john deere 70 points

My john deere model 70 needs the points replaced. i have a new point already, but ive got no idea how to install it.

can you guys help me out?
 
I have never changed the points in a 70 but it should be as easy as pulling the distributor cap, rotor and dust cover if it has one then disconnect the wires from the old points undo the hold down screws pull the old points out then reverse what you have just done to install the new points. Not sure the gap but likely to be in the 0.025 gap area since that is the most common gap for points
 
"[b:654c4848f0][i:654c4848f0]<font color="#6699ff">My john deere model 70 needs the points replaced.[/i:654c4848f0][/b:654c4848f0]</font>"

Take a look at the [b:654c4848f0]DISTRIBUTOR[/b:654c4848f0] diagram below.

a266726.jpg" width="650"


Note the cam (Key 4), contact points (Key 14), contact support to breaker plate screw (Key 15), cover gasket (Key 16), rotor (Key 19), and distributor cap (Key 20).

Reviewed the [b:654c4848f0]OPERATOR'S MANUAL OM-R2035R JOHN DEERE TRACTOR MODEL 70 SERIES[/b:654c4848f0] under the [b:654c4848f0]IGNITION SYSTEM[/b:654c4848f0] section under the [b:654c4848f0]DISTRIBUTOR[/b:654c4848f0] on pages 87.

?[i:654c4848f0]Remove distributor cap.

Wipe out the cap thoroughly with a clean rag, making sure ventilator holes are open.

Inspect cap carefully: if cracks are found, replace cap with a new one.

Remove distributor arm from the shaft by pulling straight out.

a266728.jpg" width="650"


Wipe arm and cam clean.

If breaker points are worn, pitted, or dirty, carefully remove both points.

a266745.jpg" width="650"


After cleaning, dress each point to a smooth, flat surface, using a fine hone.

(If points are badly pitted or worn, they should be replaced.)

It is not necessary to remove pits.

Just be sure points are clean and flat.

After points have been installed, add a trace of high temperature wheel bearing grease to cam.

Turn flywheel until cam opens points to widest position.

Adjust points to .022-inch.

a266746.jpg" width="650"


Examine the breaker for free movement.

Replace the distributor arm and cap.

Make sure the gasket is in place and in good condition.

Replace cables.

Upper terminal goes to spark plug on flywheel side and lower terminal to spark plug on pulley side.[/i:654c4848f0]?

a266763.jpg" width="650"


Hope this helps.
 
Unless it's a LP it's easier to remove the distributor entirely to work on it. I recommend putting the engine on TDC compression stroke for #1 cylinder just to know for sure where it's at. The drive lugs will be horizontal in that position. Mark the position of the base of the distributor in relation to the flange it bolts to with White Out or some other easily seen mark. While it's off, remove the plug on the top of the short shaft housing and be sure the housing is 1/2 filled with 20 or 30 W oil. The operator manual sez the gap is .022. If you have it off and on a bench, it's easier to get everything in tidy and find anything that may decide to leave the area. You can do all the "setting" on the bench and only have the wire from the coil to hook up when it's back on the tractor. Putting it back exactly with the marks previously made should be good to go, but the timing may need checking to be sure it's "dead on". Or as close as any old JD is going to get. Good luck! (Don't forget to replace condenser too.)
 
James, when it comes to good informative picture explanations YOURE THE MAN !!!!!!!!!!!! I know most of this but your pictures are soooooooooo much easier to follow. I'm glad you're here

John T
 
James is that grease zerk on the distributor factory? Either way I kinda like the idea of using grease instead of oil in the distributor.
 
"[b:654c4848f0][i:654c4848f0]<font color="#6699ff">James is that grease zerk on the distributor factory?[/i:654c4848f0][/b:654c4848f0]</font>"

No.

The OEM part for the Model 70 is a pipe plug [b:654c4848f0]R 11085 R[/b:654c4848f0] as shown below.

a266818.jpg" width="650"


The grease zerk was installed by a previous owner.

a266819.jpg" width="650"


 
Thanks for the compliment.

Many years ago, I developed and taught distance learning/e-learning/online computer courses.

The same method is used for presenting information here on the YT forums.

Just my way of ?[i:654c4848f0]paying it forward[/i:654c4848f0]? for all the help I have received over the years.
 

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