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The VIN listed above is a 2001 PRE-CCRS ETECH with the barb on the fuel regulator. So it looks like the 691GC225M is 44 PSI. The 691GC225M2 is 54 PSI. The 691GC225M4 is 80 PSI and the 63AM28 is 100 PSI. Fuelsystem.pdf

Yes, I lost a whole weeks worth of time to get it done and that is a lot of time!! I stopped at hydraulic store today(not Parker) and started on power steering lines. Had to order a fitting for auction side (5days Ugh). I had them make one line, I have to measure up for the other two lines. Getting close, but still so far to go.

Those old center loaded antenna were classic and fitting for an old truck. I wish I didn't have to deal with a short garage or I would be interested in them. I have a stubby Francis on the B because it clears the ceiling without bending.

@21guns I’m yet to get a response from you if you are still interested getting the harness. Thanks.

Yup lots of monkey motion there ! A feat of proper engineering ! R and D!😅 I highly doubt you will get hired on at Volvo! They don't allow testing and research! They save that for the public!

Dont think it has the fuel return barb!

Here is the bulletin, this only applies to the original ETECH engine and not the CCRS or ASET engines. The parts numbers have probably changed to Volvo part numbers however. ETECH Fuel supply MACK-SB-221-028.pdf

My understanding from previous posts is: he removed all the wiring before working on the cab, so telling by the ammeter will not work. Modern gen regulators are universal. Original regulators will work fine on reverse polarity but the point contact make up was optimized for one polarity to give the longest life. Not something a Hobby truck will ever even notice. Without the original to go on, it is unlikely to matter and negative ground is universal today. If he needed to change, it is as simple as re-polarizing the generator and swapping the battery cables. It is the generator, not the regulator that needs to be polarized, but that is easiest done at the regulator terminals. Regulator doesn't require any change to run "reversed". Some early Western Star and Autocar's use gauges that are positive ground only and can not be made to work (at least easily) on neg ground. Transistor radios will be harmed on reverse polarity. Alternators with one pole grounded to the case will be damaged if hooked up reverse.

The 100 psi fuel valve is part number 63AM28 and the 80 psi valve is 691GC225M4. The bulletin number is SB-221-028

Paul, That's how I am with those Hustler rabbit ears. Out dated, probably would work but such a part of my childhood that I just like to look at them & remember... My dad had one the he carried when he drove, had one on the deck lid of his car, I had a set on a couple pick up trucks & my black Mack and my grandpa had a set mounted in the rear quarters of his 1970 Chrysler Newport. Grandpa was a sideband guy way back.

Factory-authorized dealership since 1948 selling and servicing Mack, Volvo, and UD heavy-duty trucks. Address: 8059 US-22, New Alexandria, PA 15670 Phone: (724) 668-2201 Hours: Wednesday 6 AM–11 PM Thursday 6 AM–11 PM Friday 6 AM–11 PM Saturday 6 AM–12 PM Sunday Closed Monday 6 AM–11 PM Tuesday 6 AM–11 PM

The pictures are outstanding.The one of it new is a really great one to have.Looks to have been worked hard but well looked after.Keep us updated on how your getting on with it... Paul

Hell, you got one up on me I’ve never even heard of that model. Good luck to you bud. Sounds like they got a plug-in to the dashboard with a computer. You might wind up taking it to the dealer. I’m sure it’s a small fix.

Hey best wishes bud … have a ball… Bob

Best of luck bud …. I’ve had mine 32 years and I’m not sure how it’s wired but it has an alternator on it now no regulator… bob

Welcome aboard bud looks excellent … bob

There were 2 different fuel pressure relief valves for the standard 1998.5 to 2001.5 ETECH engine (Pre CCRS and ASET) these had the barb on them for the plastic push on fuel return line coming firm the cylinder head. I believe one was a 60 psi and the other was a 90 psi. Some of the 400 and 427 engines had a rough idle and Mack had us put in the 90 psi valve to smooth them up. Later some software updates and removing the center o-ring on the EUP’s solved the rough idle. Also the 90 psi valves caused the EUP o-rings to seep more fuel in the oil than they already do. By the time everything was figured out the CCRS engine was starting production and the problems were resolved. There is a service bulletin on this and I’ll see if I can find it. It was titled Fuel System Improvements or something like that.

Matt let,Tks for the help will try today.I’ll take that voltage regulator let me know what you want for it and I’ll send it to you,or if you use PayPal.Tks again,Mike

Thats good to know. Thank you very much

I guess you could send a P.M. to Barry. He is there parts manager

this is a Mack truck site. for questions about that car, you would be better off asking in a European car forum, as they are sold over there not here in the United States.

I've seen several VNL's over the years with the X15 in it, so I assume that it is still an option there. As for the VNH (Volvo's Granite), I don't think it's an option. They are probably going with that new X12 like the Mack trucks.

Happy Birthday Back in Black Pullin.. !! 🎂🥳

I purchased some turn signal and marker lights for my B43. Marker lights were all there but one of my turn signals is missing. I filled their contact forum multiple times but haven’t gotten an answer for a while now. My phone can’t make international calls so can’t call them. Any help getting in touch with watts truck center would be much appreciated.

I found 691GC227M2 on the web , states that it's 70psi..Could anyone confirm 👍? I would call any of my local mack dealers and ask ,but they're as useless as tits on a boar hog and lazier than an upper jaw. Thanks Red.