Waterbodies & Maritime => Chatham Dockyard => Topic started by: kyn on March 21, 2012, 09:48:22

Title: No 10 Crane
Post by: kyn on March 21, 2012, 09:48:22
5 ton loco crane no. 10

(http://i260.photobucket.com/albums/ii34/batgirlphotos/KHF2/IMG_0565Medium.jpg)
Title: Re: No 10 Crane
Post by: Bilgerat on March 21, 2012, 21:04:58
This crane was one the few which didn't have an on-board generator. If you look at the other cranes around the docks in the Historic Dockyard, you'll see what looks like a shed. This contained a generator set. The crane on the other side of Cavalier and the one by the stern of Gannet both have these.

There is a working example of these cranes, on the wall between basins 3 and 2.
Title: Re: No 10 Crane
Post by: Sentinel S4 on March 21, 2012, 21:15:11
Sorry but I thought that the Loco Cranes were the rail bourne sheds with jibs. They were cranes first, all steam I think, and could move trucks if required hence the name. I thought that these were 'normal' dockside electric freight cranes..... S4.
Title: Re: No 10 Crane
Post by: Bilgerat on April 22, 2012, 22:26:39
Sentinel - you're probably right. What I do know about this crane is that at some point in the next couple of months its going to be encased in a scaffold and be given a good clean and re-paint. All the cranes in the Historic Dockyard are looking a bit derelict and sorry for themselves these days but as this one is at the head of a dock, it's first on the list.
Title: Re: No 10 Crane
Post by: mikeb on April 23, 2012, 10:45:10
Quote
This crane was one the few which didn't have an on-board generator. If you look at the other cranes around the docks in the Historic Dockyard, you'll see what looks like a shed. This contained a generator set.

When working on YSM as an apprentice, I was told that these cranes were originally built as "kits" to be shipped to France after "D"Day and they were self contained so that there was no need for mains electricity. Whether these cranes ever made it to France and were repatriated I don't know. I cannot recall the yard cranes running on their generators, but they were certainly periodically overhauled & tested.

Can anybody verify, or indeed repudiate, this story?
Title: Re: No 10 Crane
Post by: Bilgerat on June 13, 2012, 21:54:20
Rumour control has it that the scaffolders will start on this next week. Once the scaffold is up, work can begin on cleaning and repainting the crane, repairing as necessary as we go.
Title: Re: No 10 Crane
Post by: Bilgerat on June 20, 2012, 22:28:53
The scaffolders began work on this today. The scaffold should be completed by the middle of next week at which point work will begin on cleaning it up and repainting it. When finished in about 6 - 8 weeks time (weather permitting), it will look like new (well, almost anyway).
Title: Re: No 10 Crane
Post by: Bilgerat on July 24, 2012, 19:35:31
A quick update with some more pictures.

Work on the jib is now complete, as are the metal repairs to the cab/winch-house. As of today, the scaffold around the jib has been struck, leaving the main body of the crane still encased. The cab/winch-house is resplendent in it's pink under-coat. The focus of the steel-work repairs was two-fold. Firstly, to protect from further decay by cutting out and replacing rotten steel and preventing birds getting into the cab, where they've been roosting for years.

(https://i.imgur.com/iNWH0qL.jpg?1)

We've now started work painting around the slew ring underneath the cab and at the top of the base. This is going to be a barrel of fun, especially in this weather, in amongst all the pigeon poo and dried grease.

Here's some pictures of inside the cab/winch-house

The slew and jib luffing controls

(https://i.imgur.com/4vXRWv5.jpg)

The right-hand lever controls the jib and the left one controls slewing left and right.

Winch control (left) and winch brake (right). I'm told that the two foot pedals just visible to the left of the winch control are the travel brakes.

(https://i.imgur.com/4VTKvQ0.jpg)

Travel control (up and down the dock on the rails)

(https://i.imgur.com/QXPCKlW.jpg)

A view of the winch controls next to the travel controls

(https://i.imgur.com/9h8pIwF.jpg)

The main winch in the winch-house behind the cab

(https://i.imgur.com/fRV7EsX.jpg)

A couple of views of the slew-ring at the top of the base under the cab.

(https://i.imgur.com/CqHOdIt.jpg)

(https://i.imgur.com/1S2Ey2y.jpg)

The slew pinion. The yellow device bolted to the pinion locks it in place, preventing the crane from slewing. The slew pinion is driven by a motor under the floor of the cab.

