Tires

Tires

IMPORTANT!

1. Never exceed air pressure values in tires recommended by the manufacturer. 2. Never perform welding of disk or other kinds of repairs with tire inflated. To dismantle or repair tires address workshop with skilled personnel.

Tires used on the tractors 90/92

Tires

front

rear When mounting FDA 72 When mounting front axle Basic

11,2 – 20;

15,5R38 9,00 – 20; (9,00R20) 15,5R38

IMPORTANT! For tractors with FDA correct combination of front and rear tires should be used. Correct combination of front and rear tires provides maximum operation qualities of the tractor, increases tires' life and reduces wear of power gear components. The use of worn out and new tires, or tires with different diameter or rolling radius may result in violation of kinematical mismatch requirements and excessive wear of tires.

For normal tractor operation bring pressure in tires in accordance with given-below table. The pressure should be brought in “cold” tires. When operating with large draft forces bring pressure as for speed 30 km/h. When executing hauling operations on the roads with hard surface increase pressure by 30 MPa. When operating with front loader bring maximum pressure defined for the front tires.

Table of tire loads applied on tractors 90/92

Standard size of tire Load inde x Spe ed sym bol Volu me of filling liqui d, l Allowable load, kgf (N) at pressure, MPa

9,00-20 112 А6

0,08 0,1 0,12 0,14 0,16 0,18 0,2 0,22 0,24 0,26 0,28

- 640 715 780 840 900 960 1020 1070 1120 -

9,00R20 112 А8

580 640 715 780 840 900 960 1020 1070 1120 -

15,5R38 134 А8 250 1420 1620 1810 1975 2120 - - - - - -

11,2-20 114 А6

- 765 850 930 1000 1080 1145 1180 (2,1)

For tires with speed symbol A6 the loads are indicated for speed 30 km/h.

For tires with speed symbol А8 the loads are indicated for speed 40 km/h.

Table

Allowable change of load on guide and driving wheels' tires depending on speed

Speed, km/h Change of load, %, on guide wheels’ tires with speed symbol

10٭ 15 20 25 30 35 40 45 А6 (30 km/h) +50 +43 +35 +15 0 -10 -20 А8 (40 km/h) +67 +50 +39 +28 +11 +4 0 -7

٭ For tires with ply rating 6 and more internal pressure should be increased by 25%.

When using tires with ply rating 6 and more on front loaders, increase of load on tire is allowable up to 100% only in load mode.

Table

Speed, km/h Change of load, %, on driving wheels’ tires with speed symbol

10٭ 15 20 25 30 35 40 45 50 А6 (30 km/h) +40 +30 +20 +7 0 -10 -20 А8 (40 km/h) +50 +34 +23 +11 +7 +3 0 -4 -9

* Inside pressure should be increased by 25%. Short-term change of load (not more that 10% of total shift time) is allowed.

Note: Change of load depending on speed is used in cases, when tires are not loaded for prolonged time at high torque. During field works and under other conditions of prolonged operation at high torque, values that correspond to speed of 30 km/h are used.

When executing hauling operations on the roads with hard surface increase pressure by 30 kPa (0,3 kg/сm2)

When doubling wheels their total load capacity should not exceed the load capacity of single tire more than 1,7 times as much.

In the case of standard conditions bring minimum allowable pressure in tires for working with trailed machine.

When operating with mounted machine bring higher pressure in tires.

When using double wheels the pressure in external tire should be 1,2 – 1,25 times lower than the internal tire.

Allowable loads on front and rear axle

Tractor model:

90

92 Allowable loads, kN

On front axle On rear axle

17,5

24,0 50,0

50,0

Notes:

1. The loads on axles should not exceed the total load capacity of single tires of front and rear wheels.

2. When mounting track more than 1800 mm, the loads on axles should be reduced at 5% for every 100 mm of track increase.