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About DanielC

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    Senior Member
  • Birthday 09/01/1954

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  • Location
    West Linn,Or
  • Cars
    521's Ford Aerostar
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  1. DanielC

    521 part # thread

    There are two seal used in the rear axle of a 521. I am trying to use National Oil seal 1973, for the brake plate, or outer grease seal. The inner seal I am using is a National Oil Seal 223542 for the inner, or oil seal. This seal is in the axle housing.
  2. There is an adjustment between the choke plate and the fast idle linkage, usually by reducing or increasing the bend in the rod going down to the throttle linkage. This bend controls how much throttle is applied with a given choke plate closing. The idle mixture screw is only to set the idle mixture on a hot engine.
  3. I cannot count the number of times I have been approaching an intersection, turned on my headlights, and the other car suddenly stopped, because they did not see me before I turned the headlight on.
  4. On a 521 the coil in the horn relay is always hot. The relay ground wire goes to the turn signal switch, but is not connected to any turn signal wiring. There is a stationary ring, that a spring loaded contact connected to the steering wheel touches. Pushing the horn bar connects the spring loaded contact to ground. I think the grounding is in the steering wheel shaft itself, but I am not sure of that. My opinion, using the horn switch spring loaded contact for a steering wheel heater ground would be way too much current for the horn switch spring contact to handle on a continuous basis. The sliding contact would rapidly burn away, similar to using a too low resistance ignition coil with points,
  5. Only one backing plate so far, they are a "female dog" to get clean.
  6. It has been a while since I did any work on this truck, moving forward. Taking parts off the truck does not count as forward work, getting the truck closer to running. I usually do not like to take functioning parts off my other 521 trucks to keep one that I am driving running, but sometimes you have to. This is the space that the rear axle that was under Dragon Two was. This is the axle case that was under Ratsun, my 521 that I am more or less daily driving. The differential carrier blew up in September of 2019, but I already had a spare steel differential carrier from a junkyard 620. It would have been nice to put pull the axles from this axle case, swap the differential carrier, and put it back together under Ratsun, but the grease seals on this case were bad, and the brakes and drum were full of oil and grease. This is just some of the parts from the rear axle that was under Ratsun, the rear axle that blew up. Notice there is some paint filter funnels in the picture. Since the axle is apart, I decided to paint the brake plate before I put it back together. this is the inside of the brake plate. This is the outside of the brake plate. I cleaned the brake plate with solvent, then an abrasive Nylox brush, and finally a light sandblast. To keep sand, and later paint out of the bearing cavity, I cut these two pieces of plywood to cover the cavity on the brake plate. Tonight I put the axle case, with the 620 steel carrier under Dragon Two. It gets it out of the way in the garage, and keeps the parts for Dragon Two together. After sliding the axle case over the leaf spring, I supported the differential carrier with a floor jack. There is a hard to see bolt head that fits in a hole in the bottom of the bracket on the bottom of the axle case. This is the axle on that locator This is a bottom view, looking up. Notice the axle case is pretty much centered on the bolt through the leaf spring pack. These parts hold the rear axle to the spring leaf pack. The parts holding the axle to the spring pack. More will be added as I put the axles back into the brake plates, and put the axles back in the axle case.
  7. Since I put the axle from Dragon Two under Ratsun, I have gotten 20 bales of hay four different days, and been daily driving Ratsun. It had been running good. The emergency brake works a lot better, but that is expected because of the grease and gear lube that had worked its way into the brakes, and in the brake drum. Those brake drums were cleaned with solvent, then taken to a machine shop to get cleaned, and turned.
  8. Do not like your stock Hitachi Carb? I will take it.
  9. The stock 521 headlight relay has four connections. Power in, normally open contact, normally closed contact, and relay coil ground. Internally in the relay, the relay coil is connected to the power in connection. When the turn signal lever is moved forward, the relay coil is grounded. The power in terminal on the headlight relay gets power from the headlight switch. This is a thick red with yellow stripe wire. On 521 trucks, the power to the headlight switch comes in from the fuse box on a thick red wire. Earlier 521 trucks, with three always hot fuses, uses the red wire for both parking and headlights. Later 521 trucks have a four always hot fuse box, and the parking lights get their own power supply to the light switch from the fourth always hot fuse in the fuse box. When power is applied to the power in terminal, on the 521 headlight relay, from the light switch, if the relay coil is not grounded, power is then applied to the normally closed contacts. From the factory, the Red with a black stripe wire is connected to the normally closed contact, and this wire goes to the two low beam headlights. When the internally powered relay coil is grounded by moving the turn signal lever forward, the normally closed contacts are opened, and the normally open contacts are closed, switching power to that relay terminal. this terminal is connected to the red wire with a white stripe. This wire goes to the four high beam connection on the headlights. The headlights are grounded by a black wire that goes back to a black wire at the voltage regulator mounting bolt in the inner fender. Later I will add a easy modification that makes your headlights brighter, and removes headlight current out of the stock 50 year old 521 fuse box. Headlight relay modification: Almost anyone who has a 521 for any length of time has had a problem with the headlight fuse, and the fuse box. There must be a reason the 510 uses two headlight fuses. I did a "quick and dirty" easily reversible relay modification on this truck. Here is a picture of an extra in line fuse holder I added to the fuse box, The end of the orange wire hanging off in space will go to this extra blue relay, pin 30. The OEM relay above the the word "limited' on the battery is the original headlight relay. And here is another picture of the wires on the fuse block. The thick white wire comes from battery positive. This extra relay is hooked up as follows. Pin 30 gets power from the the added fuse. Pin 87 connects to the terminal on the stock headlight relay that had the red wire with the yellow stripe on it, with a short jumper. The red wire with the yellow stripe goes to pin 86 on the new relay A short wire to ground goes to pin 85 on the new relay. This additional relay takes headlight power out of the stock 521 fuse box. The headlight power also has to go through some connectors, the headlight switch, and into the cab, and back. This is the voltage drop in the headlight positive side before the relay was added. And this is the voltage drop after the additional relay.
  10. There are LED replacement lamps (bulbs) that you can get. superbrightleds.com is a source I used when replacing lamps in the instrument cluster on a 521.
  11. DanielC

