You might be surprised to learn that there are not one, but 2 PTO outlets on a C60L (or any other 4x4 CMP).
The common one is a standard 6 bolt SAE PTO on the side of the gearbox (LHS on a Chev, RHS on a Ford). This was typically not used to power shaft operated implements or hydraulics, but was used for a tyre pump. The gears in both the Chev and Ford 4 speed boxes are straight cut gears. PTO manufacturers like Chelsea make various shaft drive units (W/ or W/O speed reduction or overdrive) or hydraulic drive units, but the majority of the second hand ones you will come across are for the helical gears typically found in a Ford/Dodge NP435 or Chev SM420/465 gearboxes. You might be able to order replacement straight gears for them from Chelsea, but then again you might just be forced to order a brand new unit with straight gears complete. BTW, The Australian Army DID use a Servex-brand Hydraulic PTO unit on the C60S tippers, but you're not likely to stumble across one of those in a hurry.
These gearbox PTO units were usually only driven at around 800 engine rpm, not because of a speed limitation of the PTO or torque limit on the gears, but because of the design limits of the tyre pump. Excessive revs would increase the piston speed causing the pump to overheat and seize. The noise from the PTO is practically indistinguishable from the straight gearbox, so yes! Noisy!!
The other PTO fitted to CMP trucks was a larger unit to drive the winch, and was bolted on to the rear of the transfer case. These were only a dog clutch flange output to a universal jointed shaft to the chassis mounted winch. Although only a single speed, the output rpms could be varied by engine speed and gearbox gear selection. The PTO is capable of being operated at any rpm speed or gear, as it is lubricated by the T/Case gear oil (although naturally, winching was done at slower controlled speeds). As this unit is a flange output design, your hydraulic pump would need to be remotely mounted. Heck, if you were imaginative enough, you could fabricate a 3PL off the rear of the chassis and shaft-drive implements on the move. It's certainly been done before with farmer-ised Blitzes in the past!
