Replacing Wipers - Graco UniDrum C59784 Instructions And Parts List

Switch Replacement
7. Install the new limit switch (305) on the limit bracket
(306) using the fasteners.
8. Reconnect the tubing for the limit switch.
9. Make sure that the limit switch roller is positioned in
the same location per the measurement in step 5.
10. Reinstall the cover on the control panel.
11. Reapply air to the control panel.
12. Perform the Daily System Startup procedure
provided by the integrator at the applicable Supply
Unit (LH or RH).
13. Verify that the limit switch operates correctly.
14. Return the system to previous operation settings.
Servicing the Pumps
When the Pumps and air motors require service, refer
to the applicable instruction manual for detailed
information. See Related Manuals, page 3.

Replacing Wipers

1. Perform the Fluid Pressure Relief Procedure on
page 27.
2. To replace worn or damaged wipers (412), raise the
Follower Plate (D) up out of the drum. Remove the
drum from the base. Wipe the fluid off the Follower
Plate (D).
Use a long-handled flat-bladed ice scraper if it is
necessary to scrape the bottom of the Follower
Plate (D). To avoid serious injury, do not put your
hands between the plate and the drum.
3. Separate the wiper joint (WJ) and bend back the
strapping (413a) covering the clamp setscrew
(413c). See Detail A of F
309169ZAF
. 19. Loosen the
IG
setscrew, pull the end of the strapping through the
clamp (413b) and remove the wiper.
4. Slide the strapping (413a) through the new wiper
(412). Slide the clamp (413b) onto the new
strapping and bend the strapping back
approximately 3 in. (76 mm). Insert the strapping
through the clamp a second time. See Detail B of
F . 19.
IG
5. Install the wipers on the Follower Plate (D). Position
the wipers so that the wiper joints (WJ) are 180°
apart.
NOTE: You will need the special banding tool (BT)
shown in Detail C of F . 19 to tighten the strapping.
IG
Order Part No. 168092 Banding Tool.
6. Grip the strapping (413a) with the bonding tool (BT)
as shown. With your thumb on the gripper lever
(GL), turn the tool handle (TH) clockwise to apply
tension.
NOTE: Be careful not to pull the cutting handle (CH)
until you are ready to cut the strapping in step 8.
7. Continue turning the tool handle until you see the
strapping stop moving through the clamp (413b).
Stop turning the handle.
8. Tighten the setscrew with a wrench (W). Pull the
cutting handle (CH) to cut. Remove the bonding
tool (BT). Bend the strapping back over the clamp
(413b).
9. Pound the wiper all the way around with a rubber
mallet until the wiper joints (WJ) are butted tightly
together.
10. Return the system to previous operation settings.
Refer to the Load Material procedure on page 24.
Ram Assembly Service
35