Community Forums

T bogie · 03-26-2018, 09:59 PM

Help
Does anyone know who made the parking brake assembly on a 2002 40 FDDS ?
Tebogie
2002 40 FDDS

Old Scout · 03-27-2018, 06:57 AM

...think its a Haldex system on the 2002....might find the specific on Alpine coach website.. Curious, what parts need replacing and why?

T bogie · 03-27-2018, 12:17 PM

Brake shoes on mine are worn out

Old Scout · 03-27-2018, 04:04 PM

....if I could, you know the shoes are worn as a result of physical inspection...or is it just that the brakes don't hold anymore? The reason I ask is that parking brake shoes usually don't wear like service brakes, so worn out parking brake shoes are kind of rare?????? That is, except in the case where brake was left on and vehicle was driven extensively.

T bogie · 03-28-2018, 10:07 AM

It’s at Redlands RV and they said they are hunting for the parts they didn’t seem to know where to get them
So I thought I’d ask if anyone has replaced them
We love our Alpine but the parking brake is a weak link in its design and yes I have started driving with it on especially when it was out of adjustment

Old Scout · 03-28-2018, 10:34 AM

....Redlands has been good to us as an organization at Q-site-- personally, I have felt they probably do good work but were very proud of it [$$$$$$]. Pretty sure Haldex company name is printed on the yellow pull knob.....seems like they could have gone from there????
Haven't done a review of this topic on the forum, BIIRC, the primary issues is that the cable [between air chamber and shoes] idler pulley on some Alpine coaches was not installed in the correct position--resulting in spring not applying enough pressure to the shoe assembly. This type of braking mechanism uses air pressure to deactivate brake and spring tension to apply it.

greenmachine · 03-29-2018, 06:06 AM

Old Scout, Do they have the cable you speak of. My brake works, had it adjusted but one in ten times you apply the brake, failure. That's the only thing that's left to check. I guess it could have a bad spot. Just when you think its safe wow! I'll start looking into the cable replacement. We almost lost it twice and I don't take any chances. Thank you guys for the info.

Larry and Tammy
2003 38 FD Alpine

Old Scout · 03-29-2018, 07:29 AM

....my understanding was that the cable is not the issue per se. Owners report that cable is fully "adjusted" and is still too long [but is not likely it "stretched"]. Root cause is idler pulley was installed in wrong position so geometry between cable, shoes, and air can is wrong. Whether cable comes in different lengths is unknown. "Modifying" cable is a non-starter for a safety component--probably. Appears relocating pulley is the solution--but way out beyond my headlights on this one.

greenmachine · 03-30-2018, 05:49 AM

Old Scout, when weather breaks I'll take a real good look there, I wished the guy that fixed the pulley and changed it around took a pic of it. Before and after. I just don't trust it after my issues. If I'm not on a grade it doesn't excite me. My copilot doesn't like putting the chock there either.

Larry and Tammy
2003 38Fd Alpine
Boston Ky

Old Scout · 03-30-2018, 10:58 AM

....nothing says there isn't a parts/wear issue--could be worn shoes, could be a cable stretch issue [less likely], or a problem with the tension spring in the "air can" not expanding/retracting the all the way.....based on what I heard from another owner, I am betting on the pulley.....

FRED MASINO · 03-30-2018, 06:33 PM

On my coach, I think this is the part # for the spring brake that controls the emergence brake.
MAXIBRAKE® Spring Brake
Part no. MA15509

rampage42 · 04-01-2018, 04:56 PM

Quote:

Originally Posted by T bogie

It’s at Redlands RV and they said they are hunting for the parts they didn’t seem to know where to get them

So I thought I’d ask if anyone has replaced them

We love our Alpine but the parking brake is a weak link in its design and yes I have started driving with it on especially when it was out of adjustment

Colton truck repair replaced my parking brake shoes and brackets.

