D Series Brakes

[.5racer 14]

Does any D owner have the split brakes ? I got a set for my 160 and I thought it was a complete set. What I'm missing is the cross tube and mounts to go from right to the left side of tractor . If I could get dims I could make them as original (spelling).The rod lengths and bends could be figured out after that.

Thanks

[.5racer 14]

no help

:wtf: :omg:

[JimD 3,345]

hi terry, i don't have a d series or the info you need, but surely someone here has the info or direction to a place to get it. i'm pretty sure thre are a lot of d owners in redsquare, but i guess sometimes it takes a while for the right one to see your post. if all else fails, i guess tou could just cuss the #&^#!)!!&^$ thing! hang in there and good luck, jim

[wh500special 2,253]

By chance, I happen to have one of these pieces laying on my workbench in the garage that goes to a complete kit I haven't installed since the hubs are impossible to remove. I assume this:

is what you're talking about.

If so, here's a few dimensions:

For the square plates that hold the thing to the tractor...

3"x3"x0.25" plate. Using the side that has the bolt holes as a reference, the center of the bolt holes are spaced 1/2" in from that edge (on 2" centers) and the large hole center for the pivot rod is spaced 2" from that same reference edge. The bolts are 5/16".

Spacing b/t these two square plates measures 10.75".

Spacing b/t the two plates mounted to the pivot rod is 13.50". For those plates, make them 1.5"x4"x0.25". Using the center of the 1" pivot rod as a reference, the 3/8" hole drilled thru the other end is centered in within the plate and is located 2.75" from the pivot rod (center to center). The edge of that plate falls 3.25" from the pivot rod.

The rod that connects all of this stuff is 1" OD. It is bushed in the two square plates with bronze bushings. I didn't measure them.

Two more pix:

I can get better measurements if you need them, but hopefully these are enough to get you going. I used an ultra precise wooden ruler for these measurements, so they aren't going to be precise enough to get you on the NASA approved supplier list, but they ought to be close enough.

I suppose I could send this assembly to you for you to copy and return. I am a little nervous about losing it in the mail, but odds are it will be OK...

let me know if you need additional info.

Steve

[.5racer 14]

Thanks Steve , that will work perfect from what I see ad read .I'll get this drawn up and get them made for install . I haven't looked yet but are the holes allready in the fram in yours ? Buy the way I'm getting ready to make replacement brake pads from auto set for mine . When I get them done , I'll see if you need a set .

Thanks Again !!!!! :banghead:

[.5racer 14]

What is the OAL ( over all lenght ) of the 1" shaft and the width of the bosses on the two swing arms . Other than that I think I have everything . Those bushing are shouder tpye standard for 1" but I'll need to ream after installation.

:banghead:

[wh500special 2,253]

The mounting holes should already be there.

The OAL on the 1" rod is 14.00 (13.5+2*(0.25)). When I get home again on Thursday I will try to get the boss dimensions...

I think the pads on my kit are in good shape (should be since it was NOS) but if I need any I will let you know.

If you're into the whole fabrication thing, you might want to make a couple complete kits to sell...certainly there would be several guys interested especially if you can keep the price reasonable (I'd say $200)...

Easy for me to say,

Steve

[Ian928 46]

Sorry for my ignorance, but are you talking about beeing able to brake either with left or right foot, or about beeing able to brake one wheel individually?

My D-200 seems to brake the axle going into the diff, this almost caused an

accident when my girlfriend lost one of the snowhains going down a steep hill and lost all brakes, the wheel without the snowchain just spun backwards while the wheel with the snowchain rolled free. Very dangerous!

By the way, the 1054 also seems to have this system.

[.5racer 14]

Yes in a way . There are two petals just like the full size tractors. Push both and bothe wheels stop. Push the right pedal and the right only stops. So forth for the left. Both pedals will be on the rigt side of the D. Great for tighter turns and when front want to slide straight with heavy load in the back.

