Timpte Tender - Wheel Assemblies; Wheel Installation

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Date of Origin – 02/24/11
Updated – 02/03/20
WHEEL ASSEMBLIES
Inspect parts and components for damage. Replace any defective parts.
Use only correctly matched parts when assembling and installing wheels. Incorrect parts can result in separation of
the wheel components which can lead to an accident.
Assembling painted, dirty, or rusty components can prevent proper mating of parts. Make sure all mounting surfaces
are clean and free of rust, dirt, or excessive paint.
Make certain all tires are matched to the same rolling circumference per the tire manufacturer’s instructions. Do not
use tires that do not meet this criterion. Doing so may result in unstable operation that can signicantly reduce service
life.
All components must be correctly installed and fasteners tightened to the recommended torque to assure maximum
service life in accordance with the manufacturer’s instructions. Failure to do so may result in serious injury or death.
WHEEL INSTALLATION
Hub piloted disc wheels have stud holes that are drilled straight through the wheel. Pilot bosses machined on the hub
t tightly into the center of the disc wheel. This supplies the alignment of the wheel to hub. Hub Piloted wheels are
secured to the hub with anged nuts.
Installation of a Hub Piloted Wheel
1. Be sure not to mix Hub Piloted and Stud Piloted disc wheels.
2. Use the correct ange nuts to match your wheels. Failure to do so may lead to loose wheels which signi-
cantly reduce product life and may result in a crash. Before proceeding with the installation of the disc wheels
make certain that you are using the proper ange nuts. The Hub Piloted mounting uses M22 x 1.5mm pitch
metric thread series nuts. The stud standout should be at least 2.16”. All studs have right hand threads.
3. Rotate the hub so that one of the intermittent pilots is located at the top position.
4. Position the inner disc wheel over the studs and wheel pads being careful not to damage the stud threads or
the pilot diameter of the wheel. Make sure the disc wheel is at against the mounting surface and there is
clearance between the disc wheel taper and the brake drum.
5. Position the outer disc wheel over the studs and wheel pilot pads being careful not to damage the stud threads
or the pilot diameter of the wheel. Be sure the valve stems for both the inner and outer tires are accessible.
6. Install the ange nuts and tighten to 50 ft. lbs following the sequence shown. Note: On two piece ange nuts,
apply a drop of oil between the nut and washer. Make sure the ange washer is not seized to the nut. Do not
lubricate the mounting surface of the drum or wheel, or the stud threads.
7. Check both disc wheels for proper positioning on pilots and proper sealing against the drum/hub assembly. If
they are not, loosen the ange nuts and reposition the wheels.
8. Tighten the ange nuts to 450 to 500 ft. lbs. dry thread torque following the sequence below.
Recheck the torque after the rst 50 to 100 miles of service and at every pre-trip inspection.