• ~°
<br />Miller Time =Maintenance Time .. .
<br />90 psi on both drive and steering ax-
<br />les. The tires are mounted and wheel
<br />nuts on aluminum disc wheels are
<br />torqued to 500 ft lbs for steering axle
<br />(dry) and 325 ft lbs for drive axles
<br />(lubricated).
<br />Miller's tire program is managed
<br />by fulltime tire superintendent Bill
<br />Davis. Almost all Miller tractors run
<br />on Michelin radial tires on Alcoa
<br />aluminum disc wheels. "The greatest
<br />thing we ever did was go to radial
<br />tires, and the next greatest thing was
<br />to low profiles," says Davis. He says
<br />the Michelin Pilote tires save weight
<br />and give longer service.
<br />Tires on Miller equipment are
<br />aired weekly. If a tire has a pressure
<br />of 75 psi or less, it is pulled to deter-
<br />mine what is causing the air loss.
<br />Davis makes regular inspections of
<br />terminals to ensure tire airing is be-
<br />ing performed. Miller uses air-
<br />through stem caps, but Davis does
<br />not recommend use of air-through
<br />caps unless a fleet has a strict weekly
<br />airing program. When tires are
<br />aired, the airing date is recorded
<br />with waterproof ink on a strip of
<br />tape affixed to the tractor or trailer,
<br />Taa Na
<br />M 38
<br />S[IIYICINO aENfONN[l MUfT INITiµ •RaYLtxd 5-10-Bt
<br />[ACM ITEM AnfNDED
<br />and the same date is recorded on a
<br />wall chart in the terminal shop.
<br />Tires are branded and a complete
<br />history is maintained on each tire.
<br />The history includes the tire's
<br />manufacturer serial number so it can
<br />be determined when the tire was
<br />made, should problems arise. Davis
<br />says such problems are rare. Miller
<br />runs recaps on tractor drives and on
<br />trailers. Recapping is performed by
<br />Mississippi Bandag.
<br />Tractor PMs
<br />Miller has three scheduled tractor
<br />preventive maintenance inspections.
<br />An "L" inspection is made at 7,500
<br />miles, and "LO" inspection at
<br />15,000 miles, and a "B" inspection at
<br />20,000 miles. The inspections are all
<br />conducted at the terminal level.
<br />Most repairs are also performed at
<br />the terminal.
<br />All failed components removed
<br />from tractors and trailers are in-
<br />spected at the central repair facility
<br />in Jackson. Bill Netherton explains
<br />there are a number of benefits to this
<br />practice. First, it enables the
<br />maintenance staff to make sure the
<br />MIIIER TRANSPORTERS. INC.
<br />-B- PM OPERATION
<br />•
<br />component has in fact failed. If the
<br />component is still usable, it is return-
<br />ed to service. Second, it allows staff
<br />to determine if the component can
<br />be repaired, and how it should be
<br />repaired. Finally, types of compo-
<br />nent failures sometime help pinpoint
<br />specific equipment or personnel
<br />problems.
<br />The L inspection at 7,500 miles
<br />can be completed in about one hour.
<br />The battery holddown, cover, latch-
<br />es and cables are checked. The bat-
<br />teries and box are washed. The en-
<br />tire brake system is checked for
<br />leaks. Blower air filter restriction in-
<br />dicators are checked. The chassis
<br />and U-joints are lubricated, as are
<br />cab hood, controls and seat. Lobe
<br />levels are checked in the transmis-
<br />sion, differentials, steering gear, and
<br />wheels. Coolant is checked and the
<br />oil filter is changed. Finally, the
<br />fifthwheel is lubricated, the whole
<br />tractor is checked for leaks, and the
<br />mechanic makes sure all grease and
<br />dirt has been wiped from seats,
<br />handles, steering wheel, etc.
<br />The LO inspection at 15,000 miles
<br />includes all checks from the L in-
<br />TRACTOR N0. - DATE
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<br />Miller's comprehensive "B" tractor inspection is performed at 20,000 miles.
<br />32 Modern Bulk Transporter
<br />
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