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Timberjack 660D log skidder,trans MODEL 137HR33624-5,SERIAL…

timberjack 660D log skidder,trans MODEL...
timberjack 660D log skidder,trans MODEL 137HR33624-5,SERIAL NO CUSAI8335I,UNABLE TO RELEASE HANDBRAKE,JUST RECONNED CHARGE PUMP AND HYDRAULIC PUMP but handbrake will not release
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Answered in 27 minutes by:
7/18/2016
Mechanic: Dan, Technician replied 6 years ago
Dan
Dan, Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 14,863
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment, trucks and farm equipment - 1995 WyoTech graduate.
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Hi John, My name is***** will be glad to try to help. The hand brake lever is stuck pulled up engaged? Could you please provide more details? Sounds like possibly the handbrake is engaged too tight under tension and the tension is what is causing the difficulty releasing the brake. Will the machine rock back and forth to help relieve some of the tension? if there were more leverage does it help? Let me know

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Customer reply replied 6 years ago
There are no cables on the handbrakes on 660d models, they are electric over hydraulic. The machine weighs 19.5 tonnes so pretty difficult to rock.
Mechanic: Dan, Technician replied 6 years ago

Hi John, I was going by your post refering to the hand brake. so you have the park brake switch which ties into the shift controller and disables the transmission until the park brake switch is released. The terminology hand brake threw me off. I worked for a Timberjack dealer and a Deere dealer I had no way of looking up your serial number information. I was thinking you had the older style with a hand brake lever next to the seat and I wasnt saying to rock the machine by pushing it. If it were the older cable style youd bypass the switch and shift forward/reverse with the service brake applied to help release any tension on the brake but for the cable style system. Anyway, since this is not a hand brake system and a park brake switch is the brake indicator going out when released? Check the switch and harness for power to the solenoid. If okay and the solenoid is working but the brake does not release, the seals can be bypassing internally.

Try manually releasing the brake ( its spring applied and pressure released) by teeing in with a porta power and gauge. Pump to 300 PSI- 350-PSI to release the brake. Let me know

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Customer reply replied 6 years ago
Thanks Dan, we'll give that a try. Will let you know
Mechanic: Dan, Technician replied 6 years ago

Pleasure to help

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Mechanic: Dan, Technician replied 6 years ago

Hi John, Did you get this resolved?

Dan
Dan, Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 14,863
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment, trucks and farm equipment - 1995 WyoTech graduate.
Verified
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Dan
Dan
Dan, Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 14,863
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Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment, trucks and farm equipment - 1995 WyoTech graduate.

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