BGB Gear Oil - 1685092?

[MisterB 0]

I've looked through the manual several times and cannot seem to find any mention of what type gear oil goes into the BGB. They do list the Simplicity part number above, but not what type, weight, etc. Anyone know what a 'generic' equivalent is? How much oil does the BGB hold? Anyone ever use synthetic lubricants in this or the transmission? Tractor is 1978 7014S - 1690337 Thanks in advance! Ken

[RayS 80]

I use 80-90W. You can also use simplicity multipurpose powertrain oil.

[MPH 12]

I use synthetic gear lube in all my B series tractors. Think it's 80-90w

[UCD 14]

Tractor Discussions Commonly Asked Questions Transmission & Gearbox Lubrication Charts [url]http://www.simpletractors.com/club2/topic.asp?TOPIC_ID=22258[/url]

[MisterB 0]

So, the $64k question is: what exactly is Simplicity multi-purpose oil? I'm considering the change to synthetics and it would seem important to know what type of oil this is so I can find a suitable synthetic replacement. The transmission seems to be 90W gear lube. It's the BGB that I'm confused about...

[UCD 14]

It is simplicity's version of multipurpose transmission fluid, hydraulic fluid, gear lube. The earlier BGB's used 90w the later ones use multi purpose oil IE. ATF. ATF is just a high grade hydraulic fluid. Most of today's manual transmissions in cars and light trucks use ATF instead of 90w.

[Ketchamized 2]

Maynard, So it's safe to use ATF in the BGB and transmission in the B series tractors regardless of the model? If it's a higher grade, then the transmission would like ATF better?

[UCD 14]

That is not what I said. Where it says to use Simplicity multipurpose oil you can use ATF. The earlier BGB's used 90w the later ones used Multipurpose oil/ATF. The Transmission & Gearbox Lubrication Charts tell which ones. http://www.simpletractors.com/club2/topic.asp?TOPIC_ID=22258

[Ketchamized 2]

Maynard, Thanks, just wanted to double check before making a regrettable mistake. :) What would define "later" tractors? (Late 60's and on?)

[MisterB 0]

According to the chart, for my tractor...later would be 1975 and after.

[UCD 14]

The chart defines which ones by model number.

[Mick14 0]

How often should the gear oil be changed in an older tractor that takes the 80-90 oil ?

[UCD 14]

Some where around 100,000.00 miles. You will never wear it out. If it makes you feel better change it as often as you wish It is not expensive and doesn't take much or a lot of time to do.