SANY LATIN AMERICA
6-37
SY195/205/215/225C9 Crawler Hydraulic Excavator
Testing and Adjusting
Shop Manual - June 2013
6.16 Work Equipment Hydraulic Drift - Test
1. Boom and bucket cylinders
1) Park your machine in an attitude as
shown and stop the engine.
NOTE: Load the bucket fully with earth
or impose rated load on the bucket.
2) Operate the control levers so that the
boom is in the raising position and the
bucket in the digging position.
●
If the lowering speed rises, the prob-
lem lies in the cylinder seal. If nothing
changes, the problem lies in the control
valve.
●
Operate the control levers with engine
start switch in the ON position.
●
If the pressure in accumulator drops,
charge the accumulator again by run-
ning the engine for about 10 seconds.
2. Arm cylinder
ZX215-1004033
NOTE: If hydraulic drift exists in the work
equipment cylinder, check it according to the
following procedure and determine whether
the failure lies in the cylinder seal or in the
control valve.
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