Pump Assembly
To install a new Air Cylinder Kit:
1.Follow the Pressure Relief Procedure and turn off the machine.
2.Disconnect the airline, remove the PR70 Shroud, and remove the machine power entry assembly (item 3 or Figure 40) from the machine by removing the 2 attachment screws (4 of Figure 40).
3.Remove the 2 air valves (items 7 & 8) from the cylinder end block (18) by removing the 3 attachment screws (2).
4.Disconnect the air cylinder piston rod (20) from the machine drive block assembly (item 5 of Figure 39) by removing all hex nuts (item 3 of Figure 39) from the piston rod (additional nuts may be installed if the machine has a Hydracheck option). An
5.Disconnect the air cylinder from the machine frame base assembly (item 7 of Figure 39) by removing the 4 screws (item 8 of figure 39), which attach the cylinder rod end block (17) to the frame. Access the screw through the 4 holes in the blind end block (18) using a long allen wrench.
6.Remove the air cylinder by pulling on the cylinder from the back of the machine.
7.With the cylinder partially removed, disconnect the airlines at the air cylinder elbow fittings (12).
8.On a bench, disassemble the air cylinder by removing the 4 long screws (4), which connect the 2 cylinder blocks.
9.Inspect the cylinder tube (16) and piston (19) to verify no scratches exists. Replace if necessary.
10.Using a clean dry cloth, remove any existing grease from the inside of the tube (16), the outside of the piston (19) and the cylinder rod (20).
11.Remove the 2 cylinder block
12.Remove the cylinder rod from the rod end block, then remove the rod
13.Liberally apply Graco high temperature lubricant Grease (Graco P/N 115982) to the inside of the tube (16), the outside of the piston (19), all the
14.
torque the screws as specified in note 
of Figure 43 in a crisscross pattern.
NOTICE
In the previous step, air cylinder damage may result if screws are not installed in a crisscross pattern.
15.Air Cylinder damage may result if bolts are not installed in a crisscross pattern.
16.Reinsert the air cylinder into the back of the machine by inserting the cylinder rod through the hole in the base frame and in the drive block.
17.Before the cylinder is completely in place,
18.Reattach the cylinder to the base frame by reinstalling the 4 screws (item 8 of Figure 39).
19.Reattach the cylinder to the drive block by reinstalling the hex nut (item 3 of Figure 39) to the cylinder rod. Torque
the nut as specified in note 
of Figure 39.
20.Reattach the valves to the blind end block by reattaching the 3 screws (2).
21.Reattach the power entry assembly by reinstalling the 2 attachment screws (item 4 of Figure 40).
22.Reconnect input air into the machine. Operate the machine accordingly, and verify no air leaks are found. Recalibrate the machine.
Figure 44: PR70 Air Cylinder Rebuild Kits, 4.5” and 3.0” Diameter Versions (LC0092 & LC0091).
Key: |
|
|
|
|
|
|
|
(LC0092, 4.5” DIA. Rebuild Kit) |
| (LC0091, 3.0” DIA. Rebuild Kit) |
| ||||
Ref | P/N | Description | QTY | Ref | P/N | Description | QTY |
1 | 104131 | ORING, VIT, CDG | 1 | 1 | 120875 | ORING, VIT, CCE | 1 |
2 | 104271 | ORING, VIT, JDG | 2 | 2 | 120932 | ORING, VIT, JDA | 2 |
3 | 107571 | ORING, VIT, BAD | 1 | 3 | 107571 | ORING, VIT, BAD | 1 |
312393G | 34 of 50 |