10 - 3
Operation
In the following descriptions the bold figures (e.g.
4
) relate to
the items on the sectional and exploded views on pages
14 - 1 to 14 - 3 and the component list on page 14 - 4.
Main Pumps (P1 and P2)
Each pump consists of a cylinder block
4
, containing nine
piston/shoe assemblies
6
. Driven by shaft
5
, the block
rotates between a variable angle, non-rotating swash plate
(
7
on P1,
8
on P2) and a fixed valve plate (
9
on P1,
10
on
P2).
Retainer plate
11
holds the piston shoes against the swash
plate. Due to the angle of the swash plate, as the cylinder
block rotates the pistons are forced to move back and forth
in their cylinders. The piston stroke, and therefore the pump
displacement, varies according to the swash plate angle,
which is controlled by machine demand.
The fixed valve plate
9
contains two crescent shaped ports
X
. The valve plate is located so that when a piston reaches
its nearest point to the plate it comes into line with the pump
inlet port
H
. During the next 180° of cylinder block rotation
the piston draws oil into the cylinder bore. When the piston
reaches its furthest point from the plate it ceases to be in
line with the inlet port and comes into line with pump outlet
port
J
. The next 180° of cylinder block rotation causes the
piston to force oil from the cylinder bore through the outlet
port.
The process is carried out sequentially by the nine pistons to
provide a continuous smooth pump output.
Section E
Hydraulics
9803/6410
Section E
10 - 3
Issue 1
Hydraulic Pump/Regulator
JS00060
Содержание JS130
Страница 39: ...3 3 Section 3 Routine Maintenance 9803 6410 Section 3 3 3 Issue 1 Greasing continued Excavator End...
Страница 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
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Страница 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Страница 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Страница 145: ...5 6 Section C Electrics 9803 6410 Section C 5 6 Issue 1 Pump Control Cushioned Boom Starting continued Flow Chart...
Страница 148: ...5 9 Section C Electrics 9803 6410 Section C 5 9 Issue 1 Pump Control Pressure Increasing System continued Flow Chart...
Страница 155: ...5 16 Section C Electrics 9803 6410 Section C 5 16 Issue 1 Pump Control Power Supply Cut Delay Flow Chart...
Страница 159: ...5 20 Section C Electrics 9803 6410 Section C 5 20 Issue 1 Pump Control Swing brake Swing lock continued Flow Chart...
Страница 160: ...5 21 Section C Electrics 9803 6410 Section C 5 21 Issue 1 Pump Control Lever Lock Circuit Diagram Time Chart...
Страница 161: ...5 22 Section C Electrics 9803 6410 Section C 5 22 Issue 1 Pump Control Lever Lock continued Flow Chart...
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Страница 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Страница 211: ...Section E Section E Hydraulics 9803 6410 Issue 2 3 5 3 5 Schematics Pilot Control Line Hose Connection Diagram JS03540...
Страница 212: ...Section E Section E Hydraulics 9803 6410 Issue 1 3 6 3 6 Schematics Pilot Control Line Hose Connection Diagram JS03540...
Страница 234: ...14 1 Section E Hydraulics 9803 6410 Section E 14 1 Issue 1 JS00010 Hydraulic Pump Regulator Dismantling and Assembly...
Страница 278: ...32 2 Hydraulic Circuit Diagram Section E Hydraulics 9803 6410 Section E 32 2 Issue 1 Control Valve JS01700...
Страница 279: ...33 1 Neutral Circuit Section E Hydraulics 9803 6410 Section E 33 1 Issue 1 Control Valve JS01610...
Страница 284: ...33 6 Boom Raise BM Operation Section E Hydraulics 9803 6410 Section E 33 6 Issue 1 Control Valve L...
Страница 287: ...33 9 Slew Operation SW Priority Circuit Section E Hydraulics 9803 6410 Section E 33 9 Issue 1 Control Valve JS01770...
Страница 293: ...Hydraulics 9803 6410 Issue 1 34 3 34 3 Section E Section E Control Valve JS01820 Dismantling and Assembly cont d...
Страница 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...