Tyre Pressures And Permissible Loads (Radial Tyres) - New Holland T7030 Operator's Manual

TYRE PRESSURES AND PERMISSIBLE LOADS
(Radial tyres)
Radial tyre performance is denoted by a Load Index
and Speed Symbol replacing the Ply Rating
commonly found on cross ply tyres. Figure 234
shows typical markings to be found on the side wall
of radial ply tyres.
NOTE: Radial tyres will have a speed symbol of 'A8'
and/or 'B' which identifies the maximum speed rating
for that tyre. Tyres marked with the A8 symbol are
suitable for speeds up to 40km/h (25 MPH), those
marked with a 'B' symbol may be operated at speeds
of 50k/mh (31 MPH).
The maximum load that may be carried by the tyre is
dependent upon the Load Index shown on the side
wall. In the following charts the loads given are for
individual tyres operated at speeds up to 40 or 50 km/h
(25 or 31 MPH). The two right--hand columns indicate
the maximum permissible load per tyre at speeds of
40 or 50 km/h (25 or 31 MPH).
WARNING
When operating at high road speeds, tyre pressures
and maximum load capacities advised by the tyre
manufacturer should be strictly adhered to. Consult
your authorised dealer or tyre supplier for the correct
pressures and loads for the tyres fitted to your
tractor.
Tyre
Load
Size Size Index Inde
153A8 153A8
20.8R x 38 20 8R x 38
(150B)
155A8 155A8
580/70R38 580/70R38
(155B)
169A8 169A8
650/75R38 650/75R38
(169B)
171A8 171A8
710/70R38 710/70R38
(171B)
155A8 155A8
20 8R x 42 20.8R x 42
(152B)
158A8 158A8
18 4R x 46 18.4R x 46
(158B)
IMPORTANT: The above table provides an example of the maximum load limitations that occur at various tyre
pressures on a representative range of rear tyre sizes available for your tractor. These figures are per tyre and
should be used for guidance only. For exact information regarding inflation pressures and loads for your particular
tyres, consult your authorised dealer.
3--152
SECTION 3 - - FIELD OPERATIONS
1.0 1.2 1.4
Load Capacity per TYRE (kg) - - 30k/mh
- - -
- - -
3095 3355 3615 3875
3095 3355 3615 3875
3800 - 4250
3800 - 4250
4190 4560 4930 5300
4190 4560 4930 5300
- - -
- - -
2750 - 3470
2750 - 3470
141 A8
4
1. Load Index
2. Speed Symbol for 40 km/h (25 MPH)
3. Speed Symbol for 50 km/h (31 MPH)
4. Maximum load/inflation pressure at
40 km/h (25MPH)
5. Old ply rating mark
Inflation Pressure - - bar
1.6 1.8 2.0 2.2
- 2210 2410 2460
- 2430 2650 2900
- -
- -
- 4800 5200 5800
- 4800 5200 5800
5515 5725 5940
5515 5725 5940
- 2275 2550 2800
- 2500 2800 3075
- 4000 4120 4400
- 4000 4120 4400
1
2
3
MAX LOAD AT 40 KM/H
2575 KGS AT 1.6 BAR
REPLACES 10 P.R.
2.4 2.6 2.8
2865 3140 3350
3150 3450 3650
- - - -
- - - -
6200 - -
6200 - -
6150 - -
6150 - -
3050 3320 3550
3350 3650 3875
4500 - -
4500 - -
138
B
5
234
40 40 50 50
k/mh k/mh
3350 -
3650
3875 -
3875
6200 -
6200
6150 -
6150
3550 -
3875
4250 -
4250