Checking tools for exhaust gas color
Stop the machine on a level ground and lower the work equipment to the ground.
Be careful not to touch any hot part when removing or installing the checking tools.
Check the exhaust gas color under the following condition.
| Engine coolant temperature: Within oper ating range |
If an air source and an electric power source are not available in the field, use handy smoke checker A1. When recording official data, use smoke meter A2.
Measuring with handy smoke checker A1.
1) Stick a sheet of filter paper to smoke checker A1.
2) Insert the exhaust gas intake pipe in exhaust pipe (1).
3) Start the engine and accelerate it suddenly or run it at high idle and operate the handle of smoke checker A1 so that the filter paper will absorb the exhaust gas.
Absorbing time: 1.4 ± 0.2 sec
4) Remove the filter paper and compare it with the attached scale.
5) After finishing checking, remove the measuring tools and return the removed parts.
Checking with smoke meter A2
1) Insert probe [1] of smoke meter A2 in the outlet of the exhaust pipe and fix it to the exhaust pipe with a clip.
2) Connect the probe hose, receptacle of the accelerator switch, and air hose to smoke meter A2.
Limit the supplied air pressure to 1.5 MPa {15 kg/cm2}.
3) Connect the power cable to an AC receptacle.
Before connecting the cable, check that the power switch of the smoke
meter is turned OFF.
4) Loosen the cap nut of the suction pump and fit the filter paper.
Fit the filter paper securely so that the exhaust gas will not leak.
5) Turn on the power switch of smoke meter A2.
6) Start the engine and accelerate it suddenly or run it at high idle and depress the accelerator pedal of smoke meter A2 and collect the exhaust gas into the filter
paper.
7) Place the contaminated filter paper on the clean filter paper (at least 10 sheets) in the filter paper holder and read the indicated value.
8) After finishing checking, remove the checking tools and return the removed
parts.
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