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11-01-2022, 05:50 AM
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#1
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Member
Join Date: Feb 2022
Posts: 33
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Hydraulic Park brake
I realize anything mechanical is subject to fail.
I wondering about the hydraulic park brake system on the workhorse chassis.
Is it reliable not to set the brake while traveling?
Pros and cons welcome!!
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11-01-2022, 07:07 AM
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#2
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Senior Member
Join Date: Apr 2004
Posts: 3,797
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Which Workhorse chassis are you talking about?. Workhorse continued to produce the Chevrolet P-30 with hydraulic Autopark for some years, their own W24 chassis has something similar but the W20 has a mechanically operated parking brake.
Quote:
Originally Posted by sarge1946
I realize anything mechanical is subject to fail.
I wondering about the hydraulic park brake system on the workhorse chassis.
Is it reliable not to set the brake while traveling?
Pros and cons welcome!!
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__________________
George Schweikle Lexington, KY
2005 Safari (Monaco)Trek 28RB2, Workhorse W20, 8.1, Allison 1000 5 spd, UltraPower engine & tranny, Track bars & sway bars, KONI FSD, FMCA 190830, Safari Int'l. chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2430, 1983 Winnebago Chieftain, 1976 Midas Mini
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11-01-2022, 07:16 AM
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#3
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Senior Member
Join Date: Jul 2005
Posts: 5,996
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Your transmission does not have a parking pawl within it. Your AAPB will release hydraulic pressure, thus setting the AAPB whenever the transmission is shifted into park, or when you pull out the yellow dash-mounted switch.
AAPB=Automatically Applied Park Brake.
If you have an ignition failure while going down the road, the AAPB will actuate, and you will find yourself suddenly coming to a long stop. If this occurs, it is advisable that you have your AAPB brake shoes inspected for wear. There is very little friction material even on brand new shoes.
__________________
TandW
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11-01-2022, 07:26 AM
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#4
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,397
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Quote:
Originally Posted by George Schweikle
Which Workhorse chassis are you talking about?. Workhorse continued to produce the Chevrolet P-30 with hydraulic Autopark for some years, their own W24 chassis has something similar but the W20 has a mechanically operated parking brake.
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My W24 has a mechanical park brake. Also a parking pawl in the transmission.
To Sarge 1946-
The hydraulic applied park brake can engage while moving, and many have. Google "Rotten Green Switch" and hopefully you will never have a problem. There have been many posts about it here.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand! 
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11-01-2022, 07:43 AM
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#5
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Senior Member
Join Date: Apr 2004
Posts: 3,797
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Ooops. My bad, I thought I had read that the W-24 had the J-71 autopark. That's what I get for relying on my memory 
Also, for those with the autopark hydraulic parking brake, Brazels sells upgraded switches
https://www.workhorseparts.com/96-00...Kit?filter=298
I installed these on a previous chassis and it was well worth the cost for resulting peace of mind
Quote:
Originally Posted by Unplanned Tourist
My W24 has a mechanical park brake. Also a parking pawl in the transmission.
To Sarge 1946-
The hydraulic applied park brake can engage while moving, and many have. Google "Rotten Green Switch" and hopefully you will never have a problem. There have been many posts about it here.
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__________________
George Schweikle Lexington, KY
2005 Safari (Monaco)Trek 28RB2, Workhorse W20, 8.1, Allison 1000 5 spd, UltraPower engine & tranny, Track bars & sway bars, KONI FSD, FMCA 190830, Safari Int'l. chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2430, 1983 Winnebago Chieftain, 1976 Midas Mini
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11-01-2022, 10:43 AM
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#6
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,397
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Quote:
Originally Posted by George Schweikle
Ooops. My bad, I thought I had read that the W-24 had the J-71 autopark. That's what I get for relying on my memory Not a problem. I can hardly remember what I had for supper last night.
Also, for those with the autopark hydraulic parking brake, Brazels sells upgraded switches
https://www.workhorseparts.com/96-00...Kit?filter=298
I installed these on a previous chassis and it was well worth the cost for resulting peace of mind |
Good info there. 
