Hi Folks.

I have an issue with the steer clutch on my 977H.

Can't seem to find the parts I need.

Is there anybody that knows what units after the 977H that used a oil bath steer clutch?
As I found out almost all the D5,6 and 7, used a dry type.
I can't seem to find a crossover to a wet type.
As the drum for the 977 wet has been discontinued I was thinking of using the steels from the 7M5002/7B5294 with the 7B5190 plate.
But need to know if the wet discs will have enough bite with only 10 discs.
The difference in the 977 book is dry 2.62-2.88 and wet 3.06-3.88 with a wear limit of 2.47 dry and 2.90 wet, and springs about 50 lbs heavier!
If I can find a wet/dry drum/plate with similar configuration to my wet I will do it and interchange the dry/wet stuff to give me the thickness required.

What is the specs on the 5002/5294 and the 5190 pack thickness?
Will the 5294/5190 work wet with the springs/pins from the wet? and short a couple discs?
Anyone had this issue before?
Any help would be appreciated!

Thanks, Rob.

If you have major insight PM me for phone number as this will probably help!

The 53Axxxx went from dry to wet clutches at s/n 53A1907. The outer wet drum 8H2401 seems to be unique to the 977. The only source I could find is www.machinerytrader.com/parts/search?pag...archtype=starts-with

"Old wrote:

The 53Axxxx went from dry to wet clutches at s/n 53A1907. The outer wet drum 8H2401 seems to be unique to the 977. The only source I could find is www.machinerytrader.com/parts/search?pag...archtype=starts-with

This is of course the way my luck goes!! LOL
Has anyone tried to mix match the wet dry stuff together with any success?
According to the 977H manual that has both.
What I have found is the clutch pack is about 3/8" wider from the dry to the wet.
Basically the difference between 20 total dry and the 23ish wet.
Springs are heavier on the wet, (about 50lbs each). And the compressed dimensions of the springs are similar wet/dry!
So seems to be the pins are similar as the compressed length of the springs are very close!
And the wear limits are very similar, so drum travel within .07" from wet to dry!

Other than that would the 7b5190/7m5002(5294) with 10 or 11 wet discs and the heavier springs from mine have enough bite to drive this beast?
If we build a clutch pack max width with the dry steels and the wet discs? Anybody ever try it?

"Old wrote:

The 53Axxxx went from dry to wet clutches at s/n 53A1907. The outer wet drum 8H2401 seems to be unique to the 977. The only source I could find is www.machinerytrader.com/parts/search?pag...archtype=starts-with

Sorry OM. The drum i was talking about was the clutch drum not the brake drum. Mine is good and the inner splines are the same for a number of units!

Funny thing the wet clutch discs were used for a very long time in a bunch of different applications just not sure all of them! Maybe just answered my question!! LOL

The 5m1199 is the wet disc for the 977H!

These come up using the same disc!:977H, 977K, 977L, D5B, D6C, D6D

Now do any of these cross to the 2M2960 or 8M1145 input shaft?

Doesn't look like anything interchanges between wet and dry steering clutches. To go dry you need the 53A1-1706 steering clutch assemblies which interchanges with a bunch of early tractors. Pinion flanges are also different.

Ya would have to change just about everything!
The brake band and all the clutch assembly is different!
Clutch parts would be easier to find but would loose the longevity of the wet clutch.
Hector (Gemdozer) found me an original drum thank goodness!
Saved my ass from having to do a build/test video! LOL
Thanks OM for the info!

I really find it funny that more than just a handful of units had the wet steer clutches compared to the drys!
I was looking at the build numbers and this chassis had like a 150,000 units and we are lucky if 15,000 were wet!

Would be interesting to see if you could build a wet clutch using parts from both!
The newer drys had room for 24 discs which should cross over to the wet with the 5m1199 as a substitution for the 1A3987.
Maybe squeeze 13 5M1199's into it with the heavy springs from the wet clutch.
Would be neat to put it together on a table and see what comes out of it!
Maybe an upgrade in the future! LOL
Track someone down that has a large supply of used parts handy and get a look at it! But not today!

Hi Team,
a similar sized machine that came out in 1963 with wet S/C's and Brakes was the D6C.
From experience as a general rule of thumb, originally the track loaders were beefed up versions of an equivalent sized Track Type Tractors--basically a 977 was a d6 with bucket linkage etc, and D7 undercarriage.

BUT, the Numerical Parts Record would show any similar used parts for both machines, just as you indicate but without success.

At some time I recall that on some machines (D4--955 for sure) there was a change to the inner steer. clutch drums to go from multi toothed steels to ,I think 4 or 6 teeth splines where the drum splines were tapered to allow a gradual take up of load and so help reduce shock loadings to the drive train.

Just some random thoughts.
Cheers,
Eddie B.

"edb" wrote:

Hi Team,
a similar sized machine that came out in 1963 with wet S/C's and Brakes was the D6C.
From experience as a general rule of thumb, originally the track loaders were beefed up versions of an equivalent sized Track Type Tractors--basically a 977 was a d6 with bucket linkage etc, and D7 undercarriage.

BUT, the Numerical Parts Record would show any similar used parts for both machines, just as you indicate but without success.

At some time I recall that on some machines (D4--955 for sure) there was a change to the inner steer. clutch drums to go from multi toothed steels to ,I think 4 or 6 teeth splines where the drum splines were tapered to allow a gradual take up of load and so help reduce shock loadings to the drive train.

Just some random thoughts.
Cheers,
Eddie B.

You are correct Eddie for the 977 for sure.
Do you have a serial number break for the wet clutch in the D6C? I haven't found one.
Maybe the same design and parts that are in the 977!
The drum that I have is/has 8 lug steels that have a taper in the drum for them.
Guessing a gradual release and engagement to help with the release as well to break the oil film as well.
Problem is that drum 7M2928/9 has been discontinued and so far there is no aftermarket that I have found!
That is why I was trying to come up with a different fix with the newer splined dry drum and the wet discs!
But hopefully I have a used drum coming from eastern Canada that will solve my problem for now!

Maybe someone else can come up with a more permanent solution for someone else later!

Wet steering clutches came in at D6C 74A/76A.