If you have any questions please post them here
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Thought that some SBST o.405 use merc gears?Originally posted by ^tamago^:there are mainly 2 makes of gearboxes for buses used in Singapore. One is from ZF, the other is from Voith. Both are German companies.
ZF gearboxes used on our buses all have 4 gears. all but one of the buses using ZF uses the model 4HP500. Scania L94UB (SBS2888T) uses 4HP590 which is more suited for its 9-litre engine. ZF gearboxes feature a clutch lock-up at either the first or the second gear so dun mistake it as another gear (no 5 gears!). The advantage of ZF gearboxes is faster initial acceleration. Buses using ZF are:
- SMRTB Nissan UDs
- SMRTB O.405
- SMRTB Scania L113CRL
- SMRTB O.405G (some)
- SMRTB Hino HS3KRKK/HS3KRKA
- SMRTB Dennis Lance
- SBST Volvo B10M Mk-II
- SBST Volvo B10M Mk-IV DM (most)
- SBST Volvo B10M Mk-IV Strider
- SBST Volvo B10MA Mk-IV
- SBST Volvo B10M-70 Mk-IV 14.5m
- SBST Volvo B10BLE
- SBST Volvo B10BLE-CNG
- SBST O.405G
- SBST Scania L94UB
- SBST Leyland Olympian
- SBST Volvo Olympian 12m
Voith gearboxes used on our buses all have 3 gears (they do have 4-speed gearboxes but they are not used in Singapore and they merely have an extra overdrive gear tat kicks in at 70kph hence it is quite redundant). Models used on our buses are in the format xxx.3, where 3 actually denotes the number of gear speeds. The first gear actually has a dynamic gear ratio as it is totally hydraulical, while that of the second gear is ~1.36 and for third gear, it is 1.0. The advantage of Voith gearboxes is better performance with turbocharger-fitted engines since it holds the engine at higher rpms before shifting, and high rpms means the turbocharger turbine spins faster and becomes more powerful. Buses using Voith are:
- SMRTB DAF SB220LT
- SMRTB O.405G (some)
- SBST Volvo B10M Mk-III
- SBST Volvo B10M Mk-IV DM (few)
- SBST Volvo B10M Mk-IV DM3500
- SBST O.405 (few)
- SBST Scania N113CRB
- SBST Dennis Trident
- SBST Volvo Olympian 10.4m
- SBST Volvo Super Olympian B10TL -
If TIBS O 405 uses OM447hA only then it's turbocharged without intercooler.
By hearing without visual examination, i find it harder to detect the difference between turbocharged engine with intercooler to one without, unlike between naturally aspirated with turbocharged which is more obvious to detect.
The long standing practice used by M-B is 'A' for turbocharged & 'L' for 'with intercooler'. Differences in engine revisions they tend to indicate by numbers after a decimal point after the engine model #.
The earlier diesels come with turbocharger only. Later on due to demand for even higher engine performance output with more stringent exhaust emission requirements, intercoolers were added to further reduce the intake air temperatures & increase their density to extract higher output from the same size & generation of engine.
There is some point in having turbocharger without intercooler as more parts means higher costs ! If one's performance & exhaust emissions requirements are not so high or you already have a larger capacity engine with advanced management features, multi-valves etc. to start with, then maybe the intercooler (additional part) can be omitted. But cases like these are becoming more rare nowadays and the newer generation diesel engines tend to appear with turbocharger & intercoolers as standard feature. This is to extract the highest possible performance output with least possible exhaust output with the smallest possible engine size.Originally posted by ^tamago^:Tibs' O405 uses OM447hA only, no 'L'.
i thought 'L' means turbocharged, and 'A' is the first revision of the OM447h engine (like some sort of a mark II)?
and shldn't all turbochargers come with intercooler? without the intercooler there's really no point installing a turbocharger in the first place. the intercooler's function is to cool the hot & compressed (by the turbocharger) air taken in so as to attain a higher thermal efficiency. -
Wah, thanks for breaking the long-standing misconceptions in me. Thought the SMRT MB0405 has 3 gears since they dun start with 1st gear if they come close to stopping.
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2 questions..
1. before 379, is 821, before 821 is 241W ?