(https://i.imgur.com/Ub6NjST.jpg)

The smell in the winch-house is indescribable but is beginning to fade away now it's drying out.

The plan is to replace the broken glass in the windows, which along with the repaired steel-work will prevent pigeons getting into the cab/winch-house once and for all (fingers crossed) and to put netting across the void underneath. This should stop birds roosting under the cab and in the slew-ring. The upper framework will be fitted with bird-spikes, to prevent the roof becoming encrusted in pigeon poo again.
Title: Re: No 10 Crane
Post by: DaveTheTrain on July 24, 2012, 22:04:19
Great photos Bilgerat.  Thats a very interesting modification to the slew-ring.  My initial thought was why not just disconnect the slew ring motor feed, but on thinking about it further the bolts on the involute gear prevent the crane from slewing under wind-load - either against a load or the body of the crane.  This raises the question in my mind as to wheher there is a slew ring brake or not, I suspect they may have but are possibly worn out. 

Any thoughts Bilgerat.
Cheers
DTT
Title: Re: No 10 Crane
Post by: Bilgerat on July 25, 2012, 22:47:48
Hi DTT,

I expect there is a brake system of some sort on the output shaft from the slew motor. The luffing motor (also underneath the cab) clearly has a hand-brake system using a pair of brake shoes on the shaft to the luffing gears in the winch-room. The crane is clamped to the rails to stop it moving and that appears to be something built in rather than added when the crane was decommissioned. The jib is permanently secured by a pair of arms bolted to the pulley tower above the cab which are clamped to the jib. They're painted bright yellow so will be clearly visible when the upper part of the scaffold is struck, probably next week.

I'll try to get some pics of it when I get time.

By way of an aside, the first set of pictures I put up show a hot-plate in the cab by the door above the fire-extinguisher. I suppose this would also have provided some heating for the cab in the winter.

The whole project, including taking the scaffold down must be completed by the end of the first week in September, when I'm told, the Antiques Roadshow will be filming in the Yard.
Title: Re: No 10 Crane
Post by: DaveTheTrain on July 26, 2012, 15:43:05
Thanks Bilgerat.  The hot plate is interesting.  This seems to tally with the crane drivers' mode of working throughout the yard, i.e. once you were up in your crane you stayed up.  I think I have posted before on the tea room at the end of overhead travellers on 7 slip, again allowing the men to stay in their place of work.

DTT

 
Title: Re: No 10 Crane
Post by: Sentinel S4 on July 26, 2012, 20:32:42
Hi Bilgerat. Like DTT I am enjoying this series of pics and writings, he keeps beating me to the questions though. I like the locking plate for the slew gear, it could not be more simple and holds itself in place. Brilliant pics of the control gear, they answer a lot of questions. Those drivers must have been dancing all over controlling these machines.

S4.
Title: Re: No 10 Crane
Post by: Bilgerat on August 01, 2012, 20:43:02
Work continues apace. The cab/winch-house is now dark grey down to its base. The legs are starting to turn pink as is the void in the middle where the central slew bearing and the roller bearings are located.

Will try to make time to get into the space under the cab to get some pics of the luffing motor and slew motor, both of which are substantial bits of kit.

The upper part of the scaffold down to the top of the base will probably be struck next week. Also, the glaziers will be in next week to replace the broken windows and hopefully, bird-spikes and netting will be put in place too. We're never going to stop pigeons getting on it and making a mess of it, but we'll be making it as hard for them as we can :)
Title: Re: No 10 Crane
Post by: kyn on August 07, 2012, 13:38:15
A photo from the 3rd August
Title: Re: No 10 Crane
Post by: Bilgerat on August 19, 2012, 13:03:13
Another update...

The work is now almost complete. As of Thursday, the scaffold has been removed. All the debris from around the bottom of the crane has been swept up and removed. All that remains to paint now is one side of the foot of the base and pick out details such as the main power and emergency stop switches. Once this is done, the site will be cleared and the temporary fencing removed. I'll get some pics of the crane in all it's glory as soon as I can. In the meantime, here's some pics taken a couple of weeks ago but which couldn't be posted.

From the top of the cab looking up at the jib. The second picture shows the air-raid siren which is sounded during the 40's weekends.

