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3A2798D 21
Assemble Piston Rod Seal and Bearing
See F
IG
. 18 on page 20.
1. Lubricate o-ring (302e) and bottom bearing (302k).
a. Install o-ring (302e), bottom bearing (302j), and
retaining ring (302l) into end cap (302b).
b. Install new o-ring (302d) and pin (302c) on end
cap (302b). Lubricate o-ring (302d) and end
cap (302b).
c. Slide spring (302m) and end cap (302b) on pis-
ton rod (302a).
2. Install retaining ring (303).
3. Remount mounting plate (331) and attach nuts
(333) and lockwashers (332). Torque to 40 ft-lb
(54 N•m).
Disassemble Ram Piston
1. Complete steps 1-4 from Disassemble Piston Rod
Seal and Bearing to remove the end cap (302b)
from the piston rod (302a).
2. Carefully lay piston (302f) and rod (302a) down so
piston rod will not be bent. Remove nut (302g),
washer (302h), piston (302f), outer o-ring (302d),
and inner o-ring (302j). See F
IG
. 19.
3. Inspect parts for wear or damage. Replace as nec-
essary.
Assemble Ram Piston
1. Install new o-rings (302d, 302j) and lubricate
piston (302f) and o-rings.
2. Apply medium strength thread sealant. Install
piston (302f), washer (302h), and nut (302g) on pis-
ton rod (302a).
3. Carefully insert piston (302f) into cylinder and push
piston rod (302a) straight down into cylinder.
4. Slide spring (302m) and end cap (302b) onto piston
rod (302a).
5. Install retaining ring (303).
6. Remount mounting plate (331) and attach nuts
(333) and lockwashers (332). Torque to 40 ft-lb
(54 N•m).
NOTICE
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.
F
IG
. 19: 3 in. Ram Piston
TI10521A
302a
302d
302f
302j
302h
302g