SRPS DIESEL GROUP 2020 ©
After the frustrations of not being allowed on site for over 3 months it has been good to get
back in to things. We have all settled in to the new ways of working with a daily cleaning
regime, rostering of staff to manage numbers and a new method of work to observe.
D2767 – Still out of service awaiting repairs to the dynamo and water pump drive.
D3558 – The engine rebuild was finally completed in July after we obtained the missing part
of the cylinder head valve operating gear. This allowed us to give the engine sump a final
heavy clean and then fill and test the lubricating oil and cooling water systems. Once it had
been confirmed all the bearings were receiving a supply of oil the tappets were set, the fuel
system bled to get the air out and the engine was started. This all went well and the engine
runs very cleanly and shows the benefit of overhauled fuel pumps, fuel injectors and cylinder
heads. The air tanks were re-certified by the Society insurers and a maintenance exam
including greasing was undertaken on the underframe.
Rather than release it back into service in the worn green livery it was decided to carry out a
repaint and freshen up the green livery. This work is progressing well and should be finished
20020 – Remains out of service awaiting a power unit lift to repair the engine balancer shaft
bearings. The loco is being kept operational on very restricted yard use to prevent any
further deterioration during storage. Repairs are not scheduled to take place until 2022.
25235 – Work has continued albeit at a slow pace with the refitting of the overhauled
turbocharger. Progress has also been made offsite thanks to the money raised by the appeal
with 4 radiator elements fully overhauled and returned to Bo’ness. These are not cheap to do
and we still have 15 failed ones requiring overhaul so all donations are welcome! A set of
buffers has also been sent for overhaul and plans are being made to continue with
refurbishment of the bogie brakegear. Any donations to help cover these costs would be
more than welcome and can be made at www.virginmoneygiving.com/fund/25235finalpush
26024 – No recent progress. Once a replacement turbocharger has been overhauled we will
be able to try and get the engine running again.
26038 – Overhaul of the generator has been completed at Sulzer in Larbert and it returned
to Bo’ness on 25 th September. It was lowered straight back in to the loco and is now awaiting
bolting down and alignment followed by refitting of the various components that sit on top of
it. There has been no progress with the engine repairs due to waiting material. The cylinder
liners were removed for new seals to be fitted, during inspection three were found to be
beyond reuse. We are trying to source six replacements from a supplier who has previously
obtained these for a main line operator but the manufacturer located in Spain is unable to
commit to a date at present as several key members of staff are presently unable to attend
work due to Covid-19.
27001 – The generator has also been completed at Sulzer in Larbert and was also refitted in
to the loco on 25 th September. We reckon both generators have not seen any major attention
for around 35 years and despite this the amount of work required has been fairly routine.
While the generator was out a lot of repairs have been carried out to the engine room floor.
Much of this was severely corroded and has been replaced with stainless steel plate. A large
amount of control and power cables are housed in a trunking on top of the floor which had
also rotted away, this has been replaced with a fibreglass fabrication. A great deal of
cleaning and painting has also been carried out in the engine room. On the outside a set of
overhauled buffers has been fitted along with repairs to a badly bent snowplough mounting
27005 – On display in the shelter awaiting shed space.
37025 - Still on hire to Colas and presently working all over the UK on Infrastructure
37261 – Work has continued on the engine rebuild. The camshafts were inspected and both
required removal due to corrosion on various cams. The cams that operate the inlet and
exhaust valves are shrunk on to the shafts and can only be removed with the entire
camshaft out. (The camshaft splits in to three sections to aid removal). Fuel pump cams are
split and are straightforward to change. With both shafts out we were able to swap fuel cams
and utilise spare sections to make up two complete good shafts. So far A bank side has
been refitted along with all the followers. In addition to this three cylinder liners have been
cleaned up, inspected and refitted along with some of the pipework on the free end. The
intercoolers have also been refitted. It was decided to put the engine back in to the loco to
allow us to confirm the alignment was ok and this was carried out on 24 th September. The
alignment was found to be all good and we now intend to carry on with the reassembly as
parts are made ready. So far all the pistons have been cleaned up along with four
connecting rod assemblies.
Inside the loco the engine room floor was painted black prior to the engine refit and since
then the radiator fan compartment has been getting painted. Overhaul of the control cubicle
is also progressing with the various components gradually being refurbished.
37403 – A start has been made on overhaul of the replacement engine with the stripping of
one of the spare units we purchased three years ago. This had been stored outside on a
Turbot wagon and rainwater had got into most of the cylinders making dismantling difficult
and time consuming. The aim was to confirm the engine block and crankshaft were in good
condition as we plan to recover all the other components from the unit originally fitted to 403.
Following removal of all cylinder heads, pistons, connecting rods and cylinder liners the
engine block was split to access the crankshaft. One main bearing journal was found to have
some damage on it so it was decided to send the crankshaft for refurbishment. This has
gone to a specialist repairer along with another spare we recovered two years ago.
The damaged power unit was removed from the loco on 24 th September and the engine split
from the alternator. The alternator is now located on the Rectank wagon vacated by 37261’s
power unit while the engine (which is to be returned to DRS) is located on the Warflat
wagon. The engine sump has been lifted on to the Rectank wagon and is being cleaned and
painted ready for return of the crankshaft. A start has been made on cleaning and
preparation of the many components required with these refitted where possible.
37703 – Available for service, currently undergoing a C exam and has received a
replacement set of brake blocks.
47643 – Out of service awaiting a maintenance exam and recertification of the air receivers.
For more updates on the Diesel Group www.realrail.smugmug.com