(https://i.imgur.com/uOafdvy.jpg)

(https://i.imgur.com/97C65So.jpg)

The power cable guide. The main 500V DC power supply is about halfway down the dock and this stops the power cable from being trapped on the rails.

(https://i.imgur.com/NjoEN8S.jpg)

The 'handbrake'. These are located on each corner and clamp the crane to its rails, preventing it from moving.

(https://i.imgur.com/oxbT4wr.jpg)

Emergency stop switch. There are three of these.

(https://i.imgur.com/99Eu0gE.jpg)

Traveller motor. There are two of these, in opposite corners. They are geared to the wheels. Note the brake shoes around the shaft. These are operated by the brake pedals in the drivers cab.

(https://i.imgur.com/hmJccXf.jpg)

Central bearing under the turret.

(https://i.imgur.com/RaknG4A.jpg)

Rollers which sit on top of the slew ring under the turret.

(https://i.imgur.com/79BI8a8.jpg)

(https://i.imgur.com/zt8A43i.jpg)

The down-side to all this is that the newly re-painted Dock Crane No 4412 (to give it it's proper title) now serves to show what poor condition the other cranes are in. I think the intention is to refurbish the other cranes, but this is dependant on funding.

(https://i.imgur.com/MUvHTLg.jpg?1)

(https://i.imgur.com/qBuDfYK.jpg?1)
Title: Re: No 10 Crane
Post by: Bilgerat on August 21, 2012, 16:11:51
This is now finished, the site has been cleared and the temporary fencing removed.

(https://i.imgur.com/mhYL35K.jpg)

(https://i.imgur.com/yOEuL8v.jpg)

(https://i.imgur.com/RBsaRJQ.jpg)
Title: Re: No 10 Crane
Post by: Sentinel S4 on August 21, 2012, 17:45:03
Wow. Thanks for the running commentary on the refit Bilgerat. It has been very interesting to see parts of the crane that are no longer in use, like the controls. Thanks again for your time taken in posting these great pics. Very interesting from an engineering point of view.

S4.
Title: Re: No 10 Crane
Post by: DaveTheTrain on August 25, 2012, 22:52:37
Thanks Bligey,  nice photographs.  What is in the space behind the crane cab?  I assume that it is either balance weights or had a space for the generator - I think it was self powered at one time.
Thanks
DTT
Title: Re: No 10 Crane
Post by: Bilgerat on August 25, 2012, 23:32:39
Hi DTT,

That's where the main winch and main distribution board live. The luffing and slew motors are under the cab. This one never had an on-board generator, it was entirely dependant on an external power supply.
Title: Re: No 10 Crane
Post by: DaveTheTrain on August 25, 2012, 23:58:22
Of course, that makes sense.  Any idea what voltage it ran on?
Cheers
DTT
Title: Re: No 10 Crane
Post by: Bilgerat on August 26, 2012, 01:16:44
It ran on 500v DC.
Title: Re: No 10 Crane
Post by: DaveTheTrain on August 26, 2012, 22:40:52
Thanks Bilegrat.  I wonder, was this powered from the DC generator in the South Pumping House.  I cannot think of another place the generator set could have been.  It would be reasonably easy to switch over to run the crane elecs when power was not required for the pumps.

Cheers
DTT
Title: Re: No 10 Crane
Post by: kyn on August 07, 2014, 20:49:18
Looking good! :)
Title: Re: No 10 Crane
Post by: Bilgerat on October 15, 2017, 12:58:11
I've restored the pictures I took during the restoration of the crane....
Title: Re: No 10 Crane
Post by: lutonman1 on December 02, 2017, 15:40:05
I read with interest the restoring of crane No 4412 on No 2 dock. I have driven this crane, mainly on
holiday relief duties. The ` hot plate ` allowed the drive to make tea, as well.  I believe the hot plate
was 240 volts, as most larger cranes ran on 440 volts. Lighting circuits 220/30 volts
The` Portal ` crane`s dotted about the dockyard, were named after Air Marshall Portal, for use after D Day.
They had a two gear system for the hoist control ` medium ` and ` very fast `. Most cranes had hot plates.
The crane behind No 4412 was a learning crane, which I learnt on. Later I became a crane instructor on
Portal Crane No 732, a 5 ton, on basin 2.
Title: Re: No 10 Crane
Post by: lutonman1 on March 26, 2018, 04:04:51
 For the record. The crane driver was Dave Poole. He left in 1983/4, he worked the crane for years.