Benchmark BM3775 - Tire Air Pressure; Replacing Tires

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6. Replace with new nylon at gaskets, blade septa, and bolts. Make sure to
install the parts back in the reverse order of disassembly during assembly.
7. Use a torque wrench to tighten the blade bolts clockwise to ensure that the
bolts are in place.
6.4 TIRE AIR PRESSURE
WARNING!
Check the tire pressure carefully while inflating. Too much air in
the tire could cause the tire to burst, causing serious personal
injury.
Failure to maintain correct air pressure in the tires could cause
problems with mower operation and stability, causing serious
personal injury.
Check the air pressure in all tires before use. Improper air pressure will affect
handling, steering response, traction, tire life, level cutting, and operator comfort. Be
sure tires are inated to the pressure shown below.
Recommended pressure: 20 PSI (137.9 kpa)
NOTE
 Front tire size: 13 in
 Rear tire size: 16 in
 Tire pressure should only be measured or adjusted when tires are cold.
6.5 REPLACING TIRES
When tires are worn, the traction of the mower will be decreased, which increases
the chance of having an accident. Tires should be replaced when the depth on the
tread is 0.16 in. (4 mm or less, or any time there is damage to the tire. Always use
identical replacement tires. Using improper tires on the mower could cause loss
of control, which could cause serious personal injury. Have tires replaced by an
authorized service center or a qualied tire repair station.
NOTE
 If a leak or at tire occurs due to a puncture, the tire may be repaired
using a plugtype patch.
 If the damage is from a cut, or if the puncture cannot be repaired using
a plug, the tire should be replaced.
BM3775