Barko 830B, Service Manual

Page: 69 / 218

20-27
®
HYDRAULIC CYLINDER MAINTENANCE
8. Install new seals, ensure order is as shown in
Fig-2 .
Ÿ
Special pliers (part number 412-00409) can be
used to aid in assembly (see Fig-3) .
Ÿ
Install item BACK-UP RING before item ROD
SEAL on gland.
Ÿ
Heating BACK-UP RING, SEAL, and the stiff
portion of PISTON SEAL in a 200° oven for 5
minutes to make more pliable.
Ÿ
Some kits may contain extra seals.
Ÿ
When installing the WEAR RINGS (piston &
gland), put the cuts on opposite sides.
9. Start gland on rod and hammer on until it is past
the stub.
10.Slide piston onto stub, ensure O-RING (piston)
is on stub and piston is in proper orientation
(small recess is O-ring side, large recess is nut
side).
11.Tighten nut to torque listed in parts manual.
12.Oil new cylinder seals lightly before installing rod
assembly in cylinder barrel, oil barrel if
necessary.13.Reinstall gland cap, tighten bolts
in a cross
pattern to torque specified in parts manual.
14.Reinstall on machine and reattach hydraulics
lines.
CYLINDER SERVICING & RE-SEAILING (continued...)
Follow order and orientation of seals shown in Fig-
2 . The expansion ring on the ROD SEAL must point
towards pressurized end of cylinder with the BACK-
UP RING (gland) behind it. Depending upon
manufacture date, the SQUARE RING and the
SEAL (on gland) may be on either side of the
WEAR RINGS.
Fig-3
NOTICE
NOTICE
05/30/2019
Updated
SERVICE