Dexta Injector Pump

Im new to this so please be gentle. Ive purchased a 1958 Ford Dexta to restore which has been verified through the serial # and casting #"s.It was running when i bought it but had a knock coming from the engine. Ive stripped down the engine and still the sump to drop to check the cranckshaft and bearings etc. Im going to check the cylinder bores for wear with a bore mic as well. Going with experience it didnt sound like a big end knock it was more like a diesel knock. Im going to renew the injectors while im at it. My question is regarding the injector pump. It has a CAV pump fitted. Is this right for the age of tractor as im told it should be a SIMMS pump fitted. Im going to check the pump timing to ensure it is correctly timed.Also would anyone have the same type of handbrake fitted to their Dexta. It is the type with the handbrake sector bolted to the right hand side of the gearbox/rear axle housing. This is missing on mine but the lever is there minus the pawl as well and would appreciate it if any one can tell me where i can locate these or if anyone can supply me with drawings and dimensions and i can get one made up.
 
Simms Motor Units was taken over by Lucas in 1968.
Lucas already owned CAV as of 1926. Simms was incorporated into CAV.

It would help if you could post a photo of the pump or find a picture of one by searching on Google images. More than likely the pump was replaced at least once or maybe several times.

1. The best way of telling what is going on is by getting the model number off the pump if you cannot post an image.

2. CAV makes/made inlne and rotary pumps. You might even have a CAV minimec pump which is inline. It is common that your engine was later fitted with larger sleeves so that it is now a Ford perkins 3.152 rather than a 3.144.

Is there a vacuum line leading from the rear of the pump to the intake manifold of the right side of the engine?

Original part numbers for the pump were 957E-993101-A, 957E-993101-B, or 957E-993101-C. I don't know if these numbers are on the pump itself.
 
Editing is still of so I had to add this post.

Early Perkins 3.144 engines had a CAV rotary pump. You might even have a Perkins replacement engine. Depends.

Check the serial number on the left bottom side of the block.
 
Hi Deutz Lover,
Many thanks for the reply. Ive got numbers but unable to load photographs for some reason. The engine serial # is 1129139 which leads me to believe it
is still the original engine and it is a 3.144 in the tractor but unsure as ive not been able to find any information as to engine serial numbers
fitted to the Dexta"s. The numbers and info on the pump are as follows BPE: 3A6OU320/3S6483F , DES# : 4322762, Serial # : R74YF or R7AYF. There is no
vacuum line from the back of the pump to the intake manifold.

Regards
Charlie.
 
Charliesdexta,

Thanks for responding on this nice Sunday.

All I have at this point is that a CAV BPE is an inline pump. You have provided enough information so that others with more information immediately at hand can join in. In the mean time I will try to get more information.
 
Many thanks for the reply Deutz Lover. Hopefully you or someone else can come up with more information. Im busy working offshore in Africa at the
moment and not due back to the U.K. until the 5th Nov so have plenty of time on my hands surfing the net for information and parts before i return to
the project again.
 
charliesdexta,

They may have equipped the ones on this side of the pond (USA) with different injector pump models. I checked my Ford/Fordson Dexta manual, but it was not very helpful so far as models.
The fact that yours has a mechanical governor is interesting in that it was the later models here that used this type. The P4588 used on the super dexta and finally the P4696.

This is why I think it was a later replacement unless the British used a mechanically governed pump on their early Dextas.
These pumps along with larger diameter liners gave more horsepower. I would like to replace my pumps with mechanically governed ones, but the replacement price is ot.

I just pulled the head off of a 59 Dexta and was happily suprised to find it had been fitted with larger liners making it have more horsepower. So my engine is almost a super Dexta except it has the original pneumatic governed injector pump plus the different cosmetics.
 
Deutz Lover,

Now thats an interesting piece of information. Ive also looked at the Dexta manual and it doesnt make things very clear. Ive been doing a lot of
digging this afternoon on the internet and according to information that ive found it seemed that the early Dextas were fitted with the Lucas CAV
injection pump and then were fitted with the Simms later on from around 1962.Ford produced all the casting etc for the F3.144 engine and these were
shipped to the Perkins factory for building and then shipped back to Ford at Dagenham. When Ford stopped producing the Dexta they sold the rights to
Perkins and they then produced the engine as a P3.144 which was fitted to the MF35 etc. At this time they then were fitted with the Lucas CAV
injection pump. This throws up the question then if my Dexta is fitted with its original pump or from a later version from a perkins engine. It will
be interesting to see if it has been fitted with the larger liners when i check the bores with the bore mic when i get back home in 3 weeks time
from my job out here in Angola.Having said that the bores look really good with no scoring or anything and tops of the pistons are good and clean.
Still going to drop the sump and check all the bottom end to ensure everything is okay i.e. bearings and crankshaft for wear. So fingers crossed and
hope all is okay and no need to rebuild the bottom end of the engine.
 
I don' know when the 59 Dexta was overhauled, but they had to bore the block for the larger liner. These liners are press the type while some others are a slip fit with a flange which would require counter boring. I note that the number 2 liner is a bit low and may have slipped. The only reason I pulled the head was the radiator failed and blew the head gasket. I hope that is all. I still have to check everything for flatness and probably replace the rings.
 
That is why I got the tractor so cheap.

I hope they get the editing function fixed. They had a server crash about a week ago.
 
I thought that Ford had specified Simms inline pumps from the beginning as part of their agreement with Perkins when producing the F3.144. But again this information came from the web so mistakes happen even historical documents.
 
Try fordsontractorpages.nl for your information. The Dexta was never fitted with a rotary pump from CAV but now some people have fitted the later Perkins engines as used in the MF135 which does have the rotary pump.

If you have no vacuum line you could have a Minimec pump and your tractor is much later than you think. The Minimec pump was used from 1962.

You really need the number from the clutch housing flange behind the injection pump and fuel filter, it will start 957E or even 09A (B) or (C) and some of the casting codes which are on all cast parts. The easiest one to find will be the one on the side of the gearbox housing, it is under a part number cast into the housing and will be something like A12H or possibly 3A12. Once you have found the number, post it on here and I can decode it and tell you the year of your tractor.

After 50+ years there are possibly many changes and modifications to your tractor. :0)
 
I have a late 40's or early 50's TE20 or TE30 Ferguson with a P3 Perkins. It has the in-line CAV pump. I have one Dexta and one Super Dexta running and 3-4 Dexta parts tractors. The Super Dexta is the only one with the Simms with mechanical governors, all others have the Simms inline with vacuum governors. I think all Dexta and Super Dexta's came from Ford with a Simms pump, Dexta with vacuum gov. and Super Dexta with mechanical gov. My logic, observation, and knowledge comes from my experience of the first imported Dexta into the USA in 1958 or so up thru 1964 when they stopped importing the Super Dextas.
Jim from Alabama
 
Since I had some extra time on my hands I revisited a post from 2015 and found I had made an error. I originally stated that in order to go from a 144 cubic inch displacement to a 152 cid the block had to be bored. This was in correct. Either the original liner was bored out or a new thinner liner was pressed in. The only thing that needed machinging was the top of the block had to be counter bored if a flanged liner was to be fitted.

The point was the parent bore was not bored out to a larger diameter. Sorry it took me that long to discover this.
 

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