GENERAL
M6040, M7040Narrow, WSM
NG-42
9. TIRES
• Do not attempt to mount a tire on a rim. This should be done by a qualified person with the proper
equipment.
• Always maintain the correct tire pressure. Do not inflate tires above the recommended pressure show in
the operator's manual.
• Do not use tires other than those approved by KUBOTA.
• Dual tires are not approved.
• When optional different-diameter tires are fitted on the machine, the travel speed display mode must be
changed. Otherwise the travel speed will not get correctly displayed. Such mode switching is also needed
when the original tires are back on the machine. (Refer to "4. CHECKING AND ADJUSTING" at "N9.
ELECTRICAL SYSTEM" section.)
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[1] TIRE SIZE AND INFLATION PRESSURE
• Excessive wear of tires may occur due to improper gear ratio.
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Through the tire pressure is factory-set to the prescribed level,
it naturally drops slowly in the course of time. Thus, check it every
day and inflate as necessary.
Recommended Inflation Pressure
• Maintain the pressure shown below for normal use.
• Maintain the maximum pressure in front tires, if using a
front loader of when equipped with lots of front weight.
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[2] TREAD ADJUSTMENT
• When working on slopes or when working with trailer, set the wheel tread as wide as practical for
maximum stability.
• Support tractor securely on stands before removing a wheel.
• Do not work under any hydraulically supported devices. They can settle, suddenly leak down, or be
accidentally lowered. If necessary to work under tractor or any machine elements for servicing or
adjustment, securely support them with stands or suitable blocking beforehand.
• Never operate tractor with a loose rim, wheel, or axle.
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Tire sizes Inflation pressure
Front
7.5-16 280 kPa (2.9 kgf/cm
2
, 41 psi)
7.5-18 225 kPa (3.3 kgf/cm
2
, 33 psi)
250 / 80-16 250 kPa (2.5 kgf/cm
2
, 36 psi)
250 / 80-18 250 kPa (2.5 kgf/cm
2
, 36 psi)
280 / 70R18 160 kPa (1.6 kgf/cm
2
, 23 psi)
Rear
12.4R24 160 kPa (1.6 kgf/cm
2
, 23 psi)
320 / 85R28 160 kPa (1.6 kgf/cm
2
, 23 psi)
380 / 70R24 120 kPa (1.2 kgf/cm
2
, 18 psi)
360 / 70R28 140 kPa (1.4 kgf/cm
2
, 20 psi)
380 / 70R28 120 kPa (1.2 kgf/cm
2
, 18 psi)
440 / 65R28 120 kPa (1.2 kgf/cm
2
, 18 psi)
(A) Insufficient
(B) Standard
(C) Excessive
(D) Ground