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once again thanks @Joey Mack you're a wiz!

Amen to that. Thank you for the post on this day of remembrance. These days it seems like things in our past are forgotten. A couple weeks ago,22nd of November, is another date that is beginning to be forgotten. The date that President John F. Kennedy was assassinated was hardly mentioned.

Same here!!! Although the cable pull was on the floor between the seats.. Same with the tanker pumps.

The sump pickup is the same. Unlike a car engine where a deep pan usually takes a longer pickup these engines use the same. It just has more volume to pull from.

Looks like a 350 turbo to me. S400 SO 41..

I say yes, because these Volvo GM Heavy Truck Corp. models including the WG had the White cab.

They went back to 24v?

@mrsmackpaul I read the form and it sounds like im kinda right about the 4v being the the first econodyne, but I always wondered if there was an overlap from the Maxidyne and the econdyne with the 4 valave head. like I told @85snowdog I will be in the shop tomorrow. I have to peal rubber off all 10 rims since I am switching to 11r24.5 tires ( not my most favorite job...😡😡) I will see if i can find any more tags on the engine.

wow this topic really blew up. Sorry for the delay! I haven't had a chance to get home in the last 2 days but I did zoom in on a picture I had on my phone and the compressor side of my turbo has a curve like your 300HP does. I do know that is more of application specific though. Depending on what application the engine was used for and how the charge pipes a route in that application, but I could be wrong. the turbine side of mine appears to be a little bigger then your 300HP so kinda tough to say. When I get home in the A.M. I will check out all the other tags and compare. really appreciate it @85snowdog.

So you have a flash to pass switch on top of the dash to the left. Sounds like a loose ground.

Yes that’s what’s weird about it that’s the switch I use to turn the lights on but they won’t turn off with that one if I don’t pull back on the switch on top left of dash

Hard to understand.. the other toggle switch next to the dimmer is the outer roof lights.

I have a 99 rd tri axle dump and I have this weird problem with lights so to start after I turn my lights off after it gets light out the 2 outside roof lights stay on unless I pull back on the thank you switch on the top left of the dash next is the weird one only when it gets cold out do the headlight magically turn on by themselves over night and sometimes if they don’t as soon as I start it in the morning they automatically come on and will not shut off even if I shut the truck off they won’t turn off for a good couple minutes but if it’s summer time or I park it in my warm garage they work fine I don’t even know where to start with that

I grew up on old dumps with 2 metal levers coming up through the floor, or a cable pull under the dash for the pto ,,, And never had a problem with them,, the air and some electric is nice and clean,,, but sooner or later it’s more prone to failure than the direct mechanical.

Thank you. I would have never thought cas would have one. That's crazy expensive. I Currently have a Bluetooth speaker linked to my phone.

Found this from some Googling about May or may not help Paul

National Pearl Harbor Remembrance Day is a solemn observance in the United States that honors and remembers the victims of the attack on Pearl Harbor, Hawaii, on December 7, 1941. The day serves as a reminder of the sacrifices made by military personnel and civilians during World War II and the importance of preserving and sharing the history of that pivotal moment in American history. Remembering the 2,403 Americans that died that December day 84 years ago.

As Bob said above. And the same method M-A-C-K letters attached to the front of the hood.

It seems better to have low beam in outside lights just by prcatical reasons. Lights are closer to the sides of a vehicle to play a marker role and light pattern on the road is wider.

That's what I needed for. And Google said "sh*t" as the straight answer. But deeper investigation brang more. Oh, better to get back to the Cruiseliner deal.

Hi Ken, Just a point. Swap of a bumper and visor are much less job than rearranging the rear axles. You could even put such big bright parts up for sale when still on a truck. Very good advertizement way when people see the look they'd get. The rig looks cool on the pic. Sure might be found in poorer condition when up close. Speaking convertion 613 to 612 I'd consider airride for that. Keeping the FR in place cutting off the RR with the rear frame portion. FR diff would need attention though since there's a power divider in it. Would need RR carrier to be swapped into.

I realize this won't help you because you don't have a stamped engine tag. But looking at the tags I posted for you , I noticed the 300 4 valve was an EM6-300L. I knew the M was for maxidyne, but didn't realize they would have still have them in 88. And the L at the end had me really confused . So I looked in my books and came up with this . I found it interesting so wanted to share.

I got some more pics to either help or confuse . Hopefully help These tags are on the 350 engine , Pump Turbo Looks like the model is S4A-008 and these tags are on the 300 pump Turbo Looks like it may say the model is S3A 009 I noticed the tag on the block of the 350 says initial injection timing is 20 and the tag on the pump said the same . And the tag for the 300 said 21 and that was on the 300 pump.

Dean, Thank You for updating my mind on how these new air controls work. It has been many years (40??) since I pulled a Dump trailer.