Charlie's Echo (6)

Filed under: truck by tamber
23 Gorffennaf 2019 @ 00:00

Brake Bisectors!

So, at the end of the last installment, I said I was going to look at the brake bisectors. Well, I did that.

A lump of rusty metal sitting on a workbench, there are two studs
sticking out of it, and a hole where a third should be. The central
stud is much longer, and fitted to what appears should be a movable
plunger.

Mm, that's not ideal. And neither's this, the rear brake cylinder:

A photograph of the end of the rear brake actuator, showing a
horrible greasy rotten mess.

More cleaning needed.

The other side of the brake bisector, post cleaning, showing the
housing fully de-rusted, and the movable plunger with its rollers is
now free to move.

Much better.

March 2017

Hey, look what I've got!

Photograph of a desk, with two yellow cardboard boxes sat on
it. The boxes are labelled, in dark blue text, 'Lucas Girling'.

Photograph of an item wrapped in brown waxed anti-corrosion paper.

Wonder what's inside?

A transverse brake cylinder laying on unwrapped waxed
anti-corrosion paper. There are two spring retainers hanging off a
protrusion, that are meant to retain the rubber boot on the back.

Mmm, transverse brake cylinders.

Later...

Time to make a hub nut socket!

A chunk of pipe crudely machined into a specialised socket, with
6 stuck-out lugs on it, for use on the axle hub nuts.

...and go stick the hubs back on, now with new seals and shiny black paint...

Rear axle now with the hub refitted, with no brake parts.

Stick the wheels back on, discover I forgot to put the conical washers on first, curse profusely, take them back off, fit the washers, re-fit the wheels, etc.

A hand holding a wheel-nut, and a tapered washer, in front of the
wheels that have been refitted to the hub.

Late March 2017

Off-side rear hub time now! And hte drum didn't want to come off, so I took the whole lot -- hub and drum -- off in one go. Then persuaded it to come off with a big hammer.

A brake drum on the workshop floor, with the hub dropped down
inside it, and the bearings protected by rags.

Then I celebrated my success -- and the annoying of the entire workshop with my thumping -- by wiring up the other sidelight. Noice!

The front of the truck, now with both headlights and both
sidelights illuminated.

The hub was descaled, primed, painted, and fitted with a new seal... now with the use of my artisanal hardwood mallet:

Hub upside down on the workbench, with a new seal in it. Laying
atop the hub is a crude wooden mallet made by screwing a large bolt
into a block of hardwood timber.

Here, have another video! It's likely to be a total waste of nearly an hour of your life, but hopefully it's a bit entertaining watching me struggle:

So, what next?

How about, uh, inspecting the diff of the rear axle... which was in no way because I forgot the bottom two bolts of the diff cover are actually the drain-plugs, and just zipping them out from the top.

Truck's rear diff, with the cover removed, exposing the
ring-gear. Two streams of oil continue to pour out of the bottom two
bolt-holes in the casing, whipped about by the wind.

Oil doesn't look bad!

Gear oil in a blue plastic drain-pan. There is a very slight
golden sheen visible in the oil.

Diff cover looks like it's seen some excitement!

Inside of the diff cover, showing a corner that has previously
been welded to repair a hole; with a distinctive weld-puddle shape,
and a rainbow of heat-affected metal surrounding it.

Repaired corner of the diff cover from the outside, with a
definite outwards lump, as if something has been driven into the cover
from the inside with significant force.

All in all, a bit shabby and in need of some tidying.

Exterior of the diff cover, showing rust, flaking paint, and
general grot.

Better!

Exterior of the diff cover now having been jetwashed, blowing off
large amounts of the flaking paint and revealing hand-painted
lettering reading OEP 220.

The diff cover almost entirely repainted black, except for a
square patch where the hand lattering is painted on, and refitted to
the back axle.

Mid-April 2017

Let's have some light!

The back of the truck, now with two new rear light clusters
fitted.

And a bit of light philosophy:

Tamber said: (Side-note: Apparently, their go-to place for information on these bits has most of its knowledge-base residing in the head of a man named Frank, who's only in on Tuesdays. It scares me a little just how much information is contained solely within the Franks of this world.)

SeanN said: There is an old saying - "when an old man dies, it's as though a whole library has been burnt". I wish there was some way of downloading the knowledge of the Franks of this world. Forums like this are a start.

ZeroFiveTwo said: Unfortunate but very true. The main problem is, the stereotypical Frank is an unassuming bloke who is quite modest and doesn't see himself, or his knowledge, as being anything special. He does what he does, but no one notices until after he's gone

Tamber: Very very true, unfortunately. :(

(Same with all those parts places that are wall to wall shelves with scruffy little cardboard boxes, and the old guy behind the counter who knows where everything is; even if you're looking for that 1958-only counter-clockwise turbo-retro-encabulator that's just a strange assembly with spinny bits and a collection of springs to everyone else.

Then the Franks pass on, and you get left with the spotty young kid who's job is apparently just to tell you that the computer can't find the part you need because it doesn't recognise your chassis or registration number.)

Anyway, there was a bit of furtling about with the little control valve for the air-assist in the servo. It didn't really come to anything. I sort-of have an idea of what's supposed to be in there, but nothing close enough to concrete dimensions to make a replacement. So the current plan is to fit an external foot valve from a more modern truck alongside the original brake servo, controlled by the same brake linkage. Details yet to follow.

(It also has the advantage of inherently giving me air brake control to a trailer, which is something that I wanted to add in anyway.)

In other little items, one of the members from HMVF, Ian43, managed to figure out what sort of key was needed for the locking fuel cap, and then...

Early-May 2017

The fallout from "Part No. 42" finally hits me.

I went to double-check and re-set static timing, just in case I'd screwed something up (fnar.), and as I barred the engine over, there was a thunk and it stopped dead.

Pulled out the spark-plugs, and it started to turn over again; wound it over on the starter, and fuel squirted out. Note, not fuel mist, but liquid petrol.

Some checks were made, and I spotted fuel dribbling down onto the throttlep-late. Did the usual wishful-thinking fix of tapping the float-bowl with a screwdriver; nothing improved.

"Ah, fuel pressure's maybe a little high..." thinks I, in a full on muppet moment, completely forgetting that the electric pump was meant for carburettors and that sort of issue would've reared its head sooner anyway.

So a pressure regulator was ordered, and fitted. And the problem persisted, even with the pressure set to 1psi.

A co-worker suggested a stuck float (which is what I originally thought, hence the tapping), and the float-bowl was removed. Float wasn't sticking, but fuel did seem to be pouring out unless it was held at a certain angle.

Let's have a wee game of Spot the Difference, followed by -- more foreshadowing -- a game of Hide and Seek.

Venturi side of the emulsion block after the carb rebuild:

Carburettor, with 5 screws in a metal plate. 4 of them close
together, the 5th at the bottom of a protrusion from the plate.

Venturi side of the emulsion block this afternoon:

Same carburettor, with now only 4 screws in the metal plate. The
fifth screw, supposed to be in the bottom of the plate, beneath the
protrusion, is missing.

There is only one place that screw could have gone. I'm going to break out the inspection camera and go on a hunt for it. I'm not getting my hopes up too much, but I shan't despair yet. (In any case, does anyone know what size and thread that screw is, then I can order a replacement?)

And some more oil, because the sump has more petrol in it than the tank does, at this point...

To Be Continued...