Graco PR70 To install a new Piston or Piston/Cylinder Replacement Kit, Nylon Pistons see Figure

Pistons & Metering Tubes

To install a new Piston or Piston/Cylinder Replacement Kit:

1. Drain the machine pistons by instigating several shots with either the tank ball valves closed (if

3.Remove the pump end caps (item 8 of figure 46) by removing the 4 end cap screws (item 6 of figure 46). Allow the cap to hang by the hose.

4.Remove the cylinder and Orings (items 1 and 6 of figure 50) from the pump housing (item 7 of figure 46) and pump cap.

5.Select an operating mode, then fully extend the pistons by activating the option in the M1 screen.

6.To prevent machine movement, press (red).

7.Remove the existing piston (1) and any front or rear washers (items 3 & 4 of figure 50) from the pump shaft (item 11 of figure 46) by removing the piston screw (2). A wrench will be required near the drive block to prevent the pump shaft from rotating while the screw is removed.

8.Install the new piston and any rear or front washers, by re-installing the piston screw into the pump shaft. When tightening the piston screw, tighten the screw until the piston stops rotating, then turn the screw an additional ¼ turn.

installed), or by activating enough shots to empty the tanks.

2. To prevent machine movement, press (red).

9.Select an operating mode, then retract the pistons by pressing in the M1 screen.

10.To prevent machine movement, press (red).

11.Lubricate the new o-rings with a high temperature grease, Graco P/N 115982 or equivalent. Place the lubricated o-rings into the inside circle placements in the pump housing and pump end caps.

12.Install the cylinder between the pump housing and end cap, then secure the cylinder and Orings by re-attaching the 4 end cap screws (item 6 of figure 46).

13.Open the tank ball valves (if installed) or put more material into the tanks.

14.Instigate several shot to fill the pump with new material.

15.Re-calibrate the machine, due to the procedure performed.

NYLON PISTONS (SEE FIGURE 50)

				Tube	Piston	Frt.	Back	Screw	O-ring
						Washer	Washer
Part No.	Rev.	Series	Area	Item 1	Item 2	Item 3	Item 4	Item 5	Item 6
LC1080	A	A	80	LCC080	LCB080	15M089	NOT REQ
LC1100	A	A	100	LCC100	LCB 100	15M089	NOT REQ
LC1120	A	A	120	LCC120	LCB 120	NOT REQ	NOT REQ
LC1140	A	A	140	LCC 140	LCB 140	NOT REQ	NOT REQ
LC1160	A	A	160	LCC 160	LCB 160	15M099	15K887
LC1180	A	A	180	LCC 180	LCB 180	15M099	15K887
LC1200	A	A	200	LCC 200	LCB 200	15M099	15K887
LC1220	A	A	220	LCC 220	LCB 220	15M099	15K887
LC1240	A	A	240	LCC 240	LCB 240	15M100	15K887
LC1260	A	A	260	LCC 260	LCB 260	15M100	15K887
LC1280	A	A	280	LCC 280	LCB 280	15M100	15K887
LC1300	A	A	300	LCC 300	LCB 300	15M100	15K887
LC1320	A	A	320	LCC 320	LCB 320	15M100	15K888	120933	120874
LC1360	A	A	360	LCC 360	LCB 360	15M100	15K888
LC1400	A	A	400	LCC 400	LCB 400	15M100	15K888
LC1440	A	A	440	LCC 440	LCB 440	15M100	15K888
LC1480	A	A	480	LCC 480	LCB 480	15M100	15K888
LC1520	A	A	520	LCC 520	LCB 520	15M100	15K888
LC1560	A	A	560	LCC 560	LCB 560	15M101	15K888
LC1600	A	A	600	LCC 600	LCB 600	15M101	15K888
LC1640	A	A	640	LCC 640	LCB 640	15M101	15K890
LC1720	A	A	720	LCC 720	LCB 720	15M101	15K890
LC1800	A	A	800	LCC 800	LCB 800	15M101	15K890
LC1880	A	A	880	LCC 880	LCB 880	15M101	15K890
LC1960	A	A	960	LCC 960	LCB 960	15M101	15K890

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