3CX JCB 1997 Maintenance questions

Gecko

Gecko

Well-known member
There has been a few project 12 operators manuals on eBay in the last week.
Thanks - it's actually the P12 service manual I'm after.
My 3CX is a P8, but at some stage in it's life, its received the later P12 gearbox
 
T

topkit

Well-known member
Check out ebay item number 313420254914 for the project 12 partsbook, and 164642556025 for the operator handbook if They wont send it to OZ let me know and i will get it and post it over to you if that helps.
 
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Gecko

Gecko

Well-known member
Thanks for the offer - greatly appreciated.
My 3cx is a P8 except for the gearbox (P12).

I've ended up buying a P12 service manual as a PDF to save on the hassle of international delivery. That turned into a minor saga when the seller sent a link for the wrong manual, but (allowing for the time difference) supplied a new link quickly.

I've got the three manuals for the P8, so hopefully this has made a set!
 
Gecko

Gecko

Well-known member
Been meaning to ask - what does this switch do?
View attachment 10139
Trying to avoid doing some things around here, so I had a poke at the electrics.

The toggle switch indicated was hard wired to the revolving light on the roof - not the socket (there may have been one on the boom at some stage too).
The top right switch had been re-purposed for the fog lights - an odd choice as the machine has never had fog lights!
 
Gecko

Gecko

Well-known member
Been playing with the electrics - I know, always a good opportunity to make things worse!
I'm wondering if I put the replays back in the correct sequence as I now can't get it to turn over.

If someone with a P8 could take a pic of their fuse/relay box, it would serve as great reality check

Working through the part numbers on JCB's online parts list, the relays 'should look like this:
1614589437892.png

One of the relays (5) didn't switch properly, but measured correctly after cleaning the contacts (didn't help)
One relay was found to be a green (change over) type where a blue is spec'd, but that's ok - a green will work fine in place of a blue (but not the other way around).
 
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Gecko

Gecko

Well-known member
The fun job will be replacing the wear strips on the extra-dig. These have clearly been absent for some time running metal on metal - hopefully the wear won't cause a problem.

I assume the procedure is to fit the lower pads (as retracted as possible).
Insert the lower dipper and then position the upper pads.

Any suggestions or advice on this fun job? 🤪
Finally got the wear pads in.
Turns out what I was missing was beer.
With beer, enough mates turned up to man-handle it apart and back together again.

I'm now able to use the back end as well as the front and shorten the list of holes that needed digging.
 
Gecko

Gecko

Well-known member
Back in asia and out of quarantine. In the interests of confusing airline security, I've developed a habit of transport 'unusual' things in my luggage.
My next trip will include some hydraulic hoses.
Yesterday I had some spare time, so went shopping - including my local hose shop
1640840539749.png


£80 bought 12 hoses

1640840687630.png
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Back in asia and out of quarantine. In the interests of confusing airline security, I've developed a habit of transport 'unusual' things in my luggage.
My next trip will include some hydraulic hoses.
Yesterday I had some spare time, so went shopping - including my local hose shop
View attachment 30935

£80 bought 12 hoses

View attachment 30936
that's gonna piss 'em off :ROFLMAO::ROFLMAO:
 
Gecko

Gecko

Well-known member
I once found 8m of 10mm drag chain at the side of the A4232 - obviously I stopped and picked it up!
I found a small box (8m of chain doesn't take up much space), wrote my name on it and checked it in.

I got called back to security because they "couldn't see what was inside".
 
M

Monkeybusiness

Well-known member
I once found 8m of 10mm drag chain at the side of the A4232 - obviously I stopped and picked it up!
I found a small box (8m of chain doesn't take up much space), wrote my name on it and checked it in.

I got called back to security because they "couldn't see what was inside".
I took a real ball and chain (proper cannonball with 4 feet of chain and a steel locking ankle bracelet) in my snowboard bag to Andorra for a mate’s stag do. Had a word with the security guy when dropping my bag at Manchester airport and it got there no problem - the stag wore it the entire week when he wasn’t in his ski boots, it was a great success!
I just chucked it in my bag and didn’t mention it on the way home (still pissed, absolutely knackered, not massively conversational in the airport).
I was killing time in duty free waiting to be called to board when my name started being called out over the tannoy…. The long and the short of it was that I held up a fully loaded plane whilst security made me open my bag in a little building out on the apron next to the plane.
I didn’t feel hugely popular once allowed on and had to make my way the full length of the plane passed all the seated, knackered, fed up, delayed passengers who were witnessing the cause of their delay - a Hawaiian-shirted drunk dickhead stumbling to his jeering mates…
 
Lancs Lad

Lancs Lad

Well-known member
I once found 8m of 10mm drag chain at the side of the A4232 - obviously I stopped and picked it up!
I found a small box (8m of chain doesn't take up much space), wrote my name on it and checked it in.

I got called back to security because they "couldn't see what was inside".
Did it have a heavy tag?😂
 
Gecko

Gecko

Well-known member
.. as long as they hold together .
Yeah, that's been my concern.
I started with a set for the stabiliser legs (figuring a burst wouldn't be catastrophic) - so far, they've been fine.
I'm not a good enough operator to let anyone near where I'm working, so a burst hose shouldn't put anyone at risk.
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
I took hold luggage to Luanda once 40kgs no less one piece, an inch and a half bsp “C” top valve section for a leaking spud dump valve 4 days of clothes in hand luggage, as the “C” top and some adaptors filled the hold bag with lots of bubble wrap of course!
 
Gecko

Gecko

Well-known member
My boom ram has had in internal leak for some time. Despite having the seal kit on hand, I've been happily ignoring it.

Now the rod seal has sprung a leak which it rather forcing the issue.

My question: is it possible to extract the boom ram without disassembling the boom from the king post?
 
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