pressure Relief Procedure,
page 16.
2. Remove dispense head from machine.
3. Dismantle the dispense head. See MD2 Dispense
Valve manual referenced at the beginning of this
manual.
4. Clean all parts.
5. Lubricate all parts with a thin coat of mesamoll or
silicon oil.
6. Reassemble dispense head. See manual 312185
for details.
7. Reinstall dispense head on machine.
Action Schedule Procedure
Check Water/Air Separator Daily before use 1. Check water/air separator for water.
2. Open valve at base of water/air separator to purge
water.
Check Tanks Daily before use 1. Check material levels and refill as necessary.
2. Verify the material reservoirs are vented properly.
Clean Pump Shafts Daily after shutdown See Clean the Pump Shafts on this page
Clean Dispense Head Daily See Shutdown on page 16.
Disassemble and Clean Dispense
Head As required See Disassemble and Clean the Dispense Head on
this page