4
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Bosch Rexroth Corp.
Industrial Hydraulics
RA 17 041-DT4SM/06.09
Service Manual for CDT4-CDG4
2. Install the split wear bands (item 19h) onto the piston in the
outer grooves.
End Cap Seal Installation:
1. Install the backup ring (item 19f) by pulling it over the face lip
(head and cap ends). Be sure the groove of the backup ring is
facing forward (barrel side). Do not drag the o-ring (item 19e)
over the face, this will twist the o-ring; rather, pull the o-ring over
the face lip, making sure it is against the groove of the backup
ring.
2. Lubricate the chamfer ends and ID of the tube. Line up the
cap end to be perpendicular with the tube. A twisting movement
might be necessary to seat the cap end against the tube. Cau-
tion must be taken not to cut the o-ring.
3. Lubricate the piston seal and guide rings. Install the piston
and rod assembly into the tube by applying force to the end of
the piston rod. With the aid of a ring compressor, this will allow
the rod assembly to seat itself into the cylinder tube.
4. After the piston and rod assembly is completely bottomed
against the cap end, lubricate the top of the piston rod wrench
fl ats. This will assist in installing the head end. Make sure the
cylinder head and piston rod are perpendicular to one another.
Place your hands on top of the head and push downwards in a
twisting motion. A small rubber mallet may be needed to assist
during installation. Caution must be taken not to tear any seals.
Seat the head end into the tube using the same process as seat-
ing the cap end.
CAUTION:
KEEP FINGERS CLEAR BETWEEN HEAD AND TUBE
DURING INSTALLATION.
5. Install the tie rods and tighten the tie rod nuts in an X pattern
to avoid uneven loading. All threads must be torqued to the
required specifi cation in order to ensure functional reliability of
the cylinder. For exact torque measurements, see the table on
page 3.
Seal Replacement - continued
Courtesy
of
CMA/Flodyne/Hydradyne
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