Komatsu PC88MR-10 Shop Manual page 120

10 Structure and function
Hydraulic tank
Pressure valve
(PC88MR-AD1C-041-K-00-A)
1. Filter element
2. Bottle plate
3. Gasket
4. Seam valve
5. Spring
Prevention of pressure rise in tank
While the hydraulic circuit is in operation, the pressure in the hydraulic tank increases as the oil level and
the temperature in the hydraulic tank rise corresponding to the operation of the hydraulic cylinders.
When the pressure in the tank exceeds the set pressure, bottom plate (2) is pushed up to release the
pressure in the tank and prevent pressure rise.
(Cracking pressure of pressure valve: 38.2 ± 14.7 kPa {0.39 ± 0.15 kg/cm
10-42
2 })
PC88MR-10