Terex TR60 Maintenance Manual page 182

Rear Axle - Wheel, Rim and Tyre
Section 160-0050
and adjust the pressure with the tyre gauge in the
usual manner.
b. If the required service inflation pressure is greater
than 4.1 bar (60 lbf/in²), further inflate, with dry
nitrogen gas only, to the pressure level required.
Then remove the clip-on chuck and adjust the
pressure with the tyre gauge in the usual manner.
New Tyre Mounts and Remounts
To newly mount or remount a tyre to its rim, use only
dry nitrogen gas; this includes the pressure required
to seat the beads. After seating the tyre beads,
remove the clip-on chuck and adjust the pressure
with the tyre gauge in the usual manner.
Note: Although a little more nitrogen gas is used to
seat beads than that used for re-inflation of a
mounted tyre, refer to 'Re-inflation of a Mounted
Tyre', its cost is generally negligible in comparison to
the time and labour saving and, longer tyre life
achievable with the reduced oxygen content which
results.
HYDRAULIC BEAD BREAKING TOOL
The hydraulic bead breaking tool illustrated in Fig. 9
is specifically designed to break tyre beads on rusted
rims, and is available from your dealer. Refer to
Special Tools. It can be used on rims having pry bar
slots. The recommended procedure for using this tool
is described below.
1. Prepare the vehicle for dismounting the tyre by
following the necessary steps outlined under the
headings 'Preparation for Servicing' and 'Dismounting
Tyre from Rim'.
2. Before using the tool, make sure the tyre has been
completely deflated by removing the valve core.
Refer to the Warning under 'Preparation for
Servicing'. Tape valve threads to protect from
damage, leaving valve end open to avoid the
possibility of trapping air inside the tyre.
3. Place the lip of the hydraulic tool in one of four
breaking slots between the bead seat band and the
rim flange.
10
Fig. 9 - Typical Hydraulic Bead Breaking Tool
4. Adjust the locking screw to a position which will
hold the tool in a line perpendicular to the face of the
rim.
5. Close valve on the hydraulic pump and apply
pressure to take up the slack in the tool and rim
parts. This will cause the tool to tilt slightly
downward. Release pressure and adjust the screw
again so that the tool will be perpendicular to the rim
when under pressure.
6. Apply enough pressure to move the flange back
approximately 13 mm (0.5 in) and hold this distance
by dropping a nut, or similar object, in the space
between the flange and bead seat band.
7. Release pressure and move the tool about 300 mm
(12 in) around the rim in either direction. Insert lip of
tool between bead seat band and flange. Repeat
cycle until 3/4 of the rim circumference has been
covered. Apply pressure at this point until bead
breaks loose.
8. Remove lock ring, bead seat band and rim flange
as described previously in this section under
'Dismounting Tyre from Rim'.
9. After lock ring, bead seat band and rim flange have
been removed, inner bead must be broken loose by
following the procedure outlined for the outer bead,
(steps 3 through 7).
SM - 214
SM 1582 12-98