Graco PR70e, Instructions Manual

Page: 35 / 70

Maintenance
334135B 35
Maintenance
Schedule
Clean the Pump Shafts
1. Close the vented ball valve at the left, rear of the
machine.
2. Press the Machine Disable Mode key ( ).
3. Push the piston block to the fully retracted position.
4. Clean both pump shafts with a compatible solvent
and lubricate with mesamoll, silicon oil, or other
compatible lubricant.
Disassemble and Clean the
Dispense Head
1. Relieve pressure. See Pressure Relief Procedure ,
page 33.
2. Remove the 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, sili-
con oil, or compatible lubricant.
6. Reassemble the dispense head.
7. Reinstall the dispense head on machine.
Action Schedule Procedure
Check Water/Air Separator
(Not provided) Daily before use 1. Check water/air separator for water.
2. Open valve at base of water/air separator to purge
water.
Check Desiccant Dryer (only
installed if chemical is moisture
sensitive) Daily before use 1. Check the color of the desiccant
2. Replace as required.
Check Tanks Daily before use 1. Check material levels and refill as necessary.
2. Verify the material reservoirs are vented properly.
Check Dispensing Ratio Daily before use or as
required See Phasing Adjustment page 29.
Clean Pump Shafts Daily after shutdown See Clean the Pump Shafts on this page.
Clean Dispense Head Daily See Shutdown on page 34.
Disassemble and Clean Dispense
Head As required See Disassemble and Clean the Dispense Head on
this page.
Upgrade LCM As required See Install Upgrade Token on page 36