149 Brake Adjustments

Baccarat · #1 12-29-2017, 06:47 PM

I'm in the process of checking the hydro adjustments. The service manual says to check the brake adjustments before adjusting the hydro. In the service manual for brake adjustments they give a minimum & maximum distance from a "pedal stop" bracket. My 149 doesn't have any pedal stop bracket and I see no indication that it ever had one.

If there isn't a stop bracket, where should the min/max measurement be from and if a min/max dimension should be measured from the foot plate, what should that dimension be?

Thanks
Mike

DeltaCub · #2 12-29-2017, 06:53 PM

Assuming your brake pads are in good shape this illustration on pg 32 of the Operator's manual may help.

http://ccmanuals.info/pdf/1x8-9%20Operator%20Manual.pdf

darkminion_17 · #3 12-29-2017, 06:58 PM

Which one of these are you missing?

R Bedell · #4 12-29-2017, 07:42 PM

Beth:

I am thinking page 29 works better.

DeltaCub · #5 12-29-2017, 08:41 PM

Quote:

Originally Posted by R Bedell

Beth:

I am thinking page 29 works better.

Roland...We are both correct! It is pg 29 as you have pointed out in the manual, but it is pg 32 via pdf format.

Baccarat · #6 12-30-2017, 12:21 PM

Delta & Roland: I has looked at both manuals. The page 29 illustration of the owner's manual is the same illustration that is shown in the GSS service manual. The pedal stop is the item that is not on the tractor and there is no indication that there ever was one.

Darkminion: I'm not missing either of those items. It appears that the gear drive tractors do not have a pedal stop as do the hydro tractors.

The tractor stops fine on level ground. It very slightly wants to roll when I want to stop on an incline such as loading it on a trailer. I looked at the brake discs and neither one shows any sign of "rubbing" as I would have assumed there would be. Both are rough in appearance and not shiney as would be expected. Being a hydro, brake usage is rather minimal to begin with. Either they are simply out of adjustment or the pads are in need of replacement. There looks to be quite a bit of adjustment left in the adjusting rods. It's just a matter of figuring out were to adjust them to.

A bit of background. At my shop I mounted a QA42A snowthrower. When I took the tractor home for winter duty, I loaded on the trailer with the trailer level and simply drove it up the loading ramp. At the first minor snow fall, I went out to test it and it wouldn't back up my sloped driveway. I figured that the hydro might need to be looked at. I reloaded it on the trailer without problems and took it back to the shop (nice and warm there). The hydro level was about a quart low so I went to a local IH/Case/New Holland/Cub Cadet dealer and picked up a couple of quarts of MTD fluid. I asked the dealer and he said it was either the hydro valves or the linkage needed adjusting. He told me how to check both valves to insure they were good and if so go through the linkage adjusting procedure. That is when I bumped into the brake setting requirement. To first test the brakes I put my trailer into full tilt and backed it on. No problem until I put the brakes on. That's when it would start to slowly roll off the trailer. I read the manuals and started to look at the tractor to adjust the brakes and found no pedal stop. The incline of my driveway is greater than the incline that I had the trailer at so I knew braking would be an issue at some point.

I'm going back to the shop on Monday when the shop is again nice & warm to see what I can figure out on the brakes. Any advice and/or suggestions until then would be appreciated.

Mike

darkminion_17 · #7 12-30-2017, 01:39 PM

There is no "pedal stop" so to speak, when you step on the brake pedal, the hydro linkage goes into the neutral position. The pin rests in the coat hanger shaped detent on the cam plate linkage when the brake lock is applied.

Baccarat · #8 12-30-2017, 02:12 PM

Quote:

Originally Posted by darkminion_17

There is no "pedal stop" so to speak, when you step on the brake pedal, the hydro linkage goes into the neutral position. The pin rests in the coat hanger shaped detent on the cam plate linkage when the brake lock is applied.

All of that works correctly. If there is no "pedal stop" where should the minimum/maximum dimensions that the service manual spec's out be taken from? The foot rest pad? Another option might be that the first brake lock notch is the maximum point and the second one the minimum point or vice/versa. Is that a possibility? The only other thing that I can think of would be to have the wheels withstand the 100 foot/pounds of torque, as specified, when the brake lock is applied. How do you measure the required torque setting?

Mike

jbrewer · #9 12-30-2017, 03:30 PM

Just a suggestion ....I think you might be over complicating this a bit.

The adjustment is a balance of engaging the brakes while moving the hydro into a neutral state. I doubt anyone in the history of man (other than the engineers doing the initial qualification at IH.) has measured the holding torque at the rear wheels, so don't worry about that.

As Lew suggested, just adjust linkage(s) so that when you step on the brake pedal somewhere around 3/4 of its travel

1) The tractor stops
2) The hydro is placed into neutral

The idea of the stop bracket is probably just to provide a convenient reference where both of these things happen at roughly the same time. If you really wanted that to happen after 1/2" of pedal travel, there's probably enough adjustment to make that happen too, but.... that'a probably not what you want.

You'll get 'er done.

John

Baccarat · #10 12-30-2017, 04:15 PM

Your probably right John. I can be a bit anal and engineers tend to be the same.

Everything works as it should on level ground. I'll go Lew's route and get the brakes set so that they hold on a 30 to 35 degree slope. I'll use the first brake notch and then the second one would compensate for brake pad wear. As long as the brakes fully release when the hydro is engaged, it should be good to go.

Thanks to all.
Mike