The only problem I have with videos like this is that they never show up in RUclipss search results. On the positive side they do tend to show up in the recommended section a week later 😄
21 dislikes!! They must be mechanically braindead. Fantastic british engineering at its best. Perkins and c.a.v working together. Pleasure to watch. Restoring a massey ferguson 65, this has helped me understand the principles. Thankyou.
Ditto for me with a ’73 Ford industrial tractor. Some bozo had taken the input valve assembly for the transfer pump side, and instead of replacing a simple o-ring, tried to build a seal with silicone… I’ve been cleaning bits of that out of the whole works. Poor thing was being starved for fuel. One cleaning and one o-ring later, it makes fine pressure.
Excellent video, thank you very much! I am in a process of converting my marine Perkins 4.108 into a generator work horse and was trying to find information on CAV DPA hydraulic (which my motor has) and on mechanical pump (which I think I should get for generator use). This video explains all I need to know about these two types of CAV pumps.
Wow, been looking for a video like this for ages! Well explained. Thanks for uploading! I'm currently working on 1969 Perkins marine 4.236 for my sailboat. Absolutely invaluable.
Excellent presentation and show the internal workings of the CAV diesel pumps. The British are true masters in mechanical engineering. Love the vintage of the overall video clip. 1950's ?
Man what a great video! I can't imagine any other video explaining that pump any better. And its ancient!!! Who the heck found this and put it on RUclips? Thank you!
I should add that for those interested in the subtleties of the transfer pressure regulating valve (which is not covered in this film and which is complicated by the need to allow the pump to be primed by the lift pump) there is a good diagram and explanation about 2/3 of the way down this web page:- www.tb-training.co.uk/cisys.htm
Excellent! I'm in the process of disassembly and resealing a CAV 3-cylinder injection pump on a Ford 3600 tractor. This film helps me visualize and understand the operations of it's components. Thanks for posting. Is there a source for higher res versions of this film/video?
Very useful video. What I don't understand is how a worn pump can be reconditioned. As it wears presumably the fuel pressure within the pump housing increases and so inevitably the drive shaft seal will eventually be overloaded and leak into the sump. So unless all the worn components are replaced there will be no improvement in an old pump.
Thank you for the information. Allah bless you. Lucas pump is best pump in Africa countries. Even injectors is good in Africa. Thank you very much. Lucas for me is number one. Welcome welcome welcome. 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏📞📞📞📞📞🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏☝️☝️☝️☝️☝️☝️☝️☝️☝️☝️☎️☎️☎️☎️☎️
Thousands upon thousands of these still installed and in operation all over the world. I had reason to take a 1970’s version apart for service today, and I’ve got a dozen other pieces of equipment that use this design. I suspect this will be pertinent to mechanics and owners for a few more decades to come.
never mind Perkins engines, we used dpa pumps when i worked at AEC ltd on the av 505 engines and on some av760 engines dependant on customer requirements,
Every other video about fuel injection pumps should be required to have a link to this original Perkins technical sales/support film. The real question that everyone has is how do I get air out of the thing so the motor will start. Now I know what is going on inside the pump.
0:23 Perkins 6-288, basically a P6 with a CAV rotary pump, most were fitted to Allis Chalmers Gleaner combines, I fitted one of them into a T20 Ferguson.
nice job,,,,in the test room, is the test done with a prototype injector? or what the engine has...how will we measure the pressure of the transfer pump? and how will we know if the hydraulic head has lost its performance..thanks
@@nikutb6798 That is a very good question. On the vehicle its not going to be easy. Given that, in a conventional diesel engine, the injection system isn't trying to maintain a given fuel/air ratio (as it has to in a petrol injection system). The action of the governor probably masks moderate levels of leakage in the high-pressure pump. At a given throttle setting, if the RPM drops slightly because leakage is reducing the delivery to the injectors then the governor will open the control valve slightly and increase the fuel being delivered. I suspect a badly worn high pressure pump shows up first at idle where there is more time for the leaks to have effect and the fuel delivery per pulse is low. Back in the 1960s I did, as a kid, spend about a week watching what went on in a fuel injection repair shop and the pump testing was done without injectors on the outlets but with the outlets simply piped up to a set of measuring cylinders so that the flow rates could be measured. Presumably the assumption was that the pump, having been refurbished, wouldn't have any excessive leaks that would affect the delivery under injector back-pressure. Wear in the transfer pump is, I suspect, not a major issue. The transfer pump on a DPA pump, from my calculations, circulates through the regulator valve about 15 times the volume delivered by the high-pressure pump under maximum load. So the system should perform fairly normally even with moderate wear in the transfer pump.