The only brake I know of is the parking brake . I cold be wrong on this though, at this time my stops by hydroing to the oppsite direction.

[wh500special 2,253]

A few additional dimensions and a correction...

The "bosses" are 3/4" and are just sleeves that fit over the shaft and are welded to the end plates. They are pinned in place to the shaft with roll pins.

The OAL of the rod, and the overall distance from the outside surfaces of the two pivoting plates (attached to the rod) is 14".

The square mounting plates are free floating on the shaft (I thought they were fixed at that 10.75" spacing...but they are floating).

Now, to Ian's concerns...

The early D-auto's had no brakes. Instead the braking action was supplied by the "dynamic braking" of the hydrostatic transmission. Basically, moving the direction control lever (DCL) to the neutral postion provided braking action to the transaxle be restricting the fluid flowing within the transmission. If the fluid flow slows down or is blocked completely the hydrostatic motor cannot rotate and it slows the tractor.

In those cases where you want to hand push your tractor, a release valve can be opened (accessible with a screwdriver on the left side of the tractor below the battery) that allows fluid to circulate around the hydrostatic transmission. Slow speed pushing can then be done when this valve is opened a turn or two.

A separate "Parking Brake" was included to hold the tractor in position when parked. A lever on the dash (or in some cases a separate slot on the DCL lever itself) pivots a parking "pawl" inside the transaxle. This pawl meshes with one of the transaxle gears and keeps it from rotating. these pawls are frequently sheared off as a consequence of applying the parking brake while the tractor is still rolling. Not the best design from a durability/idiot proof standpoint, but when that pawl is locked in you cannot move the tractor.

On the later D's (i am guessing starting around 78/79 or so) the pawl type parking brake was eliminated. Replacing it was an external band type brake on the left side of the transaxle. In this case, pushing the brake pedal on the left of the tractor both moves the DCL toward neutral and tightens the band on the drum. When the parking brake is actuated, the band is supposed to be tightened pretty securely around that drum.

The downside to braking the transaxle instead of putting a brake on each rear wheel is exactly what your girlfriend experienced. But in 99% of cases it works quite well.

Optional on the D's (standard I think on some D200's) was the split brake kit .5racer is building. included in that kit was an individual disc brake that mounts to each rear wheel allowing them to be controlled independently. The "normal" transmission brake like on all the D's is still used to control the dynamic braking functions and help set the parking brake, but a separate set of pedals is mounted to the right side of the tractor that allow the wheels to be braked independently for turning assistance or transferring load for traction purposes.

The crossshaft pictured is the mechanism that transfers the motion of the pedal for the left wheel brake from its pedal (mounted on the right side of the tractor) to the left side of the tractor. A series of rods and linkages ties the whole system together.

I've never used these turning brakes so have no idea how well they work. As you know, these are not the most manueverable machines ever built so they are probably somewhat helpful when you need to do a U-turn and don't have a 40 acre field to turn around in.

Steve

[linen beige 14]

By the way, the 1054 also seems to have this system.

To which system are you refering? The turning brakes or the transmission/differential?

I've never seen a mention of any 1054 (or 953 or 1054A) having turning brakes. They are not listed as available accessories for these models. That doesn't mean that someone couldn't have rigged some up though (Note to self for future project.).

The 953/1054/1054A was a gear drive tractor that was not limited slip, so it does have the potential to loose tracton with only one wheel at a time. It does, however have a brake band on the left side. This band stops one of the internal shafts from turning and should stop the tractor. I have not encountered it (yet), my yard's pretty flat, but I guess that if one wheel lost traction on a slope the brake would stop it from turning and the non limited slip diff would let the other wheel keep turning. If this is so, it should hold true for all the non limited slip trannys that use the side brake band.

I guess maybe I could keep a boat anchor chained and at the ready. :USA:

[wh500special 2,253]

To which system are you refering? The turning brakes or the transmission/differential?

I think he means the external band type transaxle braking piece...not individual wheel brakes.