Maintenance. Graco 312065M - Reactor, Electric Proportioners, 312065P - Reactor, Electric Proportioners, 312065M, 312065N - Reactor, Electric Proportioners, 312065L Reactor, Electric Proportioners
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Maintenance
Maintenance
• Check wet cup TSL level daily.
• Do not overtighten packing nut/wet cup. Throat u-cup is not adjustable.
• Inspect fluid inlet strainer screens daily, see below.
• Grease circulation valves weekly with Fusion grease
(117773).
Fluid Inlet Strainer Screen
The inlet strainers filter out particles that can plug the pump inlet check valves. Inspect the screens daily as part of the startup routine, and clean as required.
Use clean chemicals and follow proper storage, transfer, and operating procedures, to minimize contamination of the A-side screen.
TI10955a
• Inspect ISO lubricant level and condition daily, see
page 38. Refill or replace as needed.
• Keep component A from exposure to moisture in atmosphere, to prevent crystallization.
• Clean gun mix chamber ports regularly. See gun manual.
• Clean gun check valve screens regularly. See gun manual.
• Use compressed air to prevent dust buildup on control boards, fan, motor (under shield), and hydraulic oil coolers.
• Keep vent holes on bottom of electrical cabinet open.
Clean the A-side screen only during daily startup.
This minimizes moisture contamination by immediately flushing out any isocyanate residue at the start of dispensing operations.
1.
Close the fluid inlet valve at the pump inlet and shut off the appropriate feed pump. This prevents material from being pumped while cleaning the screen.
2.
Place a container under the strainer manifold (59d) to catch fluid. Remove the strainer plug (59j).
3.
Remove the screen (59g) from the strainer manifold.
Thoroughly flush the screen with compatible solvent and shake it dry. Inspect the screen. If more than
25% of the mesh is blocked, replace the screen.
Inspect the gasket (59h) and replace as required.
4.
Ensure the pipe plug (59k) is screwed into the strainer plug (59j). Install the strainer plug with the screen (59g) and gasket (59h) in place and tighten.
Do not overtighten. Let the gasket make the seal.
5.
Open the fluid inlet valve, ensure that there are no leaks, and wipe the equipment clean. Proceed with operation.
312065P
F IG . 9. Fluid Inlet Strainer
59g*
59h
59j
59k
59d
Ti10974a
37
Maintenance
Pump Lubrication System
Check the condition of the ISO pump lubricant daily.
Change the lubricant if it becomes a gel, its color darkens, or it becomes diluted with isocyanate.
Gel formation is due to moisture absorption by the pump lubricant. The interval between changes depends on the environment in which the equipment is operating. The pump lubrication system minimizes exposure to moisture, but some contamination is still possible.
Lubricant discoloration is due to continual seepage of small amounts of isocyanate past the pump packings during operation. If the packings are operating properly, lubricant replacement due to discoloration should not be necessary more often than every 3 or 4 weeks.
To change pump lubricant:
1.
2.
Lift the lubricant reservoir (LR) out of the bracket
(RB) and remove the container from the cap. Holding the cap over a suitable container, remove the check valve and allow the lubricant to drain. Reattach the check valve to the inlet hose. See F IG . 10.
3.
Drain the reservoir and flush it with clean lubricant.
4.
When the reservoir is flushed clean, fill with fresh lubricant.
5.
Thread the reservoir onto the cap assembly and place it in the bracket.
6.
The lubrication system is ready for operation. No priming is required.
ST
LR
RT
LR
F IG . 10. Pump Lubrication System
TI10970a
ST
TI10969a
RT
RB
38 312065P

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