A2 Rehabilitation

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dilvoy
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Re: A2 Rehabilitation

Post by dilvoy » Wed Apr 03, 2019 8:05 pm

I took the front cover off of the Red Dot A/C Evaporator unit to check out the fan and found that it is way too difficult to rotate so I removed it from the back side of the front cover. Came off easy enough and I found that this item is a commercial item that is commonly used on Busses and is easily available in 24v. I bought a new one for $100 and will swap the motor mount from one to the other, because mine has some wire connectors going into it. For information, the fan is made by SPAL in Italy.


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Re: A2 Rehabilitation

Post by dilvoy » Wed Apr 03, 2019 8:08 pm

Looks like I have another area to clean up! I think I'll be satisfied with vacuuming it out and getting any loose stuff out.


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Re: A2 Rehabilitation

Post by dilvoy » Tue Apr 09, 2019 10:45 pm

The new fan assy arrived. A corner of the plastic housing was broken off. Definitly was that way before shipping as the part was not loose in the box, but it the broken area is small and won't affect function at all. I swapped the motor mount over from the original fan, because it had some electrical connections built into it.


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Re: A2 Rehabilitation

Post by dilvoy » Tue Apr 09, 2019 10:47 pm

The fan assy attaches to the front cover of the Condenser very easily. One side wedges in with positive location by design and some foam to keep any rattling down.


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Re: A2 Rehabilitation

Post by dilvoy » Tue Apr 09, 2019 10:49 pm

Then a simple clamp on the other side. The bolts that hold the clamp down are what the nuts that hold the duct plenum in from the other side.


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Re: A2 Rehabilitation

Post by dilvoy » Tue Apr 09, 2019 10:55 pm

Now it's all back together and working fine. I don't think I will reinstall the flex ducts and vent grilles that head to the front of the vehicle for three reasons. They look very improvised, they are round flex duct that are held to the square openings in the plenum with hose clamps that look just wrong and maybe most importantly, I probably can't clean all of the dust and dirt from inside them. The fans blow plenty of air to circulate through the entire cabin so I think this is it for work on the A/C setup.


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Re: A2 Rehabilitation

Post by Retired War Horses » Wed Apr 10, 2019 2:14 pm

Ted Gates wrote:
Wed Apr 03, 2019 4:00 am
Stop calling Greg Shirley!

Really Greg? I guess I need one then form my rev.
2 in line at the fuel tank, one on the fuel filter inlet, I’ve seen these even on early model trucks...there are 3 PSI ratings.
All three are stupid expensive, like $60ea...they are as has been mentioned, anti flow back valves.
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Call us for all your HMMWV parts, service, upgrades and conversion needs.

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Re: A2 Rehabilitation

Post by 86humv » Wed Apr 10, 2019 7:49 pm

I have lots of new -3"s avialable
86 Hmmwv
Lots A parts
M101A2 trailer
M1102 trailer

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Re: A2 Rehabilitation

Post by dilvoy » Fri Apr 12, 2019 3:26 pm

The very loud Hydroboost sound got lowered to a "normal" level when I properly installed the grommet that seals the Speedo Cable to the foot well. The speedo cable enters wthin a couple of inches from the base of the Hydroboost so that took care of what I was complaining about. :oops:
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Re: A2 Rehabilitation

Post by dilvoy » Sat Apr 13, 2019 10:24 pm

I put another seventy five highway miles on the A2 today, enjoying the good working A/C and finally came to the conclusion that I needed to change the rear rotors due to brake vibration when braking at high speeds. Luckily I had bought some 12" vented rotors many years ago for dirt cheap, because no one had a Humvee that used them. LOL I figured I would have one some day so here is the day. When I pulled the right half shaft free of the rotor, I got a oily surprise. Gear oil had gotten past the Star seal on the stub shaft. I'm not going to just change that one, but will do all the seals in the rear diff and install new output flanges since I have those too. Fun project for this weekend. I'll do the same to the front end when time permits.


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Re: A2 Rehabilitation

Post by dilvoy » Sun Apr 14, 2019 1:06 pm

Changed the star and outer seals that seal to the Output Flanges. Went well. For information here are some photos of the parking brake piston compression tool that I used. I guess it could be done with a C Clamp and a Channel Lock Pliers, but this is so easy and not a knuckle buster at all. Leaves no marks on the brake caliper or piston either.


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Last edited by dilvoy on Sun Apr 14, 2019 1:13 pm, edited 1 time in total.
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Re: A2 Rehabilitation

Post by dilvoy » Sun Apr 14, 2019 1:07 pm

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Re: A2 Rehabilitation

Post by dilvoy » Sun Apr 14, 2019 1:08 pm

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Re: A2 Rehabilitation

Post by dilvoy » Sun Apr 14, 2019 1:12 pm

The rear piston of both left and right rear calipers with parking brakes need to be compressed back into the caliper while rotating clock wise. Both calipers need to have the pistons compressed and alternately rotated clockwise to be able to properly compress them for new brake pads. The large wrench does the compressing by rotating it counter clockwise and when resistance to compression is felt, the small wrench is rotated clockwise to rotate the parking brake part of the piston. When that tightens up, then go back to compressing the piston and alternate back to rotating it until piston is fully seated. Takes less than a minute to do.


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Re: A2 Rehabilitation

Post by dilvoy » Sun Apr 14, 2019 5:07 pm

I made one special tool for this job. I took a 20" long flat head screw driver and did some cutting on the end with a cutting disk on a hand grinder to allow me to pull out those diff seals. Super hard to get out and when they go they make a nice pop. luckily they are trapped over the shaft of the screw driver. Does anyone have a better tool?


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