Pierce Enforcer, Operator'S Manual

Page: 164 / 196

MAINTENANCE
6-42 / Wheels and Tires
© 2018 Pierce Manufacturing Inc. All Rights Reserved.
6-27.3b Michelin Fire-Service Rating Rules
After driving for 1 hour at speeds above the standard maximum rated speeds, or at loads over the maximum side-
wall rating, park the apparatus for 1 hour to allow the tire carcass to cool.
6-27.4 Tire Inflation
Guidelines provided are based on tires that are inflated to the correct pressure. Proper tire pressure is always
important, but it is critically important if tires are being employed in fire-service rated conditions.
Maintain tire pressure at the tire manufacturer’s pressure recommendations for the correct tire size,
type, load range (ply rating), and measured in-service axle load of the vehicle. Failure to maintain
proper tire pressure may result in loss of vehicle control, property damage, personal injury, or death.
Consult tire manufacturer’s load and inflation tables for proper inflation pressures at a given in-service
axle weight. Maximum inflation pressures, either published or special fire service recommendations,
are only to be used on axles at or near the maximum rated capacity. Also follow the load and inflation
tables for axles at less than maximum capacity.
The maximum tire pressure may be limited by the tire capacity (as stated on the side wall) or by the
wheel capacity. Do not assume that the tire can be safely operated at the maximum pressure as stated
on the sidewall since the wheel may be the limiting factor. Refer to the maximum tire pressure listed on
the yellow Federal Motor Vehicle Safety Standard (FMVSS) information decal, located in the cab, for
maximum tire pressure ratings.