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bosch ve pump rebuild
#1
Not really a guide, but some pics and comments which might be useful.

Rebuilt a 9mm bosch ve today - main shaft seal was knackered, pissing fuel out.

Only way to replace this easily is to strip the entire pump.

Tried to take some pics as I went along then forgot.

Didn't go smoothly tbh.

[Image: IMG_3359_zps60493f86.jpg]

Case has quite deep wear marks from roller cage, won't be much good for advance mods. Fairly low milage pump too, supposedly less than 90k

[Image: IMG_3364_zps9ce455cc.jpg]

Old seal, torn and basically screwed!

[Image: IMG_3366_zps500fc457.jpg]

New seal in, thats what I came here to do Smile

[Image: IMG_3370_zpsd8e6d8d6.jpg]

Re-assembling - can see the vanes here

[Image: IMG_3371_zps9051d707.jpg]

[Image: IMG_3372_zps7ecf8987.jpg]

replaced these little rubbers

[Image: IMG_3373_zpscba28929.jpg]

woodruff key for the vane pump

[Image: IMG_3374_zpsfacbbcb4.jpg]

main shaft in

[Image: IMG_3375_zpsecc48479.jpg]

roller cage in

[Image: IMG_3376_zps0f9ea231.jpg]

and roller bearings ...

[Image: IMG_3377_zps0c3b829d.jpg]

Original 9mm head plunger - not in great condition, looks like bits of crap have been through the pump - poss why it decided to seize, i have no idea.

[Image: IMG_3379_zps39ddc123.jpg]

torques for all the parts of the pump - triangle bolt (12Nm) and top hat (2/3Nm) are not done up very tightly at all, same for bolts that secure the head to the pump. Over tightening can cause leaks. Delivery valves however are pretty tight, around 50Nm

[Image: IMG_3380_zps9c41ff3a.jpg]

Gov mod, pretty much solid!




Plunger in the head decided to seize somewhere along the rebuild and I actually snapped it trying to free it.

Thankfully I have a load of 9mm heads sitting around so picked up a spare and dropped that in.

There must be two types of 9mm head on these, they have 2 different shaped keyways that lock into the camplate. One is more square shaped on the plunger than the other. So you have to put the matching camplate in with the head. I had my digital verniers out, but seem identical in terms of profile, although they do have different part numbers.

Also when I restarted it, it went to rev out / run away

Took a good 2/3 turns of the max fuel screw to bring it down to fast idle.

So imagine the control collars must sit in two different positions between the heads too.

Have noticed that some standard ve pumps have loads of thread on the fuel screw and some almost none left.

Anyway, bit of a faff but seems to be running now. Was hoping to put it back exactly to standard, as had left all the adjustments screws as they were. But now who knows where it is in terms of setup :/

Resealed the lot, chucked in a gov mod and couple of other little mods while I was in there.

At least it doesn't seem to be leaking anymore
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#2
Looking good. Wink
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#3
Good guide,

Just to note tho,

If the main shaft seal goes / rest of pump is fine and you need a quick fix, you can fairly easily change it without stripping pump, infact you dont even need to remove the pump frm the car, just put a screw in it, and pull it out / tap new one in, Smile

A full reseal is always worth it tho if you have the time Smile
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#4
(05-10-2013, 11:20 AM)darrenjlobb Wrote: Good guide,

Just to note tho,

If the main shaft seal goes / rest of pump is fine and you need a quick fix, you can fairly easily change it without stripping pump, infact you dont even need to remove the pump frm the car, just put a screw in it, and pull it out / tap new one in, Smile

A full reseal is always worth it tho if you have the time Smile

Ahh top tip that, have tried getting the seals out in place before and made a farce of it. Had a big screwdriver on this one levering it out, and nearly took my face out when it popped, ricocheted round the walls good and proper :p


Pics of the snapped head

[Image: IMG_3386_zps800d8dd3.jpg]
[Image: IMG_3387_zpsd48a2d90.jpg]
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#5
lol wow how did you snap the head?! good effort, was this going down on a crooked angle or different camplate.
Good stuff good to pull them apart and get the details of how they work Big Grin there are normally two kinds of camplate/plunger types, one with 4.5mm pin and one with 4mm pin, these have to be matched (I have put them together differently before and they basically fused together lol) but you know what you're doing. Thanks for the input on the seal Darren.
[Image: 22f2b6b2-758b-4c1c-96fb-6fa9c6059b13_zpsf306b56b.jpg]
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#6
Sorry to bump an old thread but where did you get the seal from and how much?
After finally getting my car running properly i discover the seal is knackered..
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#7
can pick them up from any diesel specialist, £10-£15 for a complete kit

or you can pick up from ebay, but they tend to be overpriced for what they are and don't usually include a main shaft seal
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#8
Theres a Bosch dealer in Northampton that I used to get mine from for 7 quid, worth checking up on if they would post. I was just local to them
[Image: 22f2b6b2-758b-4c1c-96fb-6fa9c6059b13_zpsf306b56b.jpg]
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#9
(06-04-2014, 10:20 PM)sweeney1987 Wrote: Sorry to bump an old thread but where did you get the seal from and how much?
After finally getting my car running properly i discover the seal is knackered..

Transport Supplies in Duncrue, Belfast is where I got mine.
There is also a Bosch fella in Stewartstown, Co Tyrone who should be able to get you the kit- Bit closer to you.

In saying that there is bound to be a bosch supplier in Cavan somewhere, considering you's are all farmers needing tractors serviced lol
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#10
(07-04-2014, 08:58 AM)anto Wrote:
(06-04-2014, 10:20 PM)sweeney1987 Wrote: Sorry to bump an old thread but where did you get the seal from and how much?
After finally getting my car running properly i discover the seal is knackered..

Transport Supplies in Duncrue, Belfast is where I got mine.
There is also a Bosch fella in Stewartstown, Co Tyrone who should be able to get you the kit- Bit closer to you.

In saying that there is bound to be a bosch supplier in Cavan somewhere, considering you's are all farmers needing tractors serviced lol

dont know of any really, my uncle is actually the main man around here for tractor parts but doubt hed have it...

might try here in dublin though... there a specific part no. i need off pump? or are all same?

Also whats the chances of the bush being gone? it leaking very badly
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#11
Haha 7 quid, i paid 18 on ebay for a genuine bosch one Sad could of got it for 14 i think was the cheapest but no gaurantee it was genuine Undecided
Doesnt even own a 306.
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