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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11-01-2022, 11:52 AM
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#7
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Senior Member
Join Date: Oct 2002
Location: Madison, MS
Posts: 10,527
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Quote:
Originally Posted by Unplanned Tourist
My W24 has a mechanical park brake. Also a parking pawl in the transmission.
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They early w-24 chassis do have an AAPB, but it is the improved version known as the J72 AAPB. The J72 was also used on the 2005 model year P32 series chassis, but hat was the last model year for the P32 chassis.
None of the W-22 series chassis ever had an AAPB, only the foot-applied PB.
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11-06-2022, 12:32 PM
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#8
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Senior Member
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 6,531
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Another vote for the upgraded switches from Brazel's Ultra RV Parts.
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
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11-13-2022, 09:41 AM
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#9
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Senior Member
National RV Owners Club
Join Date: Nov 2015
Location: Monrovia, IN
Posts: 544
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Quote:
Originally Posted by edgray
They early w-24 chassis do have an AAPB, but it is the improved version known as the J72 AAPB. The J72 was also used on the 2005 model year P32 series chassis, but hat was the last model year for the P32 chassis.
None of the W-22 series chassis ever had an AAPB, only the foot-applied PB.
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Last year the P32 chassis was built was 1999, the year Chevrolet sold the design to Workhorse. Everything after 1999 was a W22 of W24 chassis by Workhorse with a Chevy 8.1L engine.
__________________
1998 National Seabreeze 1330 Limited Chevrolet P37 chassis 7.4 Vortec 2014 Jeep JKU Sport Toad
Me, Beautiful DW, sometimes kids & grandkids
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11-13-2022, 09:51 AM
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#10
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Senior Member
Join Date: Oct 2014
Posts: 7,882
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Quote:
Originally Posted by m.elliott63
Everything after 1999 was a W22 of W24 chassis by Workhorse with a Chevy 8.1L engine.
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Incorrect.
Workhorse continued to make the P chassis and even modified the front suspension, widening the front track on later ones.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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11-13-2022, 01:50 PM
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#11
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Senior Member
Join Date: Oct 2002
Location: Madison, MS
Posts: 10,527
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Hydraulic Park brake
Quote:
Originally Posted by m.elliott63
Last year the P32 chassis was built was 1999, the year Chevrolet sold the design to Workhorse. Everything after 1999 was a W22 of W24 chassis by Workhorse with a Chevy 8.1L engine.
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The above is simply not correct. WCC continued making the P32 series chassis thru their model year 2005. WCC began using the 8.1L motor in 2001, and it was standard in their P and W series chassis as soon as it was available from GM.
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11-14-2022, 05:05 AM
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#12
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Senior Member
Join Date: Jul 2015
Location: Watertown NY USA
Posts: 6,531
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My coach is a 2002 built in November of 2001. Every chassis document I have with my coach including the original build sheet denotes my chassis as being a Workhorse P-32. Any parts listing I have found compatible with my chassis has been for a P-32 including listings from Brazel's Ultra RV Parts.
__________________
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
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11-15-2022, 05:05 AM
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#13
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Senior Member
Join Date: Nov 2018
Location: Fulda, MN
Posts: 1,254
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My 2000 Adventurer is on a P-32, chassis build date 01/00, coach build date 02/00 with a 7.4l.
__________________
2000 Winnebago Adventurer 32v, P32 Workhorse
2005 Winnebago Adventurer 38J W24 Workhorse 8.1l, 5 Speed Allison MH2000
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11-15-2022, 02:17 PM
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#14
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: Aug 2007
Location: Sonoma County, CA
Posts: 6,401
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Quote:
Originally Posted by sarge1946
I realize anything mechanical is subject to fail.
I wondering about the hydraulic park brake system on the workhorse chassis.
Is it reliable not to set the brake while traveling?
Pros and cons welcome!!
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You have a UFO Chassis with a totally different parking brake system.
__________________
Wayne & Roberta
08 Winnebago Destination 39W Gas UFO Workhorse Chassis......It's really weird being the same age as old people. I thought getting old would take much longer.
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