Graco E-Flo Installation Manual page 56

Repair
OFF on the Ram Supply Unit that requires
repair only.
d. If using a heated Tandem Ram Supply System,
turn the red Disconnect Switch (AZ) OFF on the
Ram Supply Unit that requires repair only.
3. Remove nuts (123) and lockwashers (122) holding
the tie bar (219) to the piston rods (132). See page
61.
4. Remove nuts (303, 305) and washers (302, 304).
See parts illustration on page 67.
5. Lift tie bar (219) off rods.
6. Remove retaining ring (136) by gripping the ring tab
with a pair of pliers and rotating the ring out of its
groove.
7. Remove guide sleeve (135) and slide it off piston
rod (132).
Do not tilt the piston rod to one side when removing it
from the base or when installing it. Such movement
can damage the piston or inside surface of the base
cylinder.
8. Carefully lay piston (141) and rod (132) down so rod
will not be bent. Remove bottom retaining ring (138)
and o-ring (139). Remove piston guide band (140).
Slide piston (141) off piston rod (132).
139
137
141
140
F . 54: 6.5 in. Ram Piston
IG
56
NOTICE
132
138
TI10785A
Assemble Ram Piston
1. Install new o-rings (139, 137) on piston rod (132)
and piston (141). Lubricate the piston (141) and
o-rings (139, 137). Reinstall piston (141) and lower
retaining ring (138) onto piston rod (132). Install pis-
ton guide band (140) onto piston (141).
2. Carefully insert piston (141) into cylinder and push
rod (132) straight down into cylinder. Add three
ounces of lubricant to each cylinder after inserting
the piston (141).
3. Slide guide sleeve (135) onto piston rod (132).
4. Install retaining ring (134) and tie bar (219). Perform
steps to Disassemble Ram Piston in reverse
order.
D200 and D60 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. Follow the Pressure Relief Procedure on page 39.
2. Access piston rod seal and bearing.
a. For D200 3 in. Ram: Remove nuts (125) and
lockwashers (124) holding the tie bar (219) to
the piston rods (246). Remove nuts (305) and
washers (304). Remove tie bar (219). Refer to
parts illustration on page 63.
b. For D60 3 in. Ram: Ensure Ram is in lowest
position. Remove nuts (125) and lockwashers
(254) from piston rods (261). Remove entire
pump package, including the mounting plate
(259) off of the piston rods (261). Secure Pump
package so Pump (AC) and Platen (AD) will not
fall. See page 68.
3. Remove retaining ring (218).
4. Remove piston rod seal and bearing.
a. Slide end cap (241), pin (238), o-ring (245), and
spring (244) up off of the piston rod (261, 246).
Remove retaining ring (242) and bearing (243)
from end cap (241) and remove o-ring (240).
333586E