Repair

Reconnect Displacement Pump

CAUTION

Be sure to use at least two people when lifting, mov- ing, or connecting the pump. This pump is too heavy for one person. If you are connecting the displace- ment pump to a motor that is still mounted (for exam- ple, on a ram), be sure to support the displacement pump while it is being connected, to prevent it from falling and causing injury or property damage. Do this by securely bracing the displacement pump, or by having at least two people hold it while another con- nects it.

On Premier models, ensure that the rod adapter (6) has not loosened during maintenance. Proper

torque is necessary to prevent the rod adapter from loosening during the pump operation.

If the rod adapter (6) has loosened during mainte- nance, remove the adapter and apply Loctite 2760 (or equivalent) to the rod adapter and air motor pis- ton threads, and then torque to 230-250 ft-lbs (312-340 N•m).

1.If the air motor was removed, refer to the Supply Units Repair-Parts manual for installation instruc- tions.

2.Use caution when reconnecting displacement pump. Place displacement pump (2) on tie rods (3).

3.Screw nuts (5) onto tie rods (3) and torque to 50-60 ft-lb (68-81 N•m).

ti10511a

FIG. 19

4.Pumps with 100cc, 200cc, and 250cc displacement pumps only: Install coupling (7), and slide coupling cover (8) down. Install clip (9).

ti10509a

FIG. 20

5.Pumps with 60cc and 500cc displacement pumps only: Reinstall coupling nut and coupling covers on displacement rod. Slide coupling nut up and tighten using a torque wrench with a claw foot; see the fol- lowing table for torque values.

Displacement

 

Pump

Torque

 

 

60cc

75-80 ft-lbs (102-108 N•m)

 

 

500cc

230-250 ft-lbs (312-340 N•m)

 

 

ti10718a

FIG. 21

6.Reconnect all hoses. Reconnect ground wire and reed switch cable (units with remote DataTrak) if they were disconnected. Fill wet cup (R) 1/3 full of Graco Throat Seal Liquid or a compatible solvent.

7.Attach platen to displacement pump. Refer to the Supply Units Repair-Parts manual for instructions

8.Turn on the air power supply. Run the pump slowly to ensure that it is operating properly.

9.Allow 2 hours for the thread sealant to cure before returning the pump to service.

20

312376L

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Graco P20LCM, P39LCS, P40RCM important safety instructions Reconnect Displacement Pump, Displacement Pump Torque
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P40RCM, P39LCS, P20LCM specifications

Graco, a renowned brand in the world of fluid handling equipment, has developed a series of versatile and high-performance products tailored for various applications. Among these, the Graco P20LCM, P39LCS, and P40RCM stand out for their innovative features, technologies, and characteristics that enhance productivity and efficiency in professional environments.

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