GB26JJ

Is there an easy way to get a hold of an owners manual, or the equivalent of one, for a truck this old?

I have a 2006 Mack CV713 tandem-axle dump truck with an "E7 427" engine and a 13-speed Eaton Fuller manual transmission (not sure of other exacts). I'm trying to locate a diagram or video with basic, user-level walk-around information. I'm not even sure where to check (or fill) the transmission fluid! Also, I know the PTO is leaking...is that hydraulic fluid? It's mounted directly to the side of the transmission. I'd like to be able to check whatever fluid that is that's dripping, and add as appropriate until I can get a legitimate fix. Finally, I have a small leak from the rear portion of the drive shaft (right before the front set of duals). Is this differential fluid back there? Again, where do I check said levels and add as appropriate?

I checked today, and all of the bolts were tight (as far as I could tell). When I pushed up on the drive shaft, there was a SMALL amount of movement -- just enough for me to be able to "knock" it.

I appreciate y’all. Where do I check this oil level (and add more if necessary)? No way for me to know how long it’s been leaking, although one of the things the “stealership” did in early July was replace some other U-joints. I’m assuming they would’ve checked the fluids then, too?

New to the forum…and new to big trucks in general! I recently bought a 2006 Mack CV713 and am running a solo dump business right now. I’ve noticed a leak where the drive shaft connects, just in front of the front tandem wheels (not really in the know as to the parts, sorry). My dealership has proven WAY less than helpful on other issues so far, so I’m trying to diagnose this issue on my own. Is this common? An “easy” fix? Thanks in advance for any help.