Headlight installation on 4020

L.C.

Well-known Member
I'm updating the wiring to the lights on my 4020. I'm about to reinstall the lights but wanted to make sure I'm doing the right things to get a good ground path back to the tractor.

I'm going to wire brush the bolt on the back of the headlight. I've already used a sanding flapper wheel on the back of the big round washers. I've sanded the inside (front or dish) side of the small, oblong washer as well as the back side where the nut will make contact.


How much do I need to sand the recess in the fender where the headlight sits? Should I sand only the front, or also sand the back where the smaller washer will sit?


I also know to make sure the cast fender base and axle are clean and to give all the contact points just a touch of dielectric grease.

Any ideas?
 
(quoted from post at 15:34:25 04/29/19) I'm updating the wiring to the lights on my 4020. I'm about to reinstall the lights but wanted to make sure I'm doing the right things to get a good ground path back to the tractor.

I'm going to wire brush the bolt on the back of the headlight. I've already used a sanding flapper wheel on the back of the big round washers. I've sanded the inside (front or dish) side of the small, oblong washer as well as the back side where the nut will make contact.


How much do I need to sand the recess in the fender where the headlight sits? Should I sand only the front, or also sand the back where the smaller washer will sit?


I also know to make sure the cast fender base and axle are clean and to give all the contact points just a touch of dielectric grease.

Any ideas?

I just finished restoring my Dad's old 3020, I took everything apart and painted it then bought new light housings. I ended up having to run ground wires down to the batteries to get the lights to work as I had taken the fenders off and painted then, painted the axle housings while they were off so there was no good ground path with all the paint and no more rust. Lights all worked after I ran ground wires to the batteries.
 
I have done the two wire circuit for the lights as well
and that?s one way to make sure you have a good
ground
 
Hi, Di electric grease is an insulator, you might want to run a ground wire.

Dielectric grease, or tune-up grease, is a silicone-based grease that repels moisture and protects electrical connections against corrosion. ... The grease does not conduct electricity, so it shouldn't be applied directly to the mating surfaces (pins and sockets) of an electrical connection.Feb 26, 2015
What is Dielectric Grease? | Blain's Farm & Fleet Blog
https://www.farmandfleet.com/blog/what-is-dielectric-grease/
 

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