2. theres a feeder in jurong east interchange in 2001, park at the last 3 individual berths, near present 105 berths . number is 331 or 241 or something, anyone knows where does it used to plies? (i think teban gardens) this service was withdrawn with the JIS revamp. -
1. Before 821 is 214W (think you made a typo error).Originally posted by 105090:2 questions..
1. before 379, is 821, before 821 is 241W ?
2. theres a feeder in jurong east interchange in 2001, park at the last 3 individual berths, near present 105 berths . number is 331 or 241 or something, anyone knows where does it used to plies? (i think teban gardens) this service was withdrawn with the JIS revamp.
2. Service 331, loop service to Teban Gdns and Pandan Gdns. Withdrawn on 12 May 2002. Services 711 to 713 were handed to private operator on 30 June 2003. -
most, in fact. they use a 3-gear MB-made gearbox. a few n the 5xx region are using voith, and all these belong to bram/amdep (none with slbp).Originally posted by SBS9828X:Thought that some SBST o.405 use merc gears? -
some mercedes 0405 have an extra white compressor in the interior and an extra, short outside compressor on the roof.regos: SBS 54x.eg. SBS540B (on 73 i tink) . anyone knows what purpose it serves?
thanks -
the inside extra white thing i think is simply to direct the air-con to the 2 ducts, unless it's something else u r talking about.Originally posted by 105090:some mercedes 0405 have an extra white compressor in the interior and an extra, short outside compressor on the roof.regos: SBS 54x.eg. SBS540B (on 73 i tink) . anyone knows what purpose it serves?
thanks
as for the outside one, i have no idea, but i guess it's an additional compressor unit, either for more air-conditioning power or they changed the air-con and it required extra space for its components. -
Got 1 qn...
Yesterday took an LO3X on 28... the aircon holes had came out and it was directly above me. But i couldnot get the air-con even though itsopen but wen i move my head 4ward, i can feel it... So,
wer do aircon come from? i know that all DDs come from the back rite... -
Air con on DDs come from the air con unit at the back.Originally posted by SBS9828X:Got 1 qn...
Yesterday took an LO3X on 28... the aircon holes had came out and it was directly above me. But i couldnot get the air-con even though itsopen but wen i move my head 4ward, i can feel it... So,
wer do aircon come from? i know that all DDs come from the back rite...
Sometimes when bus turns, the air con blows to other direction then back to normal. -
Questions.
A. Is 103/163/820/821 taken over back by SBS on 28 Dec 1999?
B. Is 82 taken back by SBS on 29 Aug 1999?
C. Service 72.. when did it extended to tampines (from amk ave 5)
D. Service 80: (Hougang Central to Tampines via old tampines road) when
was it introduced and withdrawn? heard svc 72 extended to tampines after
80 was withdrawn
E. 866 became 86 12 Dec 1999? -
Originally posted by tranquilice:Air con on DDs come from the air con unit at the back.
Sometimes when bus turns, the air con blows to other direction then back to normal.
yep i always feel that but how bout single deck? since the aircon cover cant be open, how to know? -
Originally posted by 105090:Questions.
A. Is 103/163/820/821 taken over back by SBS on 28 Dec 1999?
Yes
B. Is 82 taken back by SBS on 29 Aug 1999?
Yes
C. Service 72.. when did it extended to tampines (from amk ave 5)
When it merged with Svc 80
D. Service 80: (Hougang Central to Tampines via old tampines road) when
was it introduced and withdrawn? heard svc 72 extended to tampines after
80 was withdrawn
80 was introduced as a TAM-HGN service after TPE was fully opened and 81 amended to ply PSR Dr 12. Later merged with 72 and withdrawn.
