Australian DL531 (48/830) model locomotives

 
  Railwayfan Train Controller

Location: By a Railway
Hi all,

I am interested in some specs of the 830s. I thought rather than dig up fossil threads, I would post here. I have come across this website & was wondering if it is the DL 531s that was built in Australia or were the Australian DL531s modified (link below). The reason I ask is that the site is American with imperial measurements so led me to ask if the they were modified or this is how they were delivered.

http://www.thedieselshop.us/DataDL531.HTML

I am also after anything that might help or where I could get it from (shops also inclusive) in terms of the engine specs, generator, alternator, cab ext. I know vicsig, Railpage loco database, Rail Tasmania ext provide good general info & Alco world has some other  good items of interest as well.

Nathan

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  GT46C-ACe Deputy Commissioner

Location: Gold Coast QLD
Pretty sure the DL531 built here is different to those built elsewhere in terms of size and general body design.
  M636C Minister for Railways

The Goodwin built locomotives were built on a longer underframe than US and Canadian built DL 531 locomotives. I believe the dimension was increased by eighteen inches, but that is just my recollection but should be easily checked. You do need to use the measurement over body and not over couplers which varies with the type of coupler fitted, of course. The main reason was to increase the fuel capacity and the bogie centres were increased by the same amount as the frame length. The body was unaltered so short platforms were provided at each end of the locomotive.

M636C
  NOELWB Locomotive Driver

Hi Railwayfan. I note the deiselshop website has the engine described as a V6. I am 99% certain that the DL 531s were all inline sixes not V6s.
  Pressman Spirit of the Vine

Location: Wherever the Tin Chook or Qantas takes me
G'day Railwayfan,

Chris Drymalik's ComRails web site has a wealth of info on SAR and CR locos (Steam and Diesel) and rolling stock

Try this link http://www.comrails.com/sar_locos/r_830.html#830

That page will give you info on the engine horsepower (it varied across the range) loco weights, gear ratios etc for both the original 830's and the DA rebuilds.
Also states the gauge each loco was delivered on, gauge conversions, transfers, scappings, etc

Also, as a point of interest, the DL531 was built in Australia at a time (1959-1966) when Australia used the Imperial Measurement system
Australia started to convert to metric system in 1971
  Pressman Spirit of the Vine

Location: Wherever the Tin Chook or Qantas takes me
Hi Railwayfan. I note the deiselshop website has the engine described as a V6. I am 99% certain that the DL 531s were all inline sixes not V6s.
ComRails site  http://www.comrails.com/sar_locos/r_830.html#830

Says:-
Engine Manufacture = ALCO
Engine Model           = 251
Engine Cylinders      = 6 in line

diesel shop site also states different horsepower and gear ratios than the comrails site
  M636C Minister for Railways

Hi Railwayfan. I note the deiselshop website has the engine described as a V6. I am 99% certain that the DL 531s were all inline sixes not V6s.
ComRails site  http://www.comrails.com/sar_locos/r_830.html#830

Says:-
Engine Manufacture = ALCO
Engine Model           = 251
Engine Cylinders      = 6 in line

diesel shop site also states different horsepower and gear ratios than the comrails site
Pressman
Alco never made any 251 engines in a v-6 layout.

However, EMD never made any in line 567, 645 or 710 engines.

I think the extension in the length of the DL 531 was the same as that to the EMD G8 and G12 locomotives (VR T, QR 1400 and so on) built in Australia and for the same reason, more fuel. This means that HO models of Australian locomotives of these types can't be used to represent locomotives overseas (except the five Hong Kong G 12s built here).

M636C
  Shed_Rat Train Controller

Location: 'A' Shop - Swindon Works
The Department of Railways NSW publication "Modern Locomotives in Service on the New South Wales" gives the following data on the 48 class:

Engines: Alco 251B Turbosupercharged 4 stroke, 6 cylinder, 9" bore x 10.5" stroke, 375 rpm idle, 1025 rpm max, 1050 HP at engine, 950 HP available for traction.

4801-4845 fitted with GE 5GT 584 traction  generator & GE 761 traction motors.
4846-4885 fitted with AEI TG 3602 traction generator & & GE 761 traction motors.
4886-48165 fitted with AEI TG 3602 traction generator & AEI 253 CT traction motors.

4801-4885 fuel capacity - 500 imperial gallons
4886-48165 fuel capacity - 700 imperial gallons

4801-4885 total weight- 74 imperial Tons
4886-48165 total weight - 76 Tons 12 cwt (imperial)
  M636C Minister for Railways

The Department of Railways NSW publication "Modern Locomotives in Service on the New South Wales" gives the following data on the 48 class:

Engines: Alco 251B Turbosupercharged 4 stroke, 6 cylinder, 9" bore x 10.5" stroke, 375 rpm idle, 1025 rpm max, 1050 HP at engine, 950 HP available for traction.

4801-4845 fitted with GE 5GT 584 traction  generator & GE 761 traction motors.
4846-4885 fitted with AEI TG 3602 traction generator & & GE 761 traction motors.
4886-48165 fitted with AEI TG 3602 traction generator & AEI 253 CT traction motors.

4801-4885 fuel capacity - 500 imperial gallons
4886-48165 fuel capacity - 700 imperial gallons

4801-4885 total weight- 74 imperial Tons
4886-48165 total weight - 76 Tons 12 cwt (imperial)
Shed_Rat
It is worth noting that 4846 to 4885 were ordered with AEI 253 motors, but these motors were fitted to 44 class locomotives in exchange for the GE 761 motors fitted to the 44 class as built. This (probably by swapping the motors and axles) allowed an increase in the top speed of the 44 class from 65mph to 70mph.

The increase in the fuel capacity was obtained by moving the air reserviors from the fuel tank area to the short hood which displaced the batteries to a box ahead of the cab on the driver's side.

M636C
  alcoworldseries Deputy Commissioner

Location: Auburn
What has been overlooked in this thread is the numerous modifications that have occurred to such a large group of loco's over a very long working life, I know here in SA the traction motors regularly swapped around as required and 833 and 843 both received trial turbochargers that boosted horsepower to 1000 HP (833 received a Napier turbo and 843 a Boveri Brown turbo) let alone hundreds of other minor changes.
  Railwayfan Train Controller

Location: By a Railway
Hi all,
Thanks for all your reply's, and sorry for not being able to respond. I had forgotten a couple of details as mentioned by some users. I am after a couple of questions though:
In you list Shed-rat, would you know which series of the 48s were identical to the 830s, in particular the later versions?
Also, what would the mass be of different loco components roughtly? I know the bogies sat around the 16 tonne mark someone has told me, the engine 10.1 tonne dry I think, and the rest I am not sure to add up to 71.4 tonne they weigh (approx.)
Nathan
  M636C Minister for Railways

Hi all,
Thanks for all your reply's, and sorry for not being able to respond. I had forgotten a couple of details as mentioned by some users. I am after a couple of questions though:
In you list Shed-rat, would you know which series of the 48s were identical to the 830s, in particular the later versions?
Also, what would the mass be of different loco components roughtly? I know the bogies sat around the 16 tonne mark someone has told me, the engine 10.1 tonne dry I think, and the rest I am not sure to add up to 71.4 tonne they weigh (approx.)
Nathan
Railwayfan
No 830 class had the enlarged fuel tank, so 830 class were most like locomotives 4801-4885 which had the original fuel tank.

All 48 class were built with buffers in the form of plates that prevented buffer locking with passenger cars with corridor connections, and no 830 class had these buffers.

48 class had different air pipe connections on each end (847-849 were modified when on lease to NSW)

M636C

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