I have gotten ahold of a old volvo tractor with perkins engine and cap dpi pump,its primed good and all but doesent spit fuel at the injector lines. been ununsed for 10+ years so i guess the plunger pistons are stuck in the old diesel. the throttle lever that adjust the fuel was a little stuck too. now i can tear into this and see whats wrong :)
If you pull the injector pump off the engine and manually spin it 600 RPM for so, you can often break them free due to centrifugal force and it'll start pumping again!
is there someone on this video that can answer a cav question i have about our case580e backhoe? the engine will only run when i operate any hydraulic, as if the hydraulic load causes the pump to work i guess? somehow i find this pump very complex and want to understand before i take it all apart, this is my current job and i dont know what to tell the boss
Hi all, I am trouble shooting a Bristol Taurus crawler (1950s era) which will only operate at full RPM. Perkins 3cyl engine, CAV BPE injector pump. Wondering if anyone has advice what could be causing this issue - the engine had been run out of fuel immediately prior to this issue arising so I am wondering whether something from the bottom of the tank has blocked/stopped something in the fuel injection pump? Many thanks
Well, I have a 35x tractor with the mechanical governor and if it is running light at 1700 rpm it will drop to perhaps 1500 rpm under full load. Quite remarkable for a purely mechanical system especially as it has no tendency to hunt even though the pump has 8500 hours on it.
The regulator valve allows the pump to be primed using the lift pump priming lever as far as filling the pump casing and the transfer pump but not the high pressure pump or the injector lines so the final stage of priming requires cranking to operate both the transfer pump and the high pressure pump. The lift pump priming lever is missing on my tractor so I have to do the whole priming job by cranking. With a fully charged battery this is no problem.
Lol, all their developmental work, ok sure. It's a Roosa master DB2 pump they built under license, just like the stanadyne pumps used by GM and Ford in their mechanical injection diesel pickups, in Ford tractors, and all kinds of stationary light engines. Those CAV units look like a direct copy of the Roosa labeled units in Ford tractors, ROFL
The distributor pump design was licensed from stanadyne. However anyone with more than a passing familiarity would know that a DPA and DB4 are different pumps.
@@tjsbbi db2, not 4, and Roosa had both the mechanical and hydraulic governing covered in his patents. The differences are very minor, the Roosa vane pump uses 4 blades instead of 2, the mechanical linkages in the governor racks are divergent, yet perform almost exactly the same. The db4 has a 4 plunger high pressure pump for greater volume, but the db2 is a dual plunger just like that dpa. Roosa also has pneumatic governing as an option, but it require an intake butterfly valve akin to a throttle body. The difference of the dpa in that film and the Roosa used in Ford light tractors is pretty much the top cover mounting, and plane of the fuel lever rotation. The dpa just uses a simpler main casting, and a "lower inventory count" lever and spring arrangement.
@@ludditeneaderthal my mistake then I was thinking of a DB4. I seem to remember them as having a substantially heavier barrel. The CAV DPA and DPC had a 4 vane transfer pump which may be the same as the DB4.
@@tjsbbi the stanadyne pumps run a gamut of sizes. The db2 on the Ford idi v8s are actually pretty tiny, the gm 6.2 v8 version is also "petite", lol. The 4 cyl White engine military genset model is a bit larger, and some stationary use models get pretty chunky. The Ford 4 cyl small tractor model is about the size of the Perkins CAV. I think that's just indicative of the versatility of the design, it's quite scalable for the job at hand, even if you only use the 2 roller variant. At least as scalable as the typical Bosch style " box, camshaft, and row of pump bodies" pump/governor rigs, and pretty much always lighter and cheaper. That DPA is actually a pretty nice variant, between the simplified castings and the "lean manufacturing" nature of the governing linkages, it seems nicely suited to modular use on a variety of engines and duties.
A lovely little pump nicely designed handsome. And Good look s.. yes had a few off I my time 302 303 212 152 perkins engs. 203 engines yeh a plane good eng was perkins.
Landini, mf, jd, ford, fiatagri, david brown, etc etc. A lot of agricultural productors adopted this fantastic pump. Thank you so much!!
The only problem I have with videos like this is that they never show up in RUclipss search results. On the positive side they do tend to show up in the recommended section a week later 😄
21 dislikes!! They must be mechanically braindead. Fantastic british engineering at its best. Perkins and c.a.v working together. Pleasure to watch. Restoring a massey ferguson 65, this has helped me understand the principles. Thankyou.
