hayesfamily Report post Posted December 2, 2017 Friend of mine has a 07 Workhorse chassis (UFO) and he is having an issue with the brake cylinder on the drive shaft locking up. He will try to release the brake and ABS lights and Brake will flash and coach cant/wont move. I thought it was the relay in the box beside the transmission that went bad however the "guy" that has the coach in DE seems to think its ok. I am super skeptical because he said the manual required 1600psi to unlock the brake which I think is down right wrong but ... I am not a mechanic I just fix my stuff cause I cant afford to pay FORD. Anyone else aware of this issue and what was the solution. I am trying to help from a distance with out going to DE to have him tow the coach home and figure it out from there. Share this post Link to post Share on other sites
hermanmullins Report post Posted December 2, 2017 Keon, I don't remember the number but there was a recall on the workhorse brake calipers. Have your friend contact his coach manufacturer to follow up on the recall. Herman Share this post Link to post Share on other sites
abyrd Report post Posted December 2, 2017 I'm not familiar with Workhorse chassis, however I am familiar with the drive shaft parking brake on the Chev P30 chassis. The brake is actually engage with a charged spring and uses a hydraulic cylinder to compress the spring to release the parking. On these units there is a procedure to release the parking brake if the hydraulic system fails. Jim Share this post Link to post Share on other sites
dickandlois Report post Posted December 3, 2017 Keon, Attached are PDF copies with some information on the UFO Chassis Brakes. There are more files, but it is hard to know what matches what chassis. Rich. UFO_SAHR_Actuator_test_adjust_10_11_07.pdf UFO_Park_Brake_Function_HPB_1_23_07-1.pdf Wabco_HPB_High_Pressure_Brake_Brake_Bleed_Procedures_for_UFO_LF72_Chassis.pdf Share this post Link to post Share on other sites
hayesfamily Report post Posted December 8, 2017 The ABS Brake Pump was the culprit FIVE THOUSAND DOLLARS! Share this post Link to post Share on other sites
dickandlois Report post Posted December 9, 2017 Keon, Thanks for letting everyone know what went south. Kind of makes one appreciate the older and simpler systems. Rich. Share this post Link to post Share on other sites
hayesfamily Report post Posted December 9, 2017 This is not to say that Workhorse is a piece of junk or anything like that but I am so glad the majority of the people that I talked to told me to stay the heck away from them. Unfortunately this is not the only issue that he's had with this particular chassis that seems to be a global issue. On 12/2/2017 at 4:52 PM, Hermanmullins said: Keon, I don't remember the number but there was a recall on the workhorse brake calipers. Have your friend contact his coach manufacturer to follow up on the recall. Herman There was a recall and I'm not exactly sure if that recall issue was supposed to prevent or solve this from happening but unfortunately he wasn't eligible for whatever reason. Share this post Link to post Share on other sites
hermanmullins Report post Posted December 9, 2017 The recall was for sticking calipers and would be a safety recall and must be fixed regardless of warranty or age. Herman Share this post Link to post Share on other sites
