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An Easy Method of

28th June 1935, Page 106
28th June 1935
Page 106
Page 107
Page 106, 28th June 1935 — An Easy Method of
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Which of the following most accurately describes the problem?

KEEPING TYRE RECORDS

A Recording System that Solves a Difficult Problem, Entails the Minimum of Effort and Minimizes the Possibility of Error

BOTH large and small operators who obtain their tyres from manufacturers . under mileage contract go to considerable expense in keeping records of the mileage run by these tyres, thus increasing the running costs of their vehicles.

The three most popular ways of tyre-mileage recording at present in use are as follow :—(l) Operators keep records and advise the tyre coin, panies of the mileage run by their tyres when they are returned to them as unfit for further service. By this system the tyre companies have no check themselves, and depend entirely on the correct tyre-mileage recording of the operator.

A Monthly Record.

. (2) Operators keep records of the mileage run by contract tyres and advise the tyre companies each month; from these particulars the tyre companies keep their records. When worn tyres are returned, the total mileage is stated by the operator, and this should agree with the mileage shown on the tyre companies' records.

(3) The third system is usually called the tyre-change method. By keeping a record of all tyre changes made, and the mileage run by the vehicle, it is possible to calculate the mileage accomplished by any tyre. The majority of operators and tyre companies use this system.

With systems 2 and 3, there is a duplication of record keeping, and with system 1 the tyre companies have no check on the mileage run by their tyres. Duplication was originally brought about by the tyre makers giving a rebate to the operators on all mileages over an agreed average, for, by keeping records, the operators were then in a position to check the rebate allowed.

Actually, it is the maker who is primarily concerned with the mileage run by his tyres, therefore he should

keep the mileage records, because from these records the maker ascertains if the tyres be making a profit and equalling the mileage run by those of competitors.

The recording system described below has been prepared to place the responsibility of record keeping on the tyre company, whilst enabling the vehicle operator to check the mileage of any tyre desired, eliminating, for him, the responsibility of tyre-mileage recordings. The system is suitable for either large or small operators.

On all large mileage contracts the tyre maker supplies a tyre fitter at his own expense, who works at the operator's garage servicing tyres and keeping records of all tyre changes. In the case of smaller operators, the work of the tyre fitter may be undertaken by one of the operator's own men, the cost being settled by the tyre concern by arrangement with the operator.

Little Clerical Work.

Briefly, the mileage-recording system detailed below is based on the tyre changes which take place, due to tyres being removed, worn out, damaged, etc. The only clerical work which the operator has to do is to furnish the tyre company with the mileage run by each vehicle during the month. From this monthly report the tyre maker invoices the operator for the miles run ; the number of tyres fitted to the vehicle can be ascertained by the tyre company from its records.

To distinguish the tyres supplied on mileage contract from those purchased in the . ordinary way, some mark is necessary, and for this purpose a number (2, for example) is branded on the side of the tyres supplied, i.e., tyre No. 2-1, tyre No. 27-2, tyre No. 2-3, etc. The figure 2 is the brand number and the other number is that of the tyre. Records of all the tyres supplied to the operator are kept by the tyre company.

This is done on vehicle-tyre-record cards and stock-record cards, one set 'being kept at the operator's garage and filled up by the tyre company's

fitter, and the other'set being looked after by the tyre cOmpany.

The work of . the tyre company's fitter at . the operator's garage is

to keep records in duplicateof

, all the tyre changes made • on the operator's vehicles, and; at the end of each month, to forward one copy to the tyre company, keep-, ing the other filed at the garage. He will also service vehicles, order and control stock, send the tyre company, at the end of each month, a list of all 'tyres being returned, with details of the tyres' last fittings (keeping a copy for his file), and keep the vehicletyre-record cards up to date.

The forms used for the tyre-change and tyre-return reports can easily be designed. When tyres are despatched from the works to the garage and _vice versa, two copies of the advice notes are sent, one being signed by -the receiver and returned to the

sender; thus the loss of tyres in transit is prevented.

Examples of vehicle-tyre-record cards and stock-record cards are reproduced. Mileage run can be calculated as follows :—Tyre No. 2-21 was returned to the maker with other worn tyres, and is shown on the tyre fitter's monthly list of tyres returned, the last fitment being on vehicle No. 259—NRO (near rear outer) position —on 27.9.34. To arrive at the mileage this tyre has run, trace it back from its last fitting position.

On vehicle 259 it ran 27 days of September, its mileage for that period being 1,818 miles (27 30 >< 2,020). On the same vehicle it was, before then, in the off-rear-outer position during August and July, covering 4,680 miles and 5,100 miles respectively. Prior to that it was on vehicle 260 from January 1 until June 30, covering 1,000 miles, 2,500 miles, 6,000 miles, 1,500 miles, 2,000 miles, 4;000 inileS during these and the 'intervening months taken in backward order, haying been new on'.. January 1. Thus its total mileage is seen to be 28,598.

For "another example, take tyre

No 'which is still in Service on the off-side front wheel of Vehicle No. 260. -In June and May it covered 1,000 miles and 2,500 miles, having been taken from stick on April 30. The stock-record card shows that it was taken from vehicle No. 260 on March 31. Referring again to this Vehicle's tyre-record card, it ia seen to have been in use On the Off-side front wheel during March, February and January, on the first day of which it was a new tyre. The mileages for these three months are shown as 1,500, 2,000 and 4,000 respectively, thus the total is 11,000 miles up to June 30; The vehicle-tyre-record cards for vehicles No. 260 and No. 259 show that, on No. 260, no tyre changes were made during May, the mileage run having been 2,500, and that on No. 259 there were no changes during July, the mileage in this case having been 5,100. All,ttyres were fitted to this vehicle on july 1.

Any number of tyre changes can be made during a month, but only two have been shown on the example. (See vehicle card 259, tyre changes 3.8.34 and 19.8.34.) To arrive at the mileage run by tyres fitted and removed between the beginning and the end of a month, it is necessary to divide the mileage run by the vehicle for the whole month by the number of days in that month, e.g., a tyre removed on the 17th of a 31-day month would have covered 17/31 of the month's total mileage. Similarly, a tyre fitted on the 20th of a 30-day month would have done 10/30 or j of the month's mileage.

Correct Average Mileage.

It will be noticed that by dividing the month's mileage by the number of days in the month, an equal number of miles is alloca,tpd to each day. This May not be correct, as the distance may have been covered betWeen the 1st and the 15th, the vehicle hiving been in dock from the 16th to the 31st. Therefore, a tyre fitted on the 15th of the month would be 'credited with 16 days' mileage, whilst actually it -should be credited With only One days. The tyre it replaces, hoWeyer, would be Credited with 'half the actual Mileage, as it was removed on the 15th ; acdordingly, that mileage which is taken from one tyre is credited to another and the average Mileage is Correct. .' Only part worn tyres are shown on the stock record cards, new stock being kept separatelSr. These cards show the part worn tyres in stOcli.

A Vehicle-mileage Point.

. On the vehicle-tyre-record cards kept by the tyre company's fitter at the operatOr'S garage, it is not neces sary for the Mileage . run by the vehicles to be entered in the spaces provided on the cards, as this is already in possession of the operator.

This system of tyre-mileage recording should -constitute a great saving to operators, as it enables them to check the mileage run by any, tyre without going to the expense of keeping records themselves. Should an operator wish to check the mileage of any tyre he can easily do so from the tyre company's fitter's records kept at the garage.

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