User's Manual

Repair
3A0591U 21
Service Ram Pistons
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.
• Order Piston Repair Kit 24G853 for a stainless steel
ram. Parts are marked with a † in the illustrations
and parts list.
• Order Piston Repair Kit 24G854 for a carbon steel
ram. Parts are marked with an * in the illustrations
and parts list.
Disassemble Piston and Seal
1. Follow Pressure Relief Procedure, page 14.
2. Follow Disconnect Diaphragm Pump, page 20, or
Disconnect Piston Pump, page 20.
3. Remove nuts (117) and lock washers (116) holding
the tie bar (114) to the piston rods (102). Also
remove nuts (4) and washers (3) holding the tie bar
to the tie rods (2).
4. Stainless Steel Rams: Remove four screws (124)
and washers (123), then remove the piston cap
(120). Remove outer o-ring (121) and inner o-ring
(122) from piston cap.
5. Remove retaining ring (115).
6. Carefully pull the piston rod out of the top of the cyl-
inder.
7. Slide the piston seal housing (103) and spring (104)
up off of the piston rod (102). Remove outer o-ring
(105) and inner o-ring (106) from the piston seal
housing (103).
8. Remove retaining ring (112) and bearing (111) from
the piston seal housing (103).
NOTICE
Do not tilt the piston rod when removing it from the
base or when installing it. Such movement can damage
the piston or the inside surface of the base cylinder.
FIG. 7. Piston Rod Seal
124
123
120
121†
113
106*†
103
111†
112*†
104*†
122†
115*†
105*†
TI16472a
102