JPS6418729A - Hydraulic circuit structure of four-wheel drive type working vehicle - Google Patents
Hydraulic circuit structure of four-wheel drive type working vehicleInfo
- Publication number
- JPS6418729A JPS6418729A JP17641787A JP17641787A JPS6418729A JP S6418729 A JPS6418729 A JP S6418729A JP 17641787 A JP17641787 A JP 17641787A JP 17641787 A JP17641787 A JP 17641787A JP S6418729 A JPS6418729 A JP S6418729A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- drive type
- wheel drive
- control valve
- working vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To prevent wear, seizure or the like of a hydraulic clutch by disengaging the hydraulic clutch of a front wheel transmission system and thereby setting a 4 wheel drive type working vehicle in the 2 rear wheel driving state when a hydraulic working device is detected to be overloaded. CONSTITUTION:The hydraulic operating fluid from a pump 22 is supplied to the control valves 26 and 27 for the hydraulic cylinders 9 and 20 of a hydraulic working device 8 respectively through an oil supply path 25. The drainage path 29 from the control valve 27 is connected to the control valve 24 for the hydraulic clutches 18 and 19 of a front wheel speed reduction gear 10... In such constitution an oil supply path 25 is provided with the first relief valve 28 as an overload detecting device. Up stream of the control valve 24 the third relief valve 31 as an unloading device is arranged and connected to the first relief valve through a pilot oil path 37. When the working device 8 is overloaded, the relief valves 28 and 31 are opened to disengage the hydraulic clutches 18 and 19, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17641787A JPS6418729A (en) | 1987-07-15 | 1987-07-15 | Hydraulic circuit structure of four-wheel drive type working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17641787A JPS6418729A (en) | 1987-07-15 | 1987-07-15 | Hydraulic circuit structure of four-wheel drive type working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6418729A true JPS6418729A (en) | 1989-01-23 |
Family
ID=16013328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17641787A Pending JPS6418729A (en) | 1987-07-15 | 1987-07-15 | Hydraulic circuit structure of four-wheel drive type working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6418729A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031536A (en) * | 1989-05-29 | 1991-01-08 | Naoetsu Denshi Kogyo Kk | Method and device for halving signal wafer of semiconductor |
| JP2007299971A (en) * | 2006-05-01 | 2007-11-15 | Mitsubishi Electric Corp | Heating device of semiconductor wafer |
-
1987
- 1987-07-15 JP JP17641787A patent/JPS6418729A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH031536A (en) * | 1989-05-29 | 1991-01-08 | Naoetsu Denshi Kogyo Kk | Method and device for halving signal wafer of semiconductor |
| JP2007299971A (en) * | 2006-05-01 | 2007-11-15 | Mitsubishi Electric Corp | Heating device of semiconductor wafer |
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