+- Forum | Merseyside Dennis Dart Website (http://dartslf.com/forum)
+-- Forum: Other Transport (/forumdisplay.php?fid=9)
+--- Forum: Railways (/forumdisplay.php?fid=10)
+--- Thread: Merseyrail (/showthread.php?tid=36)
Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417
RE: Merseyrail - teenagewasteland - 15/06/2022 08:52
(10/06/2022 18:03)508134 Wrote: How many units are currently out of service due to this fault?
Any further details on what has caused these wheel bearing faults on the units?
It's something to do with voltage returns that come through the wheel bearings from the live rail. The third rail voltage has increased to 750V in preparation for the introduction of the 777s, whereas the 507/508 stock work at around 500V. Consequently, some components are having difficulty coping with the increased electrical load.
RE: Merseyrail - 313201 - 15/06/2022 11:51
The track voltage was raised up to 750 volts back in the late 70s in preparation for the arrival of the 507 units on the northern line.
Over here in the wirral, we still had the 503s until the early 80s when merseyrail decided to replace them with the 508s which were originally intended for the wirral but were diverted down to the southern and worked down there until the class 455s were built.
Once the 455s started arriving, the 508s became surplus to requirements and 1 of the trailer coaches was removed and inserted into the 1st batch of 455s which were arriving as 3 coach sets, these sets became known as class 455/7 and are easily distinguishable from the other class 455 units of sub classes 455/8 & 455/9 which all have the same roof profiles over the 4 coaches of each set whereas the class 455/7s have 3 coaches with the same roof profile and the flattened roof of the ex class 508 coach.
Upon arrival of the first class 508s on the wirral which were stored at the old Mollington Street depot in Birkenhead, the 503s continued to soldier on as much as they could on a track voltage of 650 volts.
The 508s were renumbered from the 508/0 numbers they had such as 508043 as they were in there original 4 coach formations, but when they were reduced to 3 coach sets they became class 508/1 units for example the above unit number now became 508143 which it still carries today.
For the 508s to be introduced, track work was carried out anx the power supply on the wirral upgraded to 750 volts which resulted in the 503s being withdrawn from service.
For 3rd rail electrification 750 volts has become the standard power supply rating unless sothern have upgraded their system to a higher voltage which I have no information about.
The only trains in Merseyside which worked on a power rating lower than 650 volts were the trains on the Liverpool Overhead Railway which operated on 550 volts.
Hope this helps.
RE: Merseyrail - ls1911 - 15/06/2022 16:02
(15/06/2022 11:51)313201 Wrote: The track voltage was raised up to 750 volts back in the late 70s in preparation for the arrival of the 507 units on the northern line.
Over here in the wirral, we still had the 503s until the early 80s when merseyrail decided to replace them with the 508s which were originally intended for the wirral but were diverted down to the southern and worked down there until the class 455s were built.
Once the 455s started arriving, the 508s became surplus to requirements and 1 of the trailer coaches was removed and inserted into the 1st batch of 455s which were arriving as 3 coach sets, these sets became known as class 455/7 and are easily distinguishable from the other class 455 units of sub classes 455/8 & 455/9 which all have the same roof profiles over the 4 coaches of each set whereas the class 455/7s have 3 coaches with the same roof profile and the flattened roof of the ex class 508 coach.
Upon arrival of the first class 508s on the wirral which were stored at the old Mollington Street depot in Birkenhead, the 503s continued to soldier on as much as they could on a track voltage of 650 volts.
The 508s were renumbered from the 508/0 numbers they had such as 508043 as they were in there original 4 coach formations, but when they were reduced to 3 coach sets they became class 508/1 units for example the above unit number now became 508143 which it still carries today.
For the 508s to be introduced, track work was carried out anx the power supply on the wirral upgraded to 750 volts which resulted in the 503s being withdrawn from service.
For 3rd rail electrification 750 volts has become the standard power supply rating unless sothern have upgraded their system to a higher voltage which I have no information about.
The only trains in Merseyside which worked on a power rating lower than 650 volts were the trains on the Liverpool Overhead Railway which operated on 550 volts.
Hope this helps.
The Merseyrail network was meant to be a standard 750v dc all round. However testing revealed that in parts the voltage was as low as 400v dc basically down to old equipment.
Whereas the existing units could work quite happily with anything over about 450v dc there's no way the 777s will hence the upgrades to the network to get a constant 750v dc all around.
RE: Merseyrail - childwallblues - 22/07/2022 19:49
On 12/07/2022 I was at Didcot Station when 66788 passed through with 455814 and 455822 on their way from Stewarts Lane to the scrapyard at Newport. The consist included two barrier vehicles 64664 and 64707 which were formerly part of South Eastern Railways 508207 previously Merseyrail 508116 and new to South Western Trains as 508016. Quite a chequered life for these two carriages.
RE: Merseyrail - ste - 23/07/2022 23:49
Hi does anyone know if the track between Fazakerley and Kirkby is to been changed to two tracks rather than a single and how that will look at Kirkby station?
RE: Merseyrail - ls1911 - 24/07/2022 06:30
(23/07/2022 23:49)ste Wrote: Hi does anyone know if the track between Fazakerley and Kirkby is to been changed to two tracks rather than a single and how that will look at Kirkby station?
Remaining as 1 track
RE: Merseyrail - 507022 - 24/07/2022 16:34
(23/07/2022 23:49)ste Wrote: Hi does anyone know if the track between Fazakerley and Kirkby is to been changed to two tracks rather than a single and how that will look at Kirkby station?
It’s single line (as previously mentioned) due to the M57 bridge, as far as Kirkby, then double track after Kirkby to Headbolt Lane, which will have 2 platforms to allow for a 15 min frequency
RE: Merseyrail - 508134 - 25/07/2022 11:11
Slightly off topic from recent discussions but what was the reason for the closure of the Hall Road depot in 1997?
Also, does anyone have the exact date for its last operation?
RE: Merseyrail - H101GEV - 25/07/2022 20:04
(25/07/2022 11:11)508134 Wrote: Slightly off topic from recent discussions but what was the reason for the closure of the Hall Road depot in 1997?
Also, does anyone have the exact date for its last operation?
I'm not sure of the exact date unfortunately, but officially it was 31st May 1997 as that was the final day of the September 1996 working timetable, the last to show booked movements at Hall Road. Birkenhead Central's shed was closed at the same time. They might have been run down and abandoned in the weeks prior but I'm not sure.
The closure of both locations was an economy measure, concurrent with the fleet size being reduced from 63 units to just 53. The June 1997 timetable change was brutal: it saw swathes of six car workings reduced to three and was probably the height of the 'Miseryrail' era.
RE: Merseyrail - 507022 - 26/07/2022 18:08
(25/07/2022 20:04)H101GEV Wrote: I'm not sure of the exact date unfortunately, but officially it was 31st May 1997 as that was the final day of the September 1996 working timetable, the last to show booked movements at Hall Road. Birkenhead Central's shed was closed at the same time. They might have been run down and abandoned in the weeks prior but I'm not sure.
The closure of both locations was an economy measure, concurrent with the fleet size being reduced from 63 units to just 53. The June 1997 timetable change was brutal: it saw swathes of six car workings reduced to three and was probably the height of the 'Miseryrail' era.
At its peak The Merseyrail network had 76 units and Hall Rd and Birkenhead North were responsible for maintenance. As you said, it was reduced to 63 when some 508s were sent to South Eastern ( I think) in the 1990s and became 508/2 or 508/3. We are now down to 56 with another (508143) at Derby.