Ditto for me with a ’73 Ford industrial tractor. Some bozo had taken the input valve assembly for the transfer pump side, and instead of replacing a simple o-ring, tried to build a seal with silicone… I’ve been cleaning bits of that out of the whole works. Poor thing was being starved for fuel. One cleaning and one o-ring later, it makes fine pressure.
same pump is Used in Peugeot 404 1.9D (Indenor engine)
Finally an old school type video, reminds me of my army days, Just what I needed to solve fuel issue on 1975 Ford 3000.. Thanks
Thanks for posting your video helped me fix my 4-236 Perkins leaking throttle shaft, first repair its needed in 52 years thanks again so much.
Brilliant video; clearly explained as only Brits used to in the mid 20th century, with sectioned models and graphics.
Thanks for taking the time to post this. It's ancient, but excellent. Helped me understand the pumps on my boat and diagnose the issue I was having.
Thank you for taking the mystery out of this pump!
+dskebo I'm glad I decided to post it then. You're welcome :)
Finally, one great film on this issue!!
Excellent video, thank you very much!
I am in a process of converting my marine Perkins 4.108 into a generator work horse and was trying to find information on CAV DPA hydraulic (which my motor has) and on mechanical pump (which I think I should get for generator use). This video explains all I need to know about these two types of CAV pumps.
Wow, been looking for a video like this for ages! Well explained. Thanks for uploading! I'm currently working on 1969 Perkins marine 4.236 for my sailboat. Absolutely invaluable.
Very simple but very effective!! Thanks for the upload, shame that the majority of people in England now speak riff-raff!
Excellent presentation and show the internal workings of the CAV diesel pumps. The British are true masters in mechanical engineering. Love the vintage of the overall video clip. 1950's ?
Lolz.......it's a poorly made knock off of a Roosa Master pump!
very nice video we still repair these pumps on a daily bases.
Ahh the good ol days of simplicity how i wish you were still here
Oh man! This was so helpful for getting my head wrapped around how my CAV pump works. (or rather, why it isn't working at the moment)
very nice and knowledge full vidio.excellent work
Excellent show 👏 very helpful
The same pump is used on my 1972 FORD 4500 Backhoe. Great Video. Thanks!
I have worked a lot servicing these pumps ! Immediately impressed by them!!
Thanks for posting. My sailboat has a Perkins diesel with a DPA pump. Clear and accurate info.
Oh really.....
Man what a great video! I can't imagine any other video explaining that pump any better. And its ancient!!! Who the heck found this and put it on RUclips? Thank you!
Many thanks - extremely useful and a great reminder of all the instructional films they showed at my school and tech college!
I should add that for those interested in the subtleties of the transfer pressure regulating valve (which is not covered in this film and which is complicated by the need to allow the pump to be primed by the lift pump) there is a good diagram and explanation about 2/3 of the way down this web page:-
www.tb-training.co.uk/cisys.htm
Love this video. Explained a lot to a non diesel person. Thanks
Excellent! I'm in the process of disassembly and resealing a CAV 3-cylinder injection pump on a Ford 3600 tractor. This film helps me visualize and understand the operations of it's components. Thanks for posting.
Is there a source for higher res versions of this film/video?
Very useful video. What I don't understand is how a worn pump can be reconditioned. As it wears presumably the fuel pressure within the pump housing increases and so inevitably the drive shaft seal will eventually be overloaded and leak into the sump. So unless all the worn components are replaced there will be no improvement in an old pump.
VERY GOOD VIDEO I have CAV pump on my old Peugeot 404 1.9D indenor diesel. Its pure mechanical.
that is a awesome video of what I call old school.very informing.
Thank you for the information. Allah bless you.
Lucas pump is best pump in Africa countries. Even injectors is good in Africa.
Thank you very much. Lucas for me is number one. Welcome welcome welcome.
🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏📞📞📞📞📞🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏☝️☝️☝️☝️☝️☝️☝️☝️☝️☝️☎️☎️☎️☎️☎️
Spiffing!
Thank you old chap!
thank you so much for explanation, Jesus bless you all
Great show and tell on this CAV injection pump, Thanks
Thank you from Dominican Republic
Your my hero man... Thank you for these
GREAT PUMPS IN THERE TIME BUT TODAY ITS ALL CDI INJECTION SYSTEM, BRITSH ENGINEER WAS VERY CLEVER ,
Thousands upon thousands of these still installed and in operation all over the world. I had reason to take a 1970’s version apart for service today, and I’ve got a dozen other pieces of equipment that use this design. I suspect this will be pertinent to mechanics and owners for a few more decades to come.
