ACMOC
Login
ACMOC
Perkins bleeding woes

Perkins bleeding woes

Showing 1 to 6 of 6 results
Arborigine
Topic Author
Offline
Send a private message to Arborigine
Posts: 81
Thank you received: 0
I pressure bled my D2 injector system by pressurising the tank with no problem. Fired right up.
I have a Massey Ferguson MF30 with a Perkins AD-4 engine. previous owner passed on, and don't know why it wasn't running when i got it. I have followed recommended procedures and tried bleeding it (a lot) and starting it with no luck but do get fuel vapor from exhaust. I pulled an injector today to make an adaptor for my diesel compression guage at work tomorrow and when removing return line discovered that only two injectors were full of fuel. Has anyone tried pressure bleeding a perkins pump? or know if that will damage it? I will make a pressure tank to put 50-80 PSI in the system tapped in from the pump inlet, the pre-pump diaphram probably can't handle it.
Please log in or create an account to join the conversation.
Wed, Aug 31, 2011 10:55 AM
Mike Walsh
Offline
Send a private message to Mike Walsh
Posts: 417
Thank you received: 0
I don't know what make injection pump you have but you might want to look around on the pump for a bleed screw first. On CAV pumps I bleed the pump before I bleed the injectors. Its hard to pump fuel when the pump has lost its prime.
Please log in or create an account to join the conversation.
Wed, Aug 31, 2011 12:23 PM
Arborigine
Topic Author
Offline
Send a private message to Arborigine
Posts: 81
Thank you received: 0
Reply to Mike Walsh:
I don't know what make injection pump you have but you might want to look around on the pump for a bleed screw first. On CAV pumps I bleed the pump before I bleed the injectors. Its hard to pump fuel when the pump has lost its prime.
I have followed the procedure in the Perkins manual, and just haven't managed to get two injectors to bleed without running out of battery first. I'm hoping that once that is solved it will fire off. The system is a lot sillier than Cat's.
Please log in or create an account to join the conversation.
Wed, Aug 31, 2011 12:37 PM
AJ.
Offline
Send a private message to AJ.
Posts: 314
Thank you received: 0
Reply to Arborigine:
I have followed the procedure in the Perkins manual, and just haven't managed to get two injectors to bleed without running out of battery first. I'm hoping that once that is solved it will fire off. The system is a lot sillier than Cat's.
Careful,Cat own Perkins,I do not think that pressureizing the fuel system would be advisable,the CAV rotary pump is fuel lubricated meaning that the body of the pump is full of fuel and depends on a seal on the input shaft to keep it out of the engine,pressureize it and you may blow the seal out,start by making sure there is a unrestricted flow of fuel leaving the tank,take the top off the feed pump and clean the gauze and pump body,fit new filter/s,open all the bleed screws,one on each filter and two on the injector pump,get the engine turned till you have the feel the feed pump lever has pressure,prime till the first filter is air free then close the bleeder,do the second,bottom one on the pump and finish on the top one,keep on priming till the lever goes limp,loosen each injector pipe a couple of turns,with the stop in the run position and the throttle on full spin the engine over on the starter till there is fuel spurting from each union,tighten the pipes and try a start,watch the exhaust to see if its injecting fuel,if not it is possible that the metering valve is stuck in the stop position,this can happen if the engine is stopped and the stop been left pulled out,it is best to stop the engine and push the stop back and put the throttle on full when parking for a long peroid,thoes pumps are a SOB to bleed,you need a fully charged battery,good luck.
AJ
Please log in or create an account to join the conversation.
Wed, Aug 31, 2011 4:24 PM
ronm
Offline
Send a private message to ronm
Posts: 1,143
Thank you received: 0
Reply to AJ.:
Careful,Cat own Perkins,I do not think that pressureizing the fuel system would be advisable,the CAV rotary pump is fuel lubricated meaning that the body of the pump is full of fuel and depends on a seal on the input shaft to keep it out of the engine,pressureize it and you may blow the seal out,start by making sure there is a unrestricted flow of fuel leaving the tank,take the top off the feed pump and clean the gauze and pump body,fit new filter/s,open all the bleed screws,one on each filter and two on the injector pump,get the engine turned till you have the feel the feed pump lever has pressure,prime till the first filter is air free then close the bleeder,do the second,bottom one on the pump and finish on the top one,keep on priming till the lever goes limp,loosen each injector pipe a couple of turns,with the stop in the run position and the throttle on full spin the engine over on the starter till there is fuel spurting from each union,tighten the pipes and try a start,watch the exhaust to see if its injecting fuel,if not it is possible that the metering valve is stuck in the stop position,this can happen if the engine is stopped and the stop been left pulled out,it is best to stop the engine and push the stop back and put the throttle on full when parking for a long peroid,thoes pumps are a SOB to bleed,you need a fully charged battery,good luck.
AJ
CAV pumps are the hardest bleeding SOB's ever built-If a Perkins owner ever runs out of fuel, he will not do it twice... AJ has pretty well covered the procedure, just keep at it & eventually the damn thing will decide to run...
My old boss told a customer who called after having run his Massey out of fuel, "You have to bleed it". the guy replied, "I've bled everything but the damned SEAT!!!" 😆
Please log in or create an account to join the conversation.
Wed, Aug 31, 2011 8:57 PM
Arborigine
Topic Author
Offline
Send a private message to Arborigine
Posts: 81
Thank you received: 0
Reply to ronm:
CAV pumps are the hardest bleeding SOB's ever built-If a Perkins owner ever runs out of fuel, he will not do it twice... AJ has pretty well covered the procedure, just keep at it & eventually the damn thing will decide to run...
My old boss told a customer who called after having run his Massey out of fuel, "You have to bleed it". the guy replied, "I've bled everything but the damned SEAT!!!" 😆


