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|Volvo B10M MkIII|
|Other names||Mark 3|
|Year||1992 – 2012|
|Local Operators||SBS Transit|
|Gearbox||Voith DIWA 381.4
The Volvo B10M-61 Mark III is a mid-engined single-decker transit bus built by Volvo Buses, as part of the B10M line of bus chassis. Commonly referred to as the “Mark 3”, it is the successor of the Volvo B58. Like other Volvo buses, the chassis was manufactured in Sweeden.
Singapore Bus Services (SBS) acquired 300 of such buses between 1992 and 1993. After SBS was rebranded to SBS Transit, the buses continued operations, all of which were retired by June 2012.
SBS / SBS Transit:
In 1992, Singapore Bus Services (SBS) purchased 300 units of the Volvo B10M Mark III. Registered between 6 Nov 1992 – 8 Jun 1993, they were all equipped with air conditioning, an improvement over the previous batch of Volvo B10M Mark IIs. Registration continued in numerical order after the Mercedes-Benz O405s, starting from SBS582M to SBS881A.
SBS chose the 250-horsepower 9600cc Volvo THD101GC engine for the Mark IIIs. The gearbox was a three-speed Voith DIWA 381.4, the only exceptions being SBS876R & SBS877M, who were equipped with the four-speed ZF Ecomat 4HP500. Bodywork was supplied by Duple Metsec of United Kingdom and assembled by SBS Engineering Pte Ltd. Air-conditioning units were supplied by both Fuji and Sutrak.
The Mark III was also the last model of bus to use the “square desto“, a metal plate printed on both sides with route details and could be flipped when plying different directions of a particular service. Subsequent buses used the rectangular plastic desto which were back-illuminated at night.
- Volvo THD101GC engine
- Voith DIWA 381.4 and gearbox
Three-speed automatic, all units except SBS876R & SBS877M
- ZF Ecomat 4HP500 gearbox
Four-speed automatic, only SBS876R & SBS877M
- Duple Metsec bodywork
Chassis built in Sweeden, body kits provided by Duple Metsec of UK
- Sutrak/Fuji roof-mounted air-conditioning
SBS Leisure Services:
Before the arrival of the Volvo B10M MkIV Soon Chows, some MkIIIs were deployed to Sentosa for internal shuttle services. SBS616A – SBS635U bore the Sentosa livery for a short period of time before they were repainted back to the original SBS livery.
In 2001, cross-border Service 170 was converted to full air-conditioned operations, replacing the retiring non air-conditioned Volvo B57s. Many Volvo B10M MkIIIs were redeployed to Service 170 (a.k.a. JB-registered). When cross-border Service 160 was introduced in 2004, more Mark IIIs were redeployed from Hougang Depot to the cross-border service, which had spare buses after the 2003 NEL rationalization exercises. Volvo B10M MkIVs replaced the MKIIIs on cross-border routes as they were slowly retired in 2011.
As the Volvo B10M Mark IIIs approached retirement, a new batch of 300 Mercedes-Benz Citaros were ordered to replace them. June 6 2012 marked the last day of operations for the Mark III, with SBS876R on Service 9 and SBS879H on Townlink 359.
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