    520 throttle cable

    620 throttle cables will not work. 520, and 521 trucks use imperial (inch) on the body, and fasteners. 620 trucks are all metric.
  12. So I used to tow a two horse trailer in the 1970's, with a 521. I live in Oregon, near Portland. I have been as far south as Central Point, near Medford, as far north as Vancouver BC, as far east as Joseph, and as far west as Seaside. Many trips were in the Columbia gorge. I am pretty sure I used WFO for longer than 12 seconds a few times towing the horse trailer. Yes, they were full sized horses you can ride. Average weight, 1,000 to 1,200 pounds. 454 to 545 kilograms to you metric folks. By the way, the Datsun was more reliable than full sized F-250 I also used to tow a horse trailer.
  13. Most of the cars and trucks we are driving are 30 to 50 years old. In that amount of time, there is most likely there is trash and junk in the gas tank. If you run the tank completely empty, that trash gets sucked into at least the fuel filter, and possibly beyond that. If you have a more modern vehicle, with the fuel pump in the gas tank, or an inline fuel pump close to the tank, the fuel pump need liquid gasoline flowing through it to cool the electric motor that drives the fuel pump. My dad had this advise. "Keep the top half of the tank full, and you never need worry about the bottom half." On my 521, the top half of the fuel gauge is not really accurate, but by a half tank, it reads pretty close. When the tank is close to empty, the gauge reads empty. When I first start the truck, the fuel gauge flairs a little high, and then reads a steady slightly lower amount. If the tank is almost actually empty, when I start the truck, the gauge does not flair slightly higher, I know I need to make getting gas a high priority.
  14. This is a continuation of an edited post I made above. I had a good match of the elbow tack welded to the short piece of 720 down pipe, and I just needed a piece of straight pipe to go from the elbow to the existing exhaust system. I cut a new piece of straight pipe to go between the elbow and the existing exhaust system. I am preparing to weld the straight pipe to the new flange. This is a tack weld joining the straight pipe, and the new elbow. Tack weld on flange, on one side Tack welds on flange the other side. With the downpipe tack welded, I removed it, and welded the flange, straight piece of pipe, the elbow, and the exhaust manifold connection together. Then grind the welds off, and put it back on the truck. Other side of the down pipe. With the downpipe in place, it looked a little too close to the speedometer cable. I took the transmission end of the speedometer cable off, cleaned the cable, and rerouted the cable outside of the steering column.
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