Doosan D30S-7 brake issue

  • Posted 9 Jun 2019 11:52 PM
Ohio, United States I'm working on a Doosan D30S-7 forklift. About a month ago it was having issues with the brakes applying while in use. Everytime I would show up it wouldn't happen. Finally I saw it. It started doing it all the time. Leave it set for awhile and go again. It has hydraulic assisted brakes. The brakes are wet type. When the issue would happen I could crack the blades and release the brakes. I finally came to the conclusion that hydraulic pressure on the assist side of the master cylinder was bypassing applying pressure to the brakes. I installed a new master cylinder and it worked perfect. I got a call yesterday saying the condition was back. I drove out and tested the unit for about 30 minutes with no symptoms. I'm sure they will get more frequent like before. I cant imagine the new master cylinder is bad, but it's possible. Is there something I'm missing. My contact at Doosan has never heard of this issue. Thanks for any help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Machinery-onQ Listings
Atlet UND140DTFVXE875
  • AtletUND140DTFVXE875
  • 2013 | Used - Sale
  • United Kingdom
BT HHM100
  • BTHHM100
  • 2014 | Used - Sale
  • Belgium
BT LWE160
  • BTLWE160
  • 2013 | Used - Sale
  • Belgium
BT LWE200
  • BTLWE200
  • 2015 | Used - Sale
  • Belgium
BT LWE160
  • BTLWE160
  • 2014 | Used - Sale
  • Belgium
Yamaha G29THE-DRIVE
  • YamahaG29THE-DRIVE
  • Used - Sale
  • United States
  • USD 3,475
Toyota 7FBR15
  • Toyota7FBR15
  • 2014 | Used - Sale
  • Japan
Jungheinrich EFGVAC20
  • JungheinrichEFGVAC20
  • 2010 | Used - Sale
  • United Kingdom
  • GBP 6,470
Unicarriers FHGE20T15
  • UnicarriersFHGE20T15
  • 2016 | Used - Sale
  • Japan
Nyk FBT20PN75-300
  • NykFBT20PN75-300
  • 2007 | Used - Sale
  • Japan
Featured Business
Tailift Material Handling Taiwan Co.,Ltd.
Focused simply for the new era
Machinery-onQ Listings
Unicarriers FHGE20T15
  • UnicarriersFHGE20T15
  • 2016 | Used - Sale
  • Japan
Yamaha G29THE-DRIVE
  • YamahaG29THE-DRIVE
  • Used - Sale
  • United States
  • USD 3,475
Toyota 7FBR15
  • Toyota7FBR15
  • 2014 | Used - Sale
  • Japan
Jungheinrich EFGVAC20
  • JungheinrichEFGVAC20
  • 2010 | Used - Sale
  • United Kingdom
  • GBP 6,470
BT LWE200
  • BTLWE200
  • 2015 | Used - Sale
  • Belgium
BT LWE160
  • BTLWE160
  • 2014 | Used - Sale
  • Belgium
Atlet UND140DTFVXE875
  • AtletUND140DTFVXE875
  • 2013 | Used - Sale
  • United Kingdom
BT LWE160
  • BTLWE160
  • 2013 | Used - Sale
  • Belgium
Nyk FBT20PN75-300
  • NykFBT20PN75-300
  • 2007 | Used - Sale
  • Japan
BT HHM100
  • BTHHM100
  • 2014 | Used - Sale
  • Belgium