Supply Unit Repair - Graco D60 Operation

Repair

Supply Unit Repair

To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 14. Do not
use pressurized air to remove the guide sleeve or
the piston.
Always service both cylinders at the same time. When
you service the piston rod, always install new o-rings in
the piston rod seal and the ram piston.
Disassemble Piston Rod Seal and Bearing
1. Perform the Pressure Relief Procedure on page
14.
2. Disconnect power.
3. Remove the pump package. See Remove Driver
on page 35.
4. Access the piston rod seal and bearing.
a. Ensure the ram is in the lowest position.
Remove nuts (383) and lockwashers (382) from
the piston rods (302n). Remove the entire pump
package, including the mounting plate (381) off
of the piston rods (302n). Secure the pump
package so the pump and platen will not fall.
See pages 40 and 42.
5. Remove the retaining ring (203, 803).
6. Remove the piston rod seal and bearing.
a. Slide the end cap (202a), pin (202b), o-ring
(202c), and spring (202m) up and off of the pis-
ton rod (202n). Remove the retaining ring
(202k) and bearing (202j) from the end cap
(202a) and remove the o-ring (202d).
7. Inspect all parts for wear or damage. Replace as
necessary.
NOTE: Do not reinstall the end cap assembly if the ram
piston (202e, 802e) needs to be removed from the pis-
ton rod. See the next page for ram piston repair instruc-
tions.
36
202c
202a
202j
202m
202n
F . 48: 3 in. Piston Rod Seal
IG
203
202d
202b
202k
3A5379B