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Putting a WD45 back together

A

Anonymous-0

Well-known Member
A good friend, who was a Allis collector, was in the process of restoring a '55 WD45, when he died suddenly. A couple of his friends are trying to put it back together. He had the motor done, but we had 4 boxes of parts to finsh putting back together. Got it mostly done, but have a couple of questions. 1, how do you time it? The manual we have dosn't explain how. 2, He started to covert it to 12 volt, and a couple questions there, It will go to neg. ground,do I reverse the wires on the amp. gauge, and on the coil, do you use a 12 volt wih a external resistor, or a 6 volt wih no resistor? And last, can you use the same light switch and just change bulbs? Thanks for any help.
 
Herald I'll reply to as many questions as I can to try and help you.

1. Yes amp gauge wires need switched if going from positive ground to negative ground. May have to install a bigger amp meter as well.

2. Wires on coil get switched and with 12volt coil a resistor is used. (If going to 12v system I would use 12v coil)

3. All the light bulbs will need to be changed.

4. The switch can stay.

5. I can't answer your question on the timing. If it were in front of me I could figure it out.

Hope all this helps.
 
On timing, you will have 2 choices. Either in the front of the crank, a mark, on the belt pulley, and a tab, with degree lines on it. Or on the back of the motor, the mark is on the side of the flywheel, and there will be a hole in the torque tube casting, like a D-14 or 17 has. I never owned a WD, or a WD-45, so I can't help much.
 
There should be a plate on the bottom of the tractor held on by two capscrews. When you remove it you will be able to see the flywheel. Have someone slowly rotate the engine until you see (may have to use a light) the TDC mark. I cant remember if the distributor turns at cranksfaft speed of half crankshaft speed on these engines, Anyway, remove the valve cover and confirm both rocker arms on number one cylinder are loose. If a valve is open rotate the engine 360 degrees.
Now install the distributor with the rotor pointing to number one cylinder. The distributor cap will either have a notch or lug indicating number 1 cylinder. Install the distributor and install the spark plug wires. The firing order is different on this engine than most 4 cylinder engines, if I remember correctly it is 1243, it is cast into the housing the distributor bolts to.
This should fix you up. If the engine backfires while trying to start something is wrong, retrace your steps.
 
Herald the easiest way to time the engine is pull the valve cover. Using a hand crank turn the engine over until both the valves are closed on the #1 cylinder.(make sure you are watching the valves all the time) This will be tdc for #1. Firing order is 1243. I used a 12v resistor before the coil as I didn't want to replace the original.(available at any auto parts store). Yes change all the light bulbs, they are available at any auto parts store.

Leonard
 
If the distributor wasn't removed pull No1 sparkplug near the radiator. Hold your thumb over the plug hole while a helper hand cranks the engine until you feel pressure. Once you feel pressure drop a long plastic straw on top of the piston. Then you watch the straw rise while the helper slowly keeps cranking. When the straw quits rising your No1 piston should be at TDC on the compression stroke. Remove the distributor cap and see where your rotor is pointing. If it's at your No1 plug wire your distributor should be in time. Your plug wires need to be in this firing order on your cap. Note which way the rotor turns.
1-2-4-3

Hal
 
Thanks for the help. That will help us get that much finished tommorrow. The man was a big AC collector. Big building "full" of AC things of all kinds. Be a big auction later on this year. Harold
 
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