18 - 7
Hydraulic Pump
Dismantling and Assembly
The working environment must be clean and the workbench
covered with a cloth or rubber sheet to prevent damage to
the components.
The illustration opposite shows both halves of the tandem
double axial piston pump, but the procedures refer mostly to
Pump 1. These procedures should also be applied to Pump
2 except where indicated otherwise.
Note 1: The components from one pump section must not
be mixed up with the corresponding components from the
other section and should be returned to the section from
which they came.
The item numbers called up in the following procedures
correspond with those in the exploded view.
Dismantling
Before dismantling, the pump ports should be plugged and
the external surfaces thoroughly cleaned to prevent the
ingress of dirt into the pump mechanism.
1 Remove drain plug 1 and let the oil drain into a suitable
receptacle.
2 As an aid to re-assembly, match mark the mating
flanges of regulator 4 and pump casing 5. Remove
socket head screws 2 and 3 (2 off each) and lift off the
regulator. Put the regulator to one side in readiness for
dismantling if required (see Regulator, Dismantling).
3 Remove the gear pump assembly 6.
Section E Hydraulics
9803/6410
Section E
18 - 7
Issue 1
Hydraulic Pump/Regulator JS130, JS160
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