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http://www.steelsoldiers.com/showthread.php?137049-Red-Dot-R-9777-Install-on-M939A2

A2 were Cummins 8.3L (not 8.2L). 6CTA8.3 is the proper engine designation, as stated above, which is a turbocharged engine. All previous generations were Cummins NHC 250 which is a 14L engine and non-turbocharged. Difference in fuel economy is approx. 10mpg vs 4mpg respectfully, so the A2...

Sounds like loose belt, loose connections and/or a dropped phase in the alternator as stated above. Proper procedure from here would be the following: A. Insure all connections are clean and tight, do this not by simply looking at them. Loosen, clean, and reassemble firmly, all at battery and...

Not easily. The Chelsea distributor said this PTO (the 221 model anyway, which mine has a different number) can be flipped over so the engagement cover is pointing down. When doing this, it will raise the pump driveshaft about 1" he says. This driveshaft seems to sit very level right now, but...

So with that additional info, I would not recommend you repair your existing alternator (likely not the regulator in this particular case), or replace it with the same design which has a generally unacceptable failure rate. The cooling for these units is marginal at best, and when fully loaded...

Nope, 8.3 for the win. Turbo power!

Depends on what your priorities are. More output than stock? Better reliability than stock? Lowest replacement cost? Easiest direct drop in replacement? Want new/used/rebuilt? Lighter weight? All can not be obtained simultaneously. There are almost dozens to chose from, but before going...

Well, there goes my air engagement cover idea. Looks like there is only 1/2" of clearance between the existing cable actuated cover and the exhaust pipe on my 925A2. The model number on mine is also different than what GR posted above, just FYI. Still a Chelsea unit.

This was awesome! Just what I needed to call a local Chelsea distributor and check on an air shift conversion cover, of which they said is available for $139. Requires 2-3/4" of clearance from cover flange out, and includes a sender to light a lamp for when engaged. He said the factory cable...

Relay for sure. I upped the wattage of my bar from 300W to 420W by extending it, so that is going to be between 15-20 amps depending upon system voltage. Given that, I'll use a 30A relay, which is a standard cube relay, but make sure the coil side is 24V. Relays for rear defrost grids and...

I will. I have questions into Red Dot about roof cut-outs and sealing before I go tearing into the ceiling of my truck. Here is the civilian 6CTA8.3 bracket with accessories on it as mentioned above:

I purchased the proper Kenway/Red Dot kit to mount an ear style Sanden compressor onto the 8.3 engine with military accessory drive (A/C compressor mounts on driver side by power steering pump), but now I am switching gears and have purchased the civilian 8.3 A/C compressor and alternator...

Same specs as the eBay China one.

....as I sit here and wonder why my $100 Chinese one makes all these buzzing noises. Ha! Yours does look the same as mine before I cut them up to splice them together though. Test it on 24V before you install it or throw the box away.

Are you complimenting yourself, or the rear brake hose routing on my Cherokee? :tin hat:

Come on, feed that thing some Viagra and stretch her out to 70" !!! :driver:

More pics for those considering as I have received some questions and interest. This actual model is R-9777-1-24, which is a 24V cooling only model. You can get it in 12V also, with or without a heater core. I did not want the heat option, so this was a perfect score. Actual weight of this...

Book says 65lbs, but it is less. I'm going to toss it up on the roof and see what happens. If the roof needs support, I will likely seam seal a 1/4" plate of steel under the A/C unit to keep the roof from "oil-canning". May be able to use 2 pieces of low profile Unistrut on the inside to do...

There you have it wildchild467. If you really want the reach and hold 180F, then you'll have to switch to an on-demand fan.

I never said it wouldn't work. This winch's mounting plates are held to the frame with 14 bolts in its original application, none of which support its weight. Then, there are 8 large bolts which secure the winch to the plates. He is halving the fasteners again in half of that, and doing it as...