Graco D200 Repair Manual page 33

D200, D60, and S20 3 in. Ram Piston Rods
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 ram piston.
Disassemble Piston Rod Seal and Bearing
1. Relieve pressure.
2. Access piston rod seal and bearing.
a. For D200 3 in. Ram: Remove nuts (206) and
lockwashers (205) holding the tie bar (204) to
the piston rods (202n). Refer to parts illustration
on page 41. Remove nuts (105) and washers
(104). Remove tie bar (204). See page 41.
b. For D60 3 in. Ram: Ensure ram is in lowest
position. Remove nuts (383) and lockwashers
(382) from piston rods (302n). Remove entire
pump package, including the mounting plate
(381) off of the piston rods (302n). Secure pump
package so pump and platen will not fall. See
pages 46 and 48.
c. For S20 3 in. Ram: Ensure ram is in lowest
position. Remove nut (857) and lockwasher
(858) from piston rod (802n). Remove entire
pump package, including the mounting plate
(851) off of the piston rod (802n). Secure pump
package so pump and platen will not fall. See
page 51.
3. Remove retaining ring (203, 803).
4. Remove piston rod seal and bearing.
a. For D200 and D60 3 in. Rams: Slide end cap
(202a), pin (202b), o-ring (202c), and spring
(202m) up off of the piston rod (202n). Remove
retaining ring (202k) and bearing (202j) from
end cap (202a) and remove o-ring (202d).
b. For S20 3 in. Ram: Disassemble Ram Piston
to remove end cap (802a). See page 32. Slide
end cap (802a) off of the piston rod (802n).
Remove retaining ring (802k) and bearing (802j)
from end cap (802a). Remove seal (802d) and
spacer (802p) from bearing.
313527ZAD
5. Inspect parts for wear or damage. Replace as nec-
essary.
Do not reinstall end cap assembly if the ram piston
(202e, 802e) needs to be removed from the piston
rod. See the next page for ram piston repair instruc-
tions.
D200 and D60 3 in. Rams
202c
202a
202j
202m
202n
S20 3 in. Ram
803
802p
802d
802c
802a
802k
802n
F . 33: 3 in. Piston Rod Seal
IG
Repair
203
202d
202b
202k
802b
802j
802m
802b
33