Excellent video. Thanks for uploading.
Excellent video, very informative, thank you.
never mind Perkins engines, we used dpa pumps when i worked at AEC ltd on the av 505 engines and on some av760 engines dependant on customer requirements,
So simple and effective!
Every other video about fuel injection pumps should be required to have a link to this original Perkins technical sales/support film.
The real question that everyone has is how do I get air out of the thing so the motor will start. Now I know what is going on inside the pump.
0:23 Perkins 6-288, basically a P6 with a CAV rotary pump, most were fitted to Allis Chalmers Gleaner combines, I fitted one of them into a T20 Ferguson.
those 20 min explain what our old professor can not in 2 hour XD
superb explanations, thanks alot
nice job,,,,in the test room, is the test done with a prototype injector? or what the engine has...how will we measure the pressure of the transfer pump? and how will we know if the hydraulic head has lost its performance..thanks
I think you will find that the lower of the two bleed nipples is at transfer pump pressure and the upper is at lift-pump pressure.
@@ColinMill1 how will we know if the hydraulic head has lost its performance..thanks
@@nikutb6798 That is a very good question. On the vehicle its not going to be easy. Given that, in a conventional diesel engine, the injection system isn't trying to maintain a given fuel/air ratio (as it has to in a petrol injection system). The action of the governor probably masks moderate levels of leakage in the high-pressure pump. At a given throttle setting, if the RPM drops slightly because leakage is reducing the delivery to the injectors then the governor will open the control valve slightly and increase the fuel being delivered. I suspect a badly worn high pressure pump shows up first at idle where there is more time for the leaks to have effect and the fuel delivery per pulse is low.
Back in the 1960s I did, as a kid, spend about a week watching what went on in a fuel injection repair shop and the pump testing was done without injectors on the outlets but with the outlets simply piped up to a set of measuring cylinders so that the flow rates could be measured. Presumably the assumption was that the pump, having been refurbished, wouldn't have any excessive leaks that would affect the delivery under injector back-pressure.
Wear in the transfer pump is, I suspect, not a major issue. The transfer pump on a DPA pump, from my calculations, circulates through the regulator valve about 15 times the volume delivered by the high-pressure pump under maximum load. So the system should perform fairly normally even with moderate wear in the transfer pump.
@@ColinMill1 thanks..greetings from GREECE
thanks for uploading this video, very clarifying
Thanks for posting this video
Thank you very much for this video! \o/
+André Squinzani You're welcome \o/ :)
bellissimo filmato
Thanks for this treasure
definetely awesome
Amazing ! Thanks for uploading.
very informative thank you,
go fix it now😂
Whoever thought of this was a genius.
Excelente!!! Gracias
Great sir
I have gotten ahold of a old volvo tractor with perkins engine and cap dpi pump,its primed good and all but doesent spit fuel at the injector lines. been ununsed for 10+ years so i guess the plunger pistons are stuck in the old diesel. the throttle lever that adjust the fuel was a little stuck too. now i can tear into this and see whats wrong :)
If you pull the injector pump off the engine and manually spin it 600 RPM for so, you can often break them free due to centrifugal force and it'll start pumping again!
@@stanRmeyer thank's, I'll try that on mine, I have the same problem on an old bmc engine that's been stood for year's.
@@edwardkennedy9919 I hope that helps it's a tip that an injection pump specialist once told me when I was troubleshooting with him!
SO USEFUL THANKS!!!
is there someone on this video that can answer a cav question i have about our case580e backhoe? the engine will only run when i operate any hydraulic, as if the hydraulic load causes the pump to work i guess? somehow i find this pump very complex and want to understand before i take it all apart, this is my current job and i dont know what to tell the boss
I have same CAV DPC pump on my Peugeot 404 with indenor XD88 engine from Indenor
Thanks very much
Excellently presented. Do you know what year it was produced?
+B815SX By the vehicle model present in the film, is posible the year 1955 60
+B815SX Not sure of the year, sorry.
The line of Commer FC series 1 vans shown at 0:54 suggests it can't be before 1960.
beautiful engineering. subbed!!
Thank you mate. Very well put video.
+paulmagnnum Thank you :)
And I thought there was magic inside!
Exelente gracias
Nice
ile
Taka. Pompa
Wytrzymie. Motogodzin
Asalamaleikum brothers and sisters !! Peugeot 404 1.9D XD85 XD88 has the same INJECTION PUMP.
