DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
12. If the output at minimum pressure was less than
the specificat ion for Gear Pump Flow to Loader
(Machine in Neutral) refer to Hydraulic pump -
General specification (A.10.A.20 - D.40.A.10),the
problem can be a restriction between the reservoir
and the gear pump, or the problem can be a badly
worn or damaged gear pump.
13. If the output at minimum pressure was more than
the specification refer to Hydraulic pump - General
specification (A.10.A.20 - D.40.A.10), there are no
problems between the re servoir and the gea r pump.
However, the gear pump can be worn or damaged
and still have good flow at minimum pressure.
14. Loss of output at 152 bar (2200 psi) indicates that
the gear pu
mp is worn or damaged. To determine
the efficiency of the gear pump, divide the flow
indication from test number 4 by the flo w indication
from test n
umber 1. This ans wer m ult iplied by 1 00
is the percent efficiency of the gear pump. If the
efficiency of the gear pump is less than 75%, repair
or replac
e the gear pump. If the efficiency of the
gear pump is more than 75%, the pump is good.
1 04/05/2005
A.10.A / 31
To Next Page
Loading...
