A wide range of hydraulic pumps are available, the two most common types which are applicable to the Jacks described in the former chapter are as follows: HandOperated Pumps for Hydraulic Return Jack.
To be used as the hydraulic source for the hydraulic return jack of 720 kgf/cm2 series.
Has a high and low automatic controlvalve, the low pressure pump operates up to the loading of 30 kgf/cm2. This means larger output volume and higher speed without loss of capacity.
As the safetyvalve is recessed inside, operation is assured.
Applicable to hydraulic spring return jacks.