IF( evaluates ractive units
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ME 20 different maximum ight tractive units are now der test as part of a National ?ight Corporation vehicle 4uation programme. The aides are operated by varis British Road Services subLiaries. NFC's engineering partmerit is looking for a hide with an operational life 804,500km (500,000 miles). Results from tests on the st two vehicles—a Guy Big J service with Midlands BRS d a MAN 16.232 with Northstern BRS—have been pubhed by the BRS staff newsper. Results were as follows: AN—,operated on trunking )rk from Hull branch. In six Dnths covered 39,379km 4,474 miles) at an average el consumption of 34.81it/ ■ Okm (8.1mpg) and average consumption of 633.5km/1 25 miles/pt). Average load 16 ns; laden mileage 64.9 per nt of total.
LJY—opeia:ted on London ank runs from Forest of an branch. In 13 months )vered 150,273km (93,395 iles) at an average fuel conimption of 41.541it/100krn .8mpg) and an average oil msumption of 1,290km/1 (457 iles/pt). Average load 18 ms; laden mileage 85.6 of otal.
The replort, which is to be rIlowed by others on the NFC rogramme, went on to list the lgineering reports on each more on the Guy because of its longer operational period.
MAN—Two 4,827km (3,000mile) services cost £14.08 and £19.50 respectively; five days out of service to fit six new pistons and liners are routine campaign change (no charge). GUY-0/S spring bracket renewed, oil leaking 'through spring section; silencer mountings altered; brakes relined (at 83,343km (51,978 miles)); starter changed under warranty after armature spindle breakage; front tyres wearing unevenly, service header tank brazed, speedo cable changed; accessory drive shaft oil-seal renewed; new header tank fitted under warranty; two new tyres (cost £63.51); two rearaxle spring-brake cylinders renewed; rear-spring main leaf renewed; exhaust flex renewed.