Lucas Cav Pump Help needed.

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mickdoc6238
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Lucas Cav Pump Help needed.

Post #1 by mickdoc6238 » Mon Jan 23, 2017 3:44 pm

Hi Guys
Trying to put back the Top plunger thing on my lucas Injection pump rack and un-sure which way the Cap thing goes into the spring.I have tried fitting it with the longer side going into the internal of the pump but the spring is making it almost impossible to catch a tread and get it seated.
Unsure now which way it came out :doh:

Spring is pictured up-side down.
Thanks any help on this as really unsure now what to do.
Mick
Last edited by mickdoc6238 on Mon Jan 23, 2017 8:51 pm, edited 1 time in total.

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Re: Lucas Cav Pump Help needed.

Post #2 by mickdoc6238 » Mon Jan 23, 2017 3:46 pm

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Re: Lucas Cav Pump Help needed.

Post #3 by FOWLER MAN » Tue Jan 24, 2017 10:52 am

Hi, this may help.
Fred
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Re: Lucas Cav Pump Help needed.

Post #4 by mickdoc6238 » Tue Jan 24, 2017 2:12 pm

FOWLER MAN wrote:Hi, this may help.
Fred


Thanks Fred but this Pump is slightly different.That really did help with the JCB but (I think its called ) a sleeve guide plug (4) has a long treaded allen key bolt on one side but I am sure it fits in the Spring,it's just I do no understand why and thought I may have got them swapped around the wrong way.

Another quick question you will be able to help me with.
I am just removing the Cav pump to take a look at it to see why no fuel is getting to my injectors and give a clean but I cannot shift it off the spline that goes into it.All the connections are off,3 bolts removed, it's loose and turning but will not slide off.
I have tried to slide it with a couple of screw drivers in the gaps,gave it a few gentle taps with a hammer but it will not slide off for love or money.
Could this be my problem with not fuel getting though and the Shaft or somethings broke in side and it's jammed on.

Have you ever had this problem ?
Mick

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Re: Lucas Cav Pump Help needed.

Post #5 by FOWLER MAN » Tue Jan 24, 2017 5:42 pm

Hi,
You have a pump with the regulating adjustment for the transfer pump pressure, (see below).
I can't think why you shouldn't be able to withdraw the pump unless it's the type with a tapered shaft keyed and bolted to the timing gear instead of the quill shaft. I know some Ford engines were fitted that way.

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Re: Lucas Cav Pump Help needed.

Post #6 by mickdoc6238 » Tue Jan 24, 2017 8:13 pm

FOWLER MAN wrote:Hi,
You have a pump with the regulating adjustment for the transfer pump pressure, (see below).
I can't think why you shouldn't be able to withdraw the pump unless it's the type with a tapered shaft keyed and bolted to the timing gear instead of the quill shaft. I know some Ford engines were fitted that way.

Image



That's the one.....thank you for this it confirms I was putting it back correctly although I was hoping I had made a mistake as it could have been my problem with the pump.
Cheers for this Fred.
The engine is a Perkins and I am really at a lost of how to get the pump off.I am pretty sure now there is a problem with the Cav pump now so will have to get it off some how......is it me or do I just have the worst luck with these Pumps.
Thanks again for your time :thumbup:
Mick


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Re: Lucas Cav Pump Help needed.

Post #7 by tom262 » Wed Jan 25, 2017 12:45 am

hi you need to take of water pump ,and behind it there is a nut u have to take off ,you might need a puller for gear but i usually top it with a hammer .good luck

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Re: Lucas Cav Pump Help needed.

Post #8 by mickdoc6238 » Wed Jan 25, 2017 7:34 pm

tom262 wrote:hi you need to take of water pump ,and behind it there is a nut u have to take off ,you might need a puller for gear but i usually top it with a hammer .good luck


Thank you Tom
Just removed the water Pump and a Cover.....is tis the Nut you mention.It's a 22mm.
I have not tried yet to remove the Cav pump as it's too dark in the Barn now but how should I proceed now as I do not have a puller and may go your hammer route.
Mick




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Re: Lucas Cav Pump Help needed.

Post #9 by tom262 » Wed Jan 25, 2017 8:19 pm

yes mick thats the correct nut,if u slacken it and top it then u will nut damage the threads regards tom


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Re: Lucas Cav Pump Help needed.

Post #10 by tom262 » Wed Jan 25, 2017 8:44 pm

mick would you have engine number as you may have to set pump timing and lock pump before removing


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