SANY LATIN AMERICA
6-11
SY195/205/215/225C9 Crawler Hydraulic Excavator
Testing and Adjusting
Shop Manual - June 2013
6.4 Compression Pressure - Measure
Service Standard
Location
Service Item
Standard Value
Limits
Remedy
—
Compression
pressure
Each cylinder (at 200
rpm)
2550kPa {26kgf/cm²}
1960 kPa {20kgf/cm²}
Test
Differential pressure
between cylinders
—
Below 390 kPa {4kgf/cm²}
Test
Special Tool
Symbol
Tool Name and Shape
Part Number
Application
Compression
pressure gauge
connector
A
M14×1.5
A
MH061460
Measuring compression
pressure
1. Reduction of compression pressure can be
an indication for engine overhaul.
2. Check the compression pressure regularly
and pay attention to its variation from time
to time. In addition, in a new vehicle or
when new parts are installed for replace-
ment, the pressure may be higher due to
running-in of the piston ring, valve seat,
etc. The pressure will become normal as
the parts wear.
3. Before testing, make sure engine oil, start
motor and battery are in normal condition.
4. Set the machine as per the following:
1) Preheat the engine until engine coolant
temperature reaches 75~85°C.
2) Switch off all lamps and auxiliary de-
vices.
3) Place the gear lever in a neutral posi-
tion.
5. Remove the entire fuel injector.
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