details for a 1977 b-100 tune up

[Joe 77 B100 84]

I know there are places to find these details but I hoped you experts would be able to help.

I wanna do a tuneup on my 1977 b100 8 speed.

Oil type?  Amount?

There is very little oil in the rear trans. What kind of oil do I use in it?

Anyone know what kinda carb I got and have a link to a video of a carb cleaning for it?  I've watched lots of they are all different. 

[Maxwell-8 4,367]

SAE30 in the engine

80w90 in the tranny

Just drop the bowl and blow trough the jets.

[Gregor 4,847]

https://www.kohler-engine-parts.opeengines.com/index.php?main_page=document_general_info&products_id=34596

 

Here is an owners manual and service manual for the engine. The  trans, I know nuttin'.  But I'm sure someone does

[ebinmaine 72,598]

Joe if I haven't already said so...

 to 

 

Rear differential/transmission oil is pretty much any type of inexpensive gear oil in the 80w range. 

Be sure to raise the front of the tractor as much as you can safely do so. There's a hump in the middle of the transmission floor. The drain is at the back on the bottom so the fluid will need to get there, over that hump.  

 

 

Here's a thread with a substantial list of things to check and or do:

 

 

Read down through that and it'll give you some ideas. 

You won't likely need to do most of it but it's a good reminder for the little things that get forgotten or pop up later. 

 

Here's a thread about carb cleaning:

 

Kohler carbs are very straightforward. 

 

 

[Retired Wrencher 5,773]

Joe    As you can see lots of help here. Do not be afraid to ask.

[rmaynard 16,293]

Drain what's left in the transmission. There is a 1/4" allen screw plug in the bottom near the hitch. Lift the front end to get the fluid that is in the front of the tranny. Refill with 2 quarts of 80/90W or similar gear oil. Engine uses non-detergent 30W oil. Replace spark plug gapped to .035. Replace points (.020) and condenser. Remove and clean carburetor. Install new float valve kit. Adjust according to the Kohler manual. Replace air filter.

 

This is what I would do. I currently own a B-100 and have owned 4 of them over the years. Best looking tractor Wheel Horse ever made. 

 

 

[953 nut 59,903]

The only other tidbit of information I would ad is to refresh the fuel system. Replace the rubber fuel line and add a fuel filter. Be sure to use ethanol-free gas, that 10% ethanol gas will cause you problems. You can use this site to help locate a station that sells it. https://www.pure-gas.org/

[Racinbob 11,923]

Sorry Bob but Kohler specifically states detergent oil. Below freezing multi grades but I now use straight 30 in all my K's

 

[Joe 77 B100 84]

While I am cleaning and replacing, should I get a new condenser, ignition coil and spark plug wire kit from isavetractors?  Or, do I figure out how to test them first and assure that they are "bad"?

Its new to me, hasn't run in 10 years and was SUPER dirty when I got it so I don't think it was well cared for.

Oh, and one more detail I found out at a party the other night:  the guy who gave it to me said it worked great when he got it and then, while using it one day, it just died while being used.  Engine died and wouldn't restart out of nowhere.  Hasn't started since then.

Maybe that gives you a clue as to what it is that is wrong.

[pfrederi 18,658]

Before you throw parts at it find out what is missing..Spark or fuel or compression...

 

pull the plug and crank the engine feel air coming out?? you have compression

 

lay the plug on the head and crank see any spark  (better yet spend 5 bucks and buy a Harbor freight spark plug tester.)  If you see spark put teh plug back in and spray a bit of carb cleaner into the carb does it pop /try to run?? 

[953 nut 59,903]

8 hours ago, ecojoe69 said:

while using it one day, it just died while being used.  Engine died and wouldn't restart out of nowhere.  Hasn't started since then.

That could be something as simple as a broken wire or bad electrical connection that needs to be repaired. Bad fuse, bad amp meter. who knows.  As @pfrederi said, do your home work before you buy a bunch of stuff you didn't need.

[Joe 77 B100 84]

11 hours ago, pfrederi said:

Before you throw parts at it find out what is missing..Spark or fuel or compression...

 

pull the plug and crank the engine feel air coming out?? you have compression

 

lay the plug on the head and crank see any spark  (better yet spend 5 bucks and buy a Harbor freight spark plug tester.)  If you see spark put teh plug back in and spray a bit of carb cleaner into the carb does it pop /try to run?? 

Ok.  I haven't tested for compression yet but that sounds easy enough to test.

The sparkplug is new so that SHOULD be good.

I will do the "spray carb cleaner in the plug hole" thing cause I saw that suggested in another youtube video.

Thanks for the suggestion.

[oliver2-44 10,708]

[mason_811 24]

I'll venture to say it never hurts to have a spare set of new ignition components, and if the price is reasonable even a carb kit. It's not as intimidating as it looks. Luckily service manuals are available for free and so is advice from the kind people here. There are a lot of good ways to still complete a job even if you don't have the factory tools that are impossible to find. Good luck on your project!!!