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Check tire inflation pressure while tires are cool, using accurate gauge with 10 kPa (0.1 bar) (1 psi) graduations.
NOTE:
Use a special air-water gauge and measure with valve stem at bottom, if tires contain liquid ballast.
Checking inflation pressure of inner tires is much easier if valve stems of inner and outer tires are aligned at the time the outer wheel is installed.
Correctly inflated radial tires will show sidewall deflection. This is normal and will not harm the tire.
Inflation pressures less than 83 kPa (0.8 bar) (12 psi) should be monitored frequently because of increased risk of low pressure air leaks.
NOTE:
Bead slip can be experienced in high-traction conditions when using single tires. Increasing inflation pressure will help, but will reduce traction.
Maximum tire pressure is specified on tire sidewall.
Determine correct tire pressure by weighing tractor using following procedure:
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Determine front axle weight with implement lowered
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Determine rear axle weight with implement raised
Set tire inflation pressures according to weight measured.
Ballasting and tire pressure may need to be adjusted when operating conditions change.
Use inflation tire charts on following pages.
NOTE:
If tractor is equipped with front-mounted implement, raise implement when determining front axle weight, and lower implement when determining rear axle weight. If tractor is
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equipped with front and rear-mounted implement, raise both implements.
IMPORTANT:
Inflation pressures exceeding heavy ballast guidelines of 145 lb/PTO-hp (66 kg/PTO-hp) are not recommended. Tractor efficiency will be decreased. Use duals or a larger rear tire size.
Managing Tire Inflation Pressures
IMPORTANT:
Integral implements transfer significant weight to rear axle. Include this added weight when determining correct inflation pressures.
Tractors operating with a loader should increase front tire pressure 30 kPa (0.3 bar) (4 psi) above listed values to compensate for weight transfer.
Tractors operating on steep side slopes or furrow plowing, should increase rear tire pressure 30 kPa (0.3 bar) (4 psi) above values listed for base pressures of 80 kPa (0.8 bar) (12 psi) and above, to compensate for lateral weight transfer. For base pressures below 80 kPa (0.8 bar) (12 psi), pressure should be increased by 30 %.
Tractors with heavy hitch-mounted implements require increased rear tire inflation pressure to carry increased weight during transport.
Reduce pressures to correct for towed implement operation.
Tractors with heavy hitch-mounted implements that require additional front weights to maintain steering stability, also require increased front tire inflation to carry increased weight.
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