E. 866 became 86 12 Dec 1999?
Yes. On the same day, Svc 865 became 85 and Svc 80 was formed with the merger of 84 & 864 -
VOID
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How are bus terminals controlled? Which route groups are in charge of them:
- Admiralty Rd West
AMDEP
Buona Vista
Changi Village
Geylang Lor 1
Ghim Moh
Harbourfront
Kembangan MRT
Kent Ridge
Marina Centre
New Bridge Rd
Queen St
Sembawang Rd End
Shenton Way
Sims Place
St Michael's
Tuas
Upp East Coast
Yio Chu Kang -
From what i know, Geylang Lor 1 (SBST11) is Under Serangoon Same goes to Sims PLace (SBST64) also come under Serangoon...Originally posted by iveco:How are bus terminals controlled? Which route groups are in charge of them:- Admiralty Rd West
AMDEP
Buona Vista
Changi Village
Geylang Lor 1
Ghim Moh
Harbourfront
Kembangan MRT
Kent Ridge
Marina Centre
New Bridge Rd
Queen St
Sembawang Rd End
Shenton Way
Sims Place
St Michael's
Tuas
Upp East Coast
Yio Chu Kang -
how to get to police academy from bukit panjang? front gate and side gate
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how to get to police academy from bukit panjang(front gate)?
how to get to bukit panjang from police academy(side gate, near the girls' sch)? -
Service 72 was extended to Tampines in March 1998, when it merged with former service 80.Originally posted by 105090:C. Service 72.. when did it extended to tampines (from amk ave 5)
D. Service 80: (Hougang Central to Tampines via old tampines road) when
was it introduced and withdrawn? heard svc 72 extended to tampines after
80 was withdrawn
Former service 80 was introduced in Sep 1996, to replace the route of service 81 along (Old) Tampines Rd, when the latter was amended to ply TPE due to the opening of Pasir Ris Dr 12 and the modification of Elias Rd junction with TPE. Withdrawn in March 1998 with the extension of service 72 to Tampines. -
Originally posted by SBS9828X: yep i always feel that but how bout single deck? since the aircon cover cant be open, how to know?
The aircon covers on DDs cannot be opened too but when the bus turns, it can be felt. -
How many route groups are there for SBST and SMRT respectively? What are the route groups?Originally posted by iveco:How are bus terminals controlled? Which route groups are in charge of them: -
bukit panjang (front gate)?Originally posted by flyt0thesky:how to get to police academy from bukit panjang(front gate)?
how to get to bukit panjang from police academy(side gate, near the girls' sch)?
1. from Bt Panjang, take either 190 (New Bridge Rd), 700 (Shenton Way), 700A (Suntec City) or 960 (Marina Centre) to Whitley Rd/Tanglin CC.
then cross overhead bridge to Whitley Rd/Raffles Town Club and take either 105 (Serangoon), 132 (Hougang Central), 151 (Hougang Central), 153 (Hougang Central), 154 (Eunos) or 156 (Sengkang) to PIE/Police Academy.
2. from the side gate, take either 132 (Bt Merah) or 156 (Clementi) to Whitley Rd/Tanglin CC.
then cross overhead bridge to Whitley Rd/Raffles Town Club and take either 190 (Choa Chu Kang), 700 (Bt Panjang), 700A (Bt Panjang) or 960 (Woodlands).
pls post such questions in Need directions to get to your destination ? Post here the next time. -
ooo.. yeah. i remembered 81 plied old tamp road. there was a traffic junction at old tamp. road/ elias road and TPE!! it was the sole traffic light in all the expressways.Originally posted by tranquilice:Service 72 was extended to Tampines in March 1998, when it merged with former service 80.
Former service 80 was introduced in Sep 1996, to replace the route of service 81 along (Old) Tampines Rd, when the latter was amended to ply TPE due to the opening of Pasir Ris Dr 12 and the modification of Elias Rd junction with TPE. Withdrawn in March 1998 with the extension of service 72 to Tampines. -
nope the aircon outlet i mean as most of them at the back of DDs have been broke openOriginally posted by tranquilice: The aircon covers on DDs cannot be opened too but when the bus turns, it can be felt.
So how bout SD? -
MAJJOR Question!!
Service 107 weekdays schedule:
Last bus from HG is 1930
Last bus from Shenton Way is 1930
BUT first 107X from HG to marina is 1948.
means:
last 107 bus to reach Beach road (towards HG)is about 1945. then pax who is boarding at say beach road unlucky miss the last 107 bus has to wait for the first 107X bus to come to marina centre and loop back towards HG, then he can board back towards HG?
like that means wait one hour in between.
can anyone clarify?