I LOVE C.A.V. PUMPS. I' M FROM BRASIL.
Thanks a lot!
Thank you
goood , thanks
Hi all, I am trouble shooting a Bristol Taurus crawler (1950s era) which will only operate at full RPM. Perkins 3cyl engine, CAV BPE injector pump. Wondering if anyone has advice what could be causing this issue - the engine had been run out of fuel immediately prior to this issue arising so I am wondering whether something from the bottom of the tank has blocked/stopped something in the fuel injection pump? Many thanks
did you get it fixed?
Okay I got a dumb question, if the hydraulic governor is far simpler, why use the mechanical type? He says it's more precise but what does that mean?
Well, I have a 35x tractor with the mechanical governor and if it is running light at 1700 rpm it will drop to perhaps 1500 rpm under full load. Quite remarkable for a purely mechanical system especially as it has no tendency to hunt even though the pump has 8500 hours on it.
تم
Yes good
But what if you press the priming knobb? Well the fuel bypass everything. The priming pin can get stucked and mess up motor
what? im trying to understand
The regulator valve allows the pump to be primed using the lift pump priming lever as far as filling the pump casing and the transfer pump but not the high pressure pump or the injector lines so the final stage of priming requires cranking to operate both the transfer pump and the high pressure pump. The lift pump priming lever is missing on my tractor so I have to do the whole priming job by cranking. With a fully charged battery this is no problem.
Czy
Te. Pompy. Trzeba. Ustawiać. Na1. Tlok
Czy. Te. Pompy. Są. Lepsze. Od. Bosza. Są. To. Pompy. Perkinsa. Muszą. Miec. Dobre. Paliwo. Bez. Wody.
Szkoda. Ze. Ten. Film. I rozmowa? Nie. Jest. Po. Polsku. Poland
NELLA MIA VITA HO RIPARATO MIGLIAIA DI POMPE DPA DPS DPC
DP200 PRIMA IN AFRICA
ORA IN ITALIA FIRENZE
Trzemu. Zastosowano. Pompy. Rotacyjne. A. Nie. Bosza
ممكن بلغة العربية
This was all by my granddad
Ok
Lol, all their developmental work, ok sure. It's a Roosa master DB2 pump they built under license, just like the stanadyne pumps used by GM and Ford in their mechanical injection diesel pickups, in Ford tractors, and all kinds of stationary light engines. Those CAV units look like a direct copy of the Roosa labeled units in Ford tractors, ROFL
The distributor pump design was licensed from stanadyne. However anyone with more than a passing familiarity would know that a DPA and DB4 are different pumps.
@@tjsbbi db2, not 4, and Roosa had both the mechanical and hydraulic governing covered in his patents. The differences are very minor, the Roosa vane pump uses 4 blades instead of 2, the mechanical linkages in the governor racks are divergent, yet perform almost exactly the same. The db4 has a 4 plunger high pressure pump for greater volume, but the db2 is a dual plunger just like that dpa. Roosa also has pneumatic governing as an option, but it require an intake butterfly valve akin to a throttle body. The difference of the dpa in that film and the Roosa used in Ford light tractors is pretty much the top cover mounting, and plane of the fuel lever rotation. The dpa just uses a simpler main casting, and a "lower inventory count" lever and spring arrangement.
@@ludditeneaderthal my mistake then I was thinking of a DB4. I seem to remember them as having a substantially heavier barrel. The CAV DPA and DPC had a 4 vane transfer pump which may be the same as the DB4.
@@tjsbbi the stanadyne pumps run a gamut of sizes. The db2 on the Ford idi v8s are actually pretty tiny, the gm 6.2 v8 version is also "petite", lol. The 4 cyl White engine military genset model is a bit larger, and some stationary use models get pretty chunky. The Ford 4 cyl small tractor model is about the size of the Perkins CAV. I think that's just indicative of the versatility of the design, it's quite scalable for the job at hand, even if you only use the 2 roller variant. At least as scalable as the typical Bosch style " box, camshaft, and row of pump bodies" pump/governor rigs, and pretty much always lighter and cheaper. That DPA is actually a pretty nice variant, between the simplified castings and the "lean manufacturing" nature of the governing linkages, it seems nicely suited to modular use on a variety of engines and duties.
It's a direct ripoff of Vernon Roosa's pump that he developed in 1941.
M
A lovely little pump nicely designed handsome. And Good look s.. yes had a few off I my time 302 303 212 152 perkins engs. 203 engines yeh a plane good eng was perkins.