Repair, Pump Removal, Proportioning Pumps

Repair

Proportioning Pumps

When the proportioning pumps are functioning properly, it is not unusual for a trace amount of resin or isocyanate chemical to seep past the pump packing onto the pump shaft. Maintain proper packing adjustment to minimize seepage. Routinely inspect the shaft and wipe away any residue when the unit is turned off. Disassemble and clean both proportioning pumps annually. Inspect the pistons and cylinders for marks or scratches, which may cause leakage or damage to packings. As a preventative maintenance precaution, it is recommended that the piston and cylinder packings be replaced during the annual cleaning. (Refer to page 16 of the Parts section for reference.)

Pump Removal

Air motor shaft, yoke, pump rod, and connecting rod move during operation. Moving parts can cause seri- ous injury such as pinching or amputation. Keep hands and fingers away from connecting rod during operation.

See manual 309577 for pump repair instructions.

1.Shut off Primary Heater Switch and Hose Heater Switch.

2.Perform Pressure Relief Procedure, page 5.

3.Perform Flushing, page 5.

4.Turn Main Disconnect Switch OFF and disconnect power supply.

5.Shut off both feed pumps and close both inlet supply valves (F).

TI9517a

6.Shut off air supply.

7.Disconnect fitting at inlet (Q) and outlet (M).

TI9519a

TI9509a

311327E

288400 specifications

The Graco 288400 is a versatile airless paint sprayer designed for both professional contractors and DIY enthusiasts. Renowned for its reliability and high performance, the Graco 288400 offers a seamless painting experience while ensuring superior finish quality.

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