EngineerMike · 04-09-2018, 06:58 PM

I just have a couple notes on Parking brake Actuation FWIW in case they help- “For 2002 to 2006 the parking brake is made by Haldex-Midland and is called a Spring Brake (or Roto Chamber per Bendix). Full name is Haldex Maxibrake - Spring Brake, HR Series. The Haldex rebuild kit (service kit) is MQ15708 (price runs about $50, can order it thru www.ryderfleetproducts.com). There were none in stock at Haldex 2 months ago and I had to wait 6 weeks for the kit. The rebuild is easy but you have to be very careful as the spring in under 850 lbs of pressure so you have to use a press. The kit comes with new O-ring, piston bearing, rod bearing with felt wiper and synthetic grease.”

Per OldForester: “Spring brake/rotochamber had the following part numbers on it: HR2PT03A and 323A4K.” Another Alpiner rebuilt his: “Haldex, (OWABMAXI-H), roto-chamber/spring brake.” Haldex KSHR2PT03A00018 air valve (Dash valve?). Roto chamber rebuild kit is Haldex MQ15708 available w/search online, try Ryder Fleet Products, Fleet Pride, etc., cost ~$55 + shipping/tx in 2014. One Alpiner “Replaced The Rockwell strut assy A3787N14, replaced Rockwell camshaft 2710U151, Replaced emergency brake shoe kit PB2085-LS, rebuilt the rotochamber (actuator piston) and rebuilt/turned the drum/rotor. *Total bill 5/2012 $1587.” 1998 rigs & some 1999's use Bendix TW-11 valve in conjunction w/Bendix HR-1 hydraulic relay, and hydraulic pressure off the power steering/brake boost pump to operate the drum parking/emergency brake on the drive line; for pressure switch: NAPA part # 701-1606 fits. Can get later model coach rotochamber rebuilt, e.g. “Walker's Air Brake in Ontario, Ca. Ph. # 909-947-1141 rebuilt it in about 30 mins for $60.00, or purchase a rebuilt: Colton Truck Supply, in San Bernardino, CA located on I-215 just north of the interchange with I-10, cost was $125 plus tax, which is a heckuva lot cheaper than a new one at $488 plus shipping.; 909-888-8300; talk to Brandon.” Also: www.OttsFrictionSupply.com 201 N Columbia Blvd, Portland OR 97217, 503-283-4165, or Brake Systems Inc. in Portland. Dash valve (see photo below) is Haldex KN20021, a 4-port valve w/1 supply port, 1 exhaust & 2ea delivery ports; supply & 1 delivery have air lines while 2nd delivery port has 90 degree connector & Haldex 13241 air pressure switch, NC @ 0 pressure w/2 wires to operate the Park Brake light on dash (switch is sometimes called “low air pressure” switch & used on trucks to indicate air brake pressure less than ~66psi. Haldex dash valve (see in photo above) activates, via air tube, the “air quick release” valve or “air relay” valve located more or less above the U-joints; OEM part# Haldex N30108BC which appears to be superseded by N30108BK or Midland XXXXXXXX. Valve receives “signal” from the dash valve consisting of air-pressure (for park-brake-OFF) or no-air-pressure (for park-brake-ON); air-pressure closes the relay valve so supply air in connects to delivery air out to the park brake roto-chamber which compresses the heavy spring and releases the park brake. No-air-pressure opens the relay valve to atmosphere & closes the supply air in & dumps the delivery-air-out which takes pressure off park brake spring and spring applies park brake. This air-relay is common to all trucks & buses that have air brakes &/or air park brakes. Any relay valve that has 1ea ports for signal air, supply air & delivery air will work; the OEM valve part is common to many trucks & has 1 signal, & 2ea supply & delivery ports w/plugs in 1ea supply & delivery ports. OEM valve replacement can be found by searching “Haldex RG2 Relay Valve,” for which there are several part#’s. Price as of 2/2018 ranged from $20 to $80 online.