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Set-Up
Truing a tire is based on many factors. Some are simple, some may seem complex. Remember, all
you’re doing is making tires round.
A key factor to successful tire truing is trimming off as little tread as possible. Removing too much
can gouge a tire during truing. It can also unnecessarily decrease the tire life.
For accuracy and consistency start with a clean, level surface where access to an elevated vehicle
is possible.
General awareness: Keep the machine and it’s associated parts free from damage and abuse.
The first step to “True” a tire with a Portable Truer is to prepare the tires on a vehicle. Check tire air
pressure and fill to manufacturers recommendations.
Parked vehicles can develop a flat spot on the tires. DO NOT true a tire without warming the tires or
driving the vehicle to remove the flat spot. TSI recommends using our model 975 Tire Warmer for
this purpose, or driving the vehicle at least 4 miles before truing the tires. When done lift the vehicle
so wheels are off the ground. Support axles using jack stands or a car hoist as necessary.
Make sure the required electric power to unit is not restricted.
INTRODUCTION
Why “True” a tire?
Tire truing is performed to eliminate poorly balanced tires, wheel skip, reduces balancing weights,
cupping and extends tire life and performance. Tire truing reduces wear and tear on drive trains and
suspension systems. It’s particularly useful for tires on all wheel drive vehicles and low-profile tires.
The goal for Truing tires is to make tires more symmetrically round to increase their performance
and maintain a smoother ride in a vehicle. In general not all tires are round. Once you line up the
cutter blade on the Truer to your tire and spin the tire you’ll see how far out of round the tire is.
For TSI our goal is to create confident and knowledgeable Tire Truer operators. This instruction
guide is a first step toward achieving that goal while attaining your objectives to satisfy customers.
Fig. 2
KEEP MACHINE CLEAN
AND FREE OF DEBRIS
DO NOT WEAR
LOOSE CLOTHING
The Portable Truer
Move unit around with rear
handle or frame parts. Do not
move or reposition unit using the drive
screw handles, the top deck, tail section,
drive roller arm or cutter head assembly.