Thats probably why i got it cheap. Story was Gramps lent it out, got it back not running and passed on before he got it to run. Borrower probably ran it out of fuel. Its a pain to do under the fuel tank and between the loader arms so i have a 1 gal can I made with fittings that i will use giving me a lot more room to see whats going on and swing wrenches. I have a fire extinguisher with firrings to pressurise liquids but will only try that as a last resort.
Please log in or create an account to join the conversation.
Thu, Sep 1, 2011 7:30 AM
edb
Offline
Member
Send a private message to edb
Posts: 4,027
Thank you received: 0
Reply to ronm:
CAV pumps are the hardest bleeding SOB's ever built-If a Perkins owner ever runs out of fuel, he will not do it twice... AJ has pretty well covered the procedure, just keep at it & eventually the damn thing will decide to run...
My old boss told a customer who called after having run his Massey out of fuel, "You have to bleed it". the guy replied, "I've bled everything but the damned SEAT!!!" 😆
Hi Team,
on top of the CAV type injection pump you should find the fuel return line going back to the tank.
This line is usually connected to the pump by a banjo bolt type fitting, or a fitting that the return tube nut and flared tube screws into.
The bolt body can have either a relief valve that is made of glass--it is clear--and therefore looks to be straight thru, or an orifice in the side of it that is very hard to see. It is not unknown for the orifice to block up in time.
If it is blocked then it is almost impossible to bleed the pump body. The orifice, from memory, is only about 0.020" dia. and explains why it takes forever to bleed a full system of air.
Also agree AJ has given good advise.
Hope this helps.
Cheers,
Eddie B.
Please log in or create an account to join the conversation.
Thu, Sep 1, 2011 7:30 AM
Showing 1 to 6 of 6 results
YouTube Video Placeholder

Follow Us on Social Media

Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.

Upcoming Events

Veerkamp Open House 2025

Chapter Fifteen

| Placerville, CA

Stradsett Park Vintage Rally

Chapter Two

| Stradsett, Nr Downham Market. Norfolk PE33 9HA UK

Chapter 2 The Link Club's AGM

Chapter Two

| Faulkner Farm, West Drove, Wisbech, Cambridgeshire, PE14 7DP, UK
View Calendar
ACMOC

Antique Caterpillar
Machinery Owners Club

1115 Madison St NE # 1117
Salem, OR 97301

[email protected]

Terms & Privacy
Website developed by AdCo

Testimonials

"I also joined a year ago. had been on here a couple of times as a non-member and found the info very helpful so I got a one year subscription (not very expensive at all) to try it out. I really like all the resources on here so I just got a three year. I think its a very small price for what you can get out of this site."
-Jason N

Join Today!