Yanmar SA Series - TIRES, WHEELS AND WEIGHTS; Tire Specifications and Pressure

12-1
12. TIRES, WHEELS AND WEIGHTS
SA221/324/424 Operation Manual
12. TIRES, WHEELS AND WEIGHTS
● 3 tire sizes are provided for the front wheels.
● Another 3 tire sizes are provided for the rear
wheels.
● The recommended tire air pressures for these tires
are as specified in the table above.
● The tire air pressure gradually decreases as the
tires are used and as time elapses.
● Check the tire air pressure before starting the
day's operation.
● Avoid mounting a tire on a rim by an
unauthorized person.
● Always have an authorized professional with
the proper equipment mount the tire on the
rim.
● Never weld or heat a wheel and fire assembly.
● Always inflate tires to the correct tire air
pressure.
● Avoid exceeding the recommended tire air
pressure specified in the Operation Manual.
● Always keep the tractor securely supported
while:
• changing the wheels
• adjusting the tire tread width
● Always keep the wheel bolts tightened to the
specified torque.
● Avoid operating the tractor with loose
wheels, rims, weights and axles.
! WARNING
1. Tires
Avoid injury!
● Avoid mounting a tire on a rim by an
unauthorized person.
● Always have an authorized professional with
the proper equipment mount the tire on the
rim.
● Always inflate tires to the correct tire air
pressure.
● Avoid exceeding the recommended tire air
pressure specified in the Operation Manual.
IMPORTANT
● Only use the tires approved by Yanmar tractor
dealers.
● Always install the same tires types in the front
wheels and the rear wheels (e.g., R3 front and
R3 rear, or R4 front and R4 rear).
Model Tire Size
Tire Air
Pressure
PSI (MPa)
SA221
Front
R3
18 x 8.50-10 4PR 22 (0.15)
Rear 26 x 12.0-12 4PR 20 (0.14)
Front
R4
18 x 8.50-10 6PR 22 (0.15)
Rear 26 x 12.0-12 4PR 20 (0.14)
SA324
Front
R3
23 x 8.50-12 4PR 22 (0.15)
Rear 33 x 12.5-16.5 4PR 35 (0.24)
Front
R4
23 x 8.50-12 4PR 35 (0.24)
Rear 12-16.5 6PR 50 (0.34)
SA424
Front
R3
23 x 8.50-12 4PR 22 (0.15)
Rear 36 x 13.50-15 4PR 20 (0.14)
Front
R4
23 x 8.50-12 4PR 35 (0.24)
Rear 14-17.5 4PR 30 (0.21)
! WARNING
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