Baoli F Series, Руководство по эксплуатации и обслуживанию

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2.4 Hydraulic circuit (Fig 2.4)
After the engine is started, the charging pump inhales the oil from the oil tank. The
pressure oil from the pump serves two parts for hydraulic clutches and torque converter.
The oil necessary to operate the hydraulic clutches is divided into two circuits through
the pressure valve (set pressure of 1.1-1.4MPa): one circuit flowing to the torque
converter via. a relief valve (set pressure of 0.5-0.7MPa) and another to the inching valve
and the slide valve. The oil out of the torque converter is cooled by an oil radiator and
used to lubricate the hydraulic clutches and finally returns to the oil tank.
In the neutral, the circuit from the slide valve to the clutches is intermitted, and the
pressure valve is opened to let the oil only flow into the torque converter. When the slide
valve lies at its forward or backward position, the circuit form the slide valve to either the
forward clutch or the backward clutch is closed accordingly, thus causing corresponding
clutch come to work. When a clutch is at work, another must stop working, i.e. its spacers
and friction pieces must be disengaged each other and be lubricated and cooled. When
the inching valve is operated through stressing the inching pedal, apart or most of the oil
in the clutches flows into the oil tank through the inching valve rod. The oil circulation for
the torque converter then is the same as that in the neutral.
Fig 2.4 Hydraulic circuit
2.5 Towing disabled truck
The following should be done when the torque converter type truck to be repaired is
towed by other truck:
(1) Remove the half-shaft from the front wheel.
(2) Electron shift should be placed in the neutral.
1. Charging pump
2. Oil filter
3. Relief valve
4. Oil filter
5. Pressure valve
6. Oil radiator
7. Torque converter
8. Adjusting valve
9. Slide valve
10. Inching valve
11. Switch
12. Backward clutch
13. Forward clutch