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You may have bad unloder orings in the compressor head depending on your compressor they can be easy or hard to change! If you have a 700 bendix its easy if you have a 500 bendix its dificult! take the small line off the air drier while the compressor is pumping between 90 and 130 if there is air coming out the line the problem is in the unloader !

FIRST which pump do you have robert bosch or ambac? If its ambc you likly need to replace the triger tab inside the pump! BUT you can try backing the screw out till it works correctly! loosen the jam nuts on the out side and back the screw out 2 or three turns rev the engine and let it off it the brake works but shuts down after half the rpm range then your half way there. turn the screw in 1/4 at a time till if at top rpm the brake dosent come on! Snap the throtle at the top rpms Quickly and hold it at top rpm if the brake trys to come on ,back the screw out sum more! If it dosent come on turn the screw in till it comes on!Ya hve to mess with it a bit to get it right if you cant acheave a desent set where the brake comes on then shuts off at aprox 1000 rpm you likly need to replace the triger tab!the Rob bosch pump is the exsact oposite!

yes your relay does ground to the injection pump that is the triger for the relay. and yes it is adjustable to a point!! What problems are you having? Is the engine brake sticking on?

I wouldn't tear into it till it becomes unbearable.but thats me!

Unless you have some sort of pre lube system your stuck!The system needs the oil preasure to operate correctly

Your best bet is to get some good used rockers and push tubes for a dynatard setup!The dynatard is built into the cam lobe and all the cams were the same .

In my opinion you'll easy do 7 or so with that ratio! and resonable driving habits! The 612 sounds like a single axle is it not?

Post the vin and the model maybe We can help some?

The E Tech engine has always had renaut cast into it every where the side of the block the valve covers its every where!

Count your self lucky! You have the last of the best! HOLD ON to it.The Cl with e7 is the easiest serviced truck on the planet! Volvo tends to complicate EVERYTHING they touch the trucks produced from here on will be as compicted as they can make em!Hate to say it BUT Simplicity of the mack line is gone.

if your runing a v8 the 417 387 ratio is a poor choice!The v8 will eat them for breafast if your pulling any weight! Middle of the road choice is 4.64! 5 02 change down requires a lot of gear changing and can get pricy!Good luck in your search thou used drop ins are your best bet.

I'm not arguing at all ,just simply stating what can and has happened!IT takes and hour to pull the pan! and find out for sure, guessing at it can cost money!A pan gasket is cheap peace of mind at least youll no where your heading!If the block is cavitated you can cheat (This Is A PATCH) by up rooting the liner clean the bottom of the bore and the liner and apply red loctight around the bottom 1/2 inch of the bore and slide the liner back in!The correct thing to do is bore and sleeve!Depends on what you want in the end!

You da man Rob! Agian good job !Idle should be set at 650 I hate it when they idle fast!

Remove the bolt 5/8 12 piont! clean out the hole a bit with brake clean Apply sealant to the washer and bolt head re install and torque to 90 foot pounds!

No kidding! Volvo land here we come!

Do check it out the line kit was just one of many fixes for poor response some were as deep as a diffrent oil pump and P 2 main bearings . Best to stick with external fixes this late in the game!You may have to pull the lids and have somone with a little experiance have a look see!

Slow to operate can be lots of things these jakes were plegued with oil preasure problems!There were update kits avalible new spings spool s check valves ect. another possibility being the plugs in the end of the rocker shafts can pop out!Does the engine have external lines runing to the jake spacers on the left hand side???

I would still pull the pan before the heads and preasurize! Also just because its a dri liner dosent stop cavitation the block it self can still cavitate And leak between the liner and the block seen it happen!

I know this is a bit late and an old post but ,I have to say that the Volvo engine does look to be a decent power plant Mack guy!THIS IS THE ONLY UPSIDE TO MY COMENTS. Having said that MackGuy ,I have worked, on , for and around Mack trucks for most of my working life 30 years OR SO ,as well as the volvo stuff fords kw PETES and the rest to some degree!The truck we sell now is a Volvo with a mack cab! DON'T KID US, THE volvo people have KEPT NONE, of the Good mack IDEAS ,NOT ONE! THE dog on the hood and the cab is all thats left.You take the cab off the frame its a volvo frame ,engine and abunch of jobber parts. SORRY its for the most part the truth I was once a proud mack guy now I work on Volvo stuff ,I have less kinder words for it but won't use it here!These Guys could have at least kept some of the simple Ideas and used them`NOT ONE did they keep! SO FAR ONLY THING I SEE that I MILDLY like is the engine IMPRESS me with some good old simple MACK stuff ont the rest of the truck ! Mack diffs mack trans mack built tough frames suspention yada yada! Sorry had to rant! l

The valve set marks are on the flywheel!Those marks you found ARE valve set marks!. Set in order of firing order if it has a jake set it at the same time!

Good job Bud! The hardest part is geting the both racks engaged into the yoke!If ya miss one side you can have a big oh shit on your hands! Beender dondhat.

The other option you have is A 99 % pto off the lower counter shaft !Check the rear case may have stamped pto on it if so the hole is there!Remove the lower counter shaft cover and if it has a hole in it Your in business!

The problem is the rad!You need 460 cooling if your going to up grade!For years they didn't offer the 460 in the MR Because Of this!

Proper Liner height for E7 Is 23 to 28 thou from the deck to the middle of the liner inside groove! Any horse power above 400 your asking for trouble at anything less than 25 thou!

Rob be sure to set the engine on the timing marks BEFORE you pull the pump!This can be done by removing the little rectangle cover in front of the fuel pump and look for a small hole in the pump drive hub! Centre the hole in the window!