There is a timing plate on the side of the Roosa Master where you can access the rotating assembly. Rotate the plunger rotor around and you will see a 5/32nds hex bolt that holds down a flat spring. Turning that will adjust spring tension on the plunger assembly allowing for greater travel and therefore fueling. That is how you "turn up" a Roosa Master (Stanadyne DB2 and whatnot) pump. Probably not a secret a Tech Sgt wants his guys to know. Anything that came with those pumps runs best set at OEM settings. Fiddling with it just makes clouds of smoke and everything all-around worse. It's a utilitarian tractor pump for chugga-chugga diesel engines. It is very good at that. In fact the ASME has it listed as one of it's landmark inventions. Just let that beautiful baby be what she is.

This is just for the class purpose that we teach certain types. It doesn't cover all versions of it. Yes, majority of the pump's areas are lubed by oil, I agree. What we are talking about what being lubed by fuel are the pumps itself, not the whole housing/governor.

...go to Settings ⚙ select >Captions, then >Auto translate, and scroll up to locate >Arabic subtitles 🤔 Hope this helps. ✌🏼

Yes, your 7.3L diesel should have this exact same fuel injection pump (DB2). It really depends when you said it won't start. Have you narrowed it down to being the fuel delivery issue and not from other systems? What exactly is it doing? Cranking or no power period?

@@akaQ9 Thank you so much for asking the question. When I bought the truck about 18 months ago it ran strong as heck. I decided to go as far as I could in restoring the truck so very few miles had been put on the truck since then. What developed was It would always start fine and idol well. However, depending...I could drive it a mile or two and it would feel like it was running out of fuel and then crap out. After cranking it over and over it would come back to life, but God only knew it would continue to run. At that moment the fuel filter light would come on. I had just changed the filter so I knew there was nothing wrong with it. In changing it I noticed the filter was only half full but didn't know if that was normal or not (so little knowledge of these engines) I thought it might be the lift pump so replaced it. I know that always adds air to the system so lots of cranking is needed. After going through 2 new batteries charging them cranking charging cranking over and over must have fried them so have replaced them with the biggest best I could find. I had a conversation with a super nice channel youtube.com/@dieselcare he is a super nice guy and went to lengths to try and solve my problem. I had an ill spell but am back am track. So the question is after replacing the lift pump (probably didn't need to) and the fuel filter remains only half full there must be an air intrusion before the lift pump? I hope to God it's not the pickups in the tank. I think that means removing the bed? I hope not. Thanks, Rich

@@johnnyohness First thought is you got a coming in somewhere. It's tough to say and diagnose without looking at it in person. It looks like you already had someone look at it too, so alot of things have probably been eliminated out of the way during troubleshooting. You could test the injection pump. It could possibly be that you're having issues when the truck in under a load. Check the pressure on the injection pump by doing low and high pressure testing. If the pump pressures is not within the specs, your truck would crap out during load (accelerating, towing, going uphill, etc.). Sometimes this also don't occur until your engine is warmed up, so that mile or two that you mentioned could be that timeframe where you don't feel any issues, but then once warmed up, the injection pump and fuel system also warms up. Things don't come out until metals become hot. It's possible this is what's happening.

@@johnnyohnessyou have a fuel supply issue because air is getting somewhere in your system

@@AtomsForFuelI found that the fuel strainers in both tanks for the feed had deteriorated blocking the fuel feed to the engine. A 14.00 fix but had to remove the bed of the truck to access them

Negative. The piston types are normally called distributor types. There's many different versions of the distributor/piston types. Here's a video I made for those in the class. kzfaq.info/get/bejne/iq1kfc2hmuC-hKc.html

@@akaQ9 tq bro

Actually the delivery valve on these multiple plunger type or jerk pumps, specifically this brand, are shown here the correct way and it is exactly how it looks when you take those pumps apart. Once the plunger pressure exceeds 100psi it pushes the valve open upward. Now don't get me wrong, there are other similar type pumps on different brands that are the other way around and I think that is what you are referring to. They are mounted upwards with the spring at the bottom. We do have those at the schoolhouse and show them in-person. The fuel goes around the valve and pushes it down instead. However, this animation here shows the other brand with the valve this way. both designs work.

@@akaQ9 thank you for the information.

We are manufacturer specialized in auto and marine diesel engine parts since 1952. Our main parts are EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc. Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc. If you have any inquiries, pls do not hesitate to contact me.

@@hanruobing6924 i have a fuel pump servicing workshop in chittagong,bangladesh...I'll surely contact you if i need any of parts...thanks for your comment.

We are manufacturer specialized in auto and marine diesel engine parts since 1952. Our main parts are EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc. Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc. If you have any inquiries, pls do not hesitate to contact me.

There’s nothing strip club about that song… if you know what song it is.

Yeap. Very easy.

Lighten up. It's not so bad. I use it for teaching younger gen mechanics and majority don't complain. I tried it without background music, alot of 'em fallin' asleep.

"Look, I just flipped the switch" song lolol

I really enjoyed the music. Much much better than 90% of how to videos.

Hello, thank you. There are different types of governors that can go with this pump. The one that we teach in class is the hydro-mechanical servo type governor, which is classified as variable governors. It uses the centrifugal force and spring effect of the mechanical governor to move a spool valve in which the servo switches passages for pressurized engine oil to flow through and eventually moves the fuel rack you see here that will rotate the injection pump plungers to either more or less fuel position. When the engine load increases the governor moves the fuel rack to the more fuel position allowing the engine rpm to raise, and then vice versa when engine load decreases. I don't have a video for that but hopefully this explanation helps. I'll try to make one later on.

@@akaQ9 Excellent explanation. Which software do you use for such videos? Is it solid works? Thanks.

We are manufacturer specialized in auto and marine diesel engine parts since 1952. Our main parts are EURO II system: plunger, nozzle , delivery valves, head rotors, repair kits, etc. Common rail system: Injector complete and injector spare parts for CATERPILLAR, DENSO, DELPHI , BOSCH, SIMENS, CUMMINS, etc. If you have any inquiries, pls do not hesitate to contact me.

Lpll

@@akaQ9 . Lp Ploll