Tiffin Motorhomes WAYFARER 2017 Owner's Manual page 126

ROUTINE MAINTENANCE
Note 1: From the tire manufacturer's load and inflation tables or the sidewall of the tires mounted on
the motor home.
Note 2: If the motor home has duals, read dual capacity from the tire and multiply by 2 (two) to obtain
dual-assembly load-carrying capacity.
More detailed information can be found in the manufacturer's literature associated with the chassis
and/or the tires provided with the motorhome. For example, the attached illustrates the inflation
pressures for Michelin tires as a function of the loads per position for a specified speed of the
motorhome. You can determine the appropriate inflation pressures for each of the tires on the motor
home, as a function of the loads they are to carry on a trip. Whenever there is a significant change in the
loading regimen of the motorhome, it would be wise to re-calculate the load weights of the tires to
assure optimal use of the motorhome.
Frequency of Checking Tire Inflation Pressures
When you have determined the "correct" tire inflation pressures for each of the motorhome tires and
inflated the tires under "cold" conditions, meaning the tires haven't been driven for more than one mile,
then the air pressures in the tires should be periodically checked to make sure that they retain their
proper pressures. It is recommended that tire pressures be checked at least once a month, or
preferably, every two weeks, and before any major trip.
On long trips, the tires should be checked every "drive" morning. On short trips (a day or less), the tires
should be checked before one departs on the trip and again before one returns home.
Check tire pressures when they are "cold"; that is, the tires haven't been driven at all or, at most, less
than one mile before being measured. In this manner, the tire pressure has not been increased by the
heating associated with tire sidewall and tread flexure associated with traveling. If you check tires that
are warm or hot, remember that they will necessarily read higher than normal. Do not "bleed" these
tires down to the "cold pressure" readings, as they will probably then be underinflated when they are
actually cool.
Don't make any adjustments to tire pressures when the tires are warm or hot, if such can be avoided. To
make these tire-pressure measurements, it is recommended that you purchase a high-quality, truck-tire
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