SANY LATIN AMERICA
IV
SY195/205/215/225C9 Crawler Hydraulic Excavator
Table of Contents
Shop Manual - June 2013
4.6.6.1 Operation of components .................................................................... 4-95
4.6.7 Valve control system .................................................................................. 4-107
4.6.8 Pilot valve.................................................................................................. 4-109
4.6.8.1 Work equipment and swing pilot valve .............................................. 4-109
4.6.8.2 Travel PPC valve ...............................................................................4-113
4.6.9 Solenoid valve.............................................................................................4-117
4.6.10 Accumulator ..............................................................................................4-118
4.6.11 Pilot oil
fi
lter ...............................................................................................4-119
4.6.12 Pump oil pressure sensor ........................................................................ 4-120
4.6.13 Hydraulic cylinder..................................................................................... 4-121
4.6.14 Work equipment ....................................................................................... 4-123
4.7 Air Conditioning System....................................................................................... 4-129
4.7.1 A/C components layout drawing ................................................................ 4-130
4.7.2 Control panel.............................................................................................. 4-131
4.7.3 Circuit diagram ........................................................................................... 4-132
4.7.4 Refrigeration principle ................................................................................ 4-134
4.7.4.1 Refrigeration cycle diagram .............................................................. 4-134
4.7.4.2 Heating cycle diagram ...................................................................... 4-134
4.7.5 Compressor ............................................................................................... 4-135
4.7.6 Clutch ......................................................................................................... 4-137
4.7.8 Condenser ................................................................................................. 4-138
4.7.7 Expansion valve ......................................................................................... 4-138
4.7.9 Evaporator ................................................................................................. 4-139
4.7.10 Receiver tank ........................................................................................... 4-139
4.7.11 Pressure switch ........................................................................................ 4-140
4.7.12 Fresh air sensor ....................................................................................... 4-141
4.7.13 Refrigerant ............................................................................................... 4-141
4.7.14 Compressor oil ......................................................................................... 4-160
4.8 Engine Control ..................................................................................................... 4-161
4.8.1 System operation ...................................................................................... 4-162
4.8.2 Components............................................................................................... 4-163
4.8.2.1 Fuel control dial ................................................................................. 4-163
4.8.2.2 Controller .......................................................................................... 4-165
4.9 Electrical Control System..................................................................................... 4-167
4.9.1 Control function .......................................................................................... 4-167
4.9.2 Machine control system diagram ............................................................... 4-168
4.9.3 Engine and pump composite control function ............................................ 4-170
4.9.4 Pump control function ................................................................................ 4-174
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