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post #1 of 8 (permalink) Old 09-24-2011, 12:37 AM Thread Starter
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Noisy ADC

2011 550EPS Touring
I've never mucked about with the automatic descent control (ADC) however last night I switched it on just to see what it would do. What it did was was make a terrible clacking/grinding noise while trying to apply the brakes somehow.
I've got the shop manual so I read up on it but there isn't any trouble shooting info in there. Perhaps it's supposed to sound like jagged ball bearings however I suspect not.
It seems to be working as far as I can tell; comes on below 15 km/hr etc.
Any thoughts? I did a search for ADC & automatic descent control but didn't find any matches.I even tried misspelling the word descent without any luck.

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post #2 of 8 (permalink) Old 09-24-2011, 03:08 AM
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Morning!

The ADC is a known problem with contaminated fluid. You see, the clutch debris quickly contaminate the fluid. The fix is to fluch with fresh fluid, do some figure "8"s to circulate it. Then drain and repeat. This may take a couple times. There is not allot of fluid in there and you will need the proper fluid from the dealer. I sounds allot worse then whats usually going on inside.

The long term fix is to regularly change out the fluid before it gets too contaminated. Say every engine oil change.

Good luck,
CW

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Last edited by cwlongshot; 09-24-2011 at 03:10 AM.
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post #3 of 8 (permalink) Old 09-24-2011, 03:32 AM
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What CW said. Read a post every couple of weeks about this same problem and changing out the fluid almost always seems to do the trick.

Note to moderators, the search feature on this forum is lousy

I usually end up doing a google search of the site with much better results.

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post #4 of 8 (permalink) Old 09-24-2011, 05:21 AM Thread Starter
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Thanks Very Much

I'll try that and report back with the results. Won't be for a few days however as the dealership is only open till noon and I have errands to run in the other direction. Hope you fellows are right that it sounds far worse than it is because it sounds fairly terminal.

Cheers,

Klimbimm

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post #5 of 8 (permalink) Old 09-26-2011, 02:26 PM
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Quote:
Originally Posted by Klimbimm View Post
I'll try that and report back with the results. Hope you fellows are right that it sounds far worse than it is because it sounds fairly terminal.

Cheers,
Thought the same with my 500. I was sure a new front end was going to be going in. Two fluid changes and it is like new again.
Keep us posted with how it goes. Like said above, run it a bit between fluid changes.

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2015 Sportsman 570 Touring EPS, 26" Kenda Bearclaw HTR's on ITP Delta Steel wheels, Warn XT25, Iron Baltic HDPE Skid Plates (Mine)
2015 Sportsman 570 Touring EPS, 26" Kenda Bearclaw HTR's on ITP Delta Steel wheels, Warn Vantage 3000, Elka Stage 1 Shocks, Warn Mid-Mount Plow (Wife's)

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post #6 of 8 (permalink) Old 10-04-2011, 03:06 PM Thread Starter
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Tried Flushing

I flushed the ADC out this evening and drove the bike around the yard a bit and it improved substantially. I'll do another flush after this weekend

Cheers,

Klimbimm

2011 550 Sportsman Touring EPS
ATV Guru Cobra Front Brush Guard
Ricochet Everything Guards
Polaris Winch
Glacier 3 Plow System
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post #7 of 8 (permalink) Old 10-04-2011, 07:11 PM
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Good to hear. (or not hear) I bet one more time will do it for you.

2018 Polaris General 1000, Elka Stage 2 Shocks, 29" Tusk Warthogs, Polaris 4,500 lb. winch, Factory UTV Skid Plates, Dux Turn Signal/Horn Kit, EMP Cooter Brown Roof, Ryfab Folding Glass Windshield, Spring Brake Thingy
2015 Sportsman 570 Touring EPS, 26" Kenda Bearclaw HTR's on ITP Delta Steel wheels, Warn XT25, Iron Baltic HDPE Skid Plates (Mine)
2015 Sportsman 570 Touring EPS, 26" Kenda Bearclaw HTR's on ITP Delta Steel wheels, Warn Vantage 3000, Elka Stage 1 Shocks, Warn Mid-Mount Plow (Wife's)

2011 XP 850 EPS (SOLD 3,600 miles), 28" Kenda Bearclaw HTR's on STI HD2 Wheels, Warn XT25, Ricochet Ultimate protection, Elka Stage 1 shocks, QSC clutch kit
2009 Sportsman 500 EFI HO (SOLD 2,600 miles), 26" Maxxis Bighorns, ITP Delta Steel wheels, Polaris 2,500 lb. winch, Cycle Country plow (Wife's)
2007 Sportsman 800 X2 (SOLD 2,500 miles), 26" Maxxis Bighorns, ITP Delta Steel wheels, Polaris 2,500 lb. winch
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post #8 of 8 (permalink) Old 10-05-2011, 04:04 AM
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Quote:
Originally Posted by Klimbimm View Post
I flushed the ADC out this evening and drove the bike around the yard a bit and it improved substantially. I'll do another flush after this weekend

Cheers,
Good to hear!

CW

Mine

2015 RZR 900 Trail BLK. Pearl

Lock N Ride roof
Lock N Ride 1/2 windshield
Lock N Ride rear box
Rear Bars, Dash Bar & Rear extension bars.
LED lights front, top & rear
LOTS more coming...


2007 Polaris Sportsman 700 EFI SOLD


CALL Thor @ www.TheATVSuperStore.com - 815-321-3888

Check out my ATV videos and please subscribe!! https://www.youtube.com/user/cwlongshot

I PROUDLY SUPPORT OUR TROOPS!!
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