Operation & Maintenance Manual for 12M26 Series Gas Engine
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generator manufacturer or supplier (the distance from heat source: ≥400mm; or an effective
thermal baffle is mounted).
（
5
）
The wire shall be sized reasonably and connected correctly and securely. Each connection
terminal of generator should not be connected in a wrong way to avoid wires burnt-out or
generator electrical parts damage. Selecting a reasonable wire diameter should be based on the
premise that the complete output of generating capacity of generator be guaranteed, and it is also
the foundation for electricity safety for the complete machine.
（
6
）
The wiring of battery and generator must be disconnected before the generator is
disassembled or the complete machine is being welded. The disassembly and repair of generator
must be carried out by professionals. During installation, check whether each insulation pad and
sleeve is in good condition; any damaged or broken insulation pad and sleeve must be replaced!
The positive electrode side of generator and the generator shell shall not have a short circuit to
avoid serious accidents involving the complete machine.
（
7
）
After the engine is started, it shall reach a high speed from a low speed. Observe whether the
charging indicator is on when the speed is low, and off when the speed is high. If not, please find
out the reason immediately.
（
8
）
Observe whether the polarity of battery is “negative grounded”; if not, the generator and
regulator will be burnt out.
（
9
）
When the generator is in service, do not check whether the generator is generating
electric power by means of “testing sparks while grounded”; otherwise, the test lamp or
diode may be burnt out.
（
10
）
When connecting the rectifier to the stator winding, do not check the insulation condition
of generator using a mega-ohm meter or 220V AC power supply.
（
11
）
The generator must be reliably connected to the battery. The sudden disconnection will
generate a high voltage and damage the generator or voltage regulator.
（
12
）
When selecting a regulator matching the AC generator, the voltage class of AC generator
must be identical to that of regulator; the ground type of AC generator must be identical to that of
regulator; the power of regulator shall not be lower than that of generator.
（
13
）
The wire connection must be correct.
4.6.5 Operation and maintenance of oil pump
M26 engine oil pumps are of external gear type. Each gear pump uses two gears with identical
number of teeth to engage with each other and brings engine oil to the oil outlet from the low
pressure oil chamber via the reverse rotation of two gears and the clearance between them. The
constant rotation of gears keeps the engine oil volume in oil chamber increasing and the pressure
increasing, so as to guarantee the sufficient oil supply for each lubricating system of engine.
（
1
）
Oil pump equipped with pressure limiting valve. The role of pressure limiting valve is to
prevent excessive pressure in the oil pump and lubrication system to ensure the safe and reliable
Summary of Contents for 12M26 Series
Page 1: ...12M26 Series Gas Engine Operation Maintenance Manual ...
Page 6: ...Operation Maintenance Manual for 12M26 Series Gas Engine 5 ...
Page 18: ...Operation Maintenance Manual for 12M26 Series Gas Engine 9 1 Belt pulley 2 Gas inlet ...
Page 34: ...Operation Maintenance Manual for 12M26 Series Gas Engine 25 ...
