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Put on some new General Grabber OA Wide Base 385/65R22.5 tires on 22.5 x 12.25 4.75" offset 5 hand-hole rims on the steers.
And finally installed my M939A2-series outboard brake drum upgrade.
See post #113 https://www.steelsoldiers.com/threads/m809-series-m818-air-brake-retrofit.140055/page-6
And to top it off...
Fresh new General Grabber OA Wide Base 385/65R22.5 tires on steel 22.5 X 12.25 4.75" offset five hand-hole stud-piloted rims.
The rims had to be custom ordered. 5 hand-hole in this type are basically "unobtainium".
Here we go with an update! I finally tackled my front outboard brake drum job. Fair warning: I did not go cheap on this one though. I ended up using all M939A2 parts, including spindles, both spindle nuts and lock washer, inner and outer bearings, oil seal, hubs, wheel studs, brake spider...
My son and I are making an air tank setup for his Tacoma out of a 5-ton cargo truck splashguard. The splashguards, as heavy duty as they are, will act as support and protection.
It's going up under the bed where the spare tire used to be. We just need to design some hanger brackets for the frame.
The transfer pump is a smart move. I did the same mod.
I also replaced all my supply and return fuel lines from the left tank with AN fittings and braided nylon/stainless steel fuel hose.
Oh! No bueno!
As far as the rubber lines, I replaced mine with DOT push-to-connect brass fittings and 3/8" DOT nylon air brake tubing (SAE J844 Type B).
Possibly the poppet valve is leaking air into the transmission? That's the only air pressure supply plumbed anywhere near transmission. Disconnect and plug the air line to the valve and see if the leak stops.
I have a good used take-out shift lever from my old 6453. It includes the retainer but not the shift tower that bolts to the transmission cover. That's, unless you're planning to scrap the whole transmission. PM me if interested.
I had an out-of-state title. AAA verified my VIN. Easy-peasy! I filled out all prerequisite paperwork for Historic Plates. I took all the paperwork to a DMV proxy service that had a reputation for successfully registering and titling unusual vehicles. After verifying all my paperwork was in...
Yes. On the sprag (de-clutching) cylinder air pressure delivery is as follows...
-rear port = forward
-front port = reverse
The sprag cylinder will default to a neutral position if air pressure is completely removed from both forward and reverse sides. I used a Bendix TW-1 air control valve...
Thanks, Will! (y)
In those pics I had only dry fitted the bolts. I later tightened them down. I made sure to also spec out all the hardware I replaced on those mounts.
PTO Air Valve Plumbing:
Starting up the truck, I let the air build. I engaged the PTO valve to WIND and checked for smooth rotation. Opening the vent fitting above the bull gear on the winch, I could see the gear was rotating in the WIND direction. This verified the air plumbing from the valve...
PTO Shaft:
The span from u-joint centerline to u-joint center is 76 ¼”. An original one-piece drive shaft from the PTO to the winch input shaft will not work. The OEM transmission and PTO put that input shaft farther out toward the right frame. The new transmission is narrower at the bottom in...
PTO Operation (continued):
I installed the Winch Operation Plate just forward of the valve with 1/8" pop rivets.
I plumbed the air supply from the wet tank. The forward and reverse air lines were connected with slack. Once the winch drive shaft is hooked up, I can determine which line...
PTO Operation:
The new PTO was equipped with an air shift but can also be lever shifted. I chose to use air shift rather than have to reconfigure all the lever shift linkage.
A 4-way 3-position (neutral, forward, reverse) Air Valve was installed by custom cutting a hole in rear cab tunnel just...
It's not complete, but here's a good start.
https://www.steelsoldiers.com/threads/m818-gets-a-7-6-1-speed.210033/
I have to write up the forward cab tunnel modification for the new shift tower location, new shift lever, PTO, PTO control and PTO driveshaft.
PTO:
As mentioned before, the OEM forward/reverse PTO is not compatible with this transmission. There are two reasons; (1) the drive gear is different and (2) the mounting on the new transmission is deeper. I was actually ramped up to do a hydraulic set-up ala an M939-series truck. However, the...
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