In recent months, First, Go Ahead and Metroline ordered over 100 Wright bodied volvo B9L d/ds- following the lifting of the 'ban' on ordering them because of noise problems.
On Monday, 4 new 'weevils' [WVL class] entered service from NX garage on route 21.
Here is wvl282 on route 21 on the first day, taken at Borough high street.
There are 4 such buses in service on route 21 [out of 20 required for the route on mon-fri]
I am not sure whether Volvo managed to get a rid of the noise problem but for sure those 1-2yrs old B9TL running in HK has got similar problem with the B7TL in England.
Some of the volvo B7Ls in London are being refurbished, and have an 'engine upgrade.modification'.
This includes an extra gear, some noise insulation and modifications to the engine and fan.
I do not know exactly how it works, but, so far, it seems to have done the work!
as you day, time will tell! but it did convince London Buses.
原帖由 norrislaw 於 2009-11-5 16:45 發表
I am not sure whether Volvo managed to get a rid of the noise problem but for sure those 1-2yrs old B9TL running in HK has got similar problem with the B7TL in England.
Those in HK have the same radiator as the B7TL. The 2-axle B9TLs in Britain has a different radiator which sounds very different and much quieter. In any case, the noise issue seems to have gone away and the ban was formally lifted last year.
summykam: That, apparently, is one of the weight-saving feature adapted by Wrightbus to cut the weight down.
Excluding recent retrofits, only 20 of the preultimate batch of WVLs(192-211) were fitted with the air cooling unit, and they all have the smaller windows.
Those without the smaller windows are examples which have been retrofitted with the unit recently. None of their final batch (WVL212-273), as far as I know, are fitted with the system.
but it did convince London Buses.
