Summit TX25H - Page 63

Wheels and Tires
- Work on hard ground and roads, towing etc. In this case there will be use of maximum pressure.
In general, tractor is considered for two types of work:
- Work on soft soil where maximum adhesion is needed. In this case there will be use of lowest pressure
compatible with the load carried.
On any tire there is some marking which represents its size & capacity e.g. tire marking is 8.3x20, 4 ply rating i.e. 8.3
inch is the section width, 20 inch is the bead diameter. Ply rating doesn’t show that the same no. of plies are inserted
in tire. It is only comparative measure of the load carrying capacity (L.C.C) of tire. As more ply rating shows more
L.C.C. at the same time as L.C.C. increase the shocks absorption capacity decreases.
Tires play vital role in transportation and agriculture operations. It is the most important factor in the efficient
performance of tractor it should be used only as per company recommendation. Here we will discuss only
pneumatic tires.
Load Carrying Capacity
1
3
6
2
7
5
4
Front 6.00-12 & 76 A6 881.85(400)
Rear 8.3-20 6PR & 96 A6 1543.24(710)
Tire
Combin
ation
Tire Dimensions
including load capacity
index and speed
category symbol
Axle Tire Load
rating per tire
pound(Kg)
Max.
permissible
vertical load
on
coupling point
pound(Kg)
Front 7-14 8 PR & 72 A6 1510.17(685)
Rear
8.3-24 & FARM 2000 8PR
2061.32(935)
Front 6.5/80-12 & 80 A6 1433(650)
Rear 280/70 R18 & 114 A8 2601.46(1180)
Front 23x8.5-12 & LG 306 TL 2116.44(960)
Rear 33x15.5-16.5 & LG 306 TL 3637.63(1650)
Front 25x8.50-14 (Lg306) 1653.47(750)
Rear 13.6x6 (Lg306) 2094.39(950)
Front 23x8.5-12 12 PR SPHD 1851.88(840)
Rear
33x15.5-16.5 12 PR SPHD
4299.02(1950)
546.75(248)
40-13
Front Goodyear R14 23x8.50-12 1230(560)
Rear Goodyear R14 12-16.5 2760(1250)