Testing Exhaust Gas Color - Komatsu PC88MR-10 Shop Manual

Testing exhaust gas color

a Testing tools
Sym-
Part No.
bol
799-210-9002 Handy smoke checker
1
B
Commercially
2
available
Place the machine on a level ground and
lower the work equipment to the ground.
Be careful not to touch any hot part when
installing or removing the testing tools.
a Check this item under the following conditions.
Coolant temperature: 75 to 94°C
a If an air source and an electric power source are
not available in the field, use handy smoke
checker B1. When recording official data, use
smoke meter B2.
Testing
(PC88MR-A900-385-K-00-A)
1. Measuring by using handy smoke checker B1
1) Place a sheet of filter paper to smoke
checker B1.
2) Insert the exhaust gas intake pipe into
exhaust pipe (1).
3) Start the engine, accelerate it quickly and run
it at high idle, and operate the handle of
smoke checker B1 to absorb the exhaust gas
into the filter paper.
a Suction time: 1.4 ± 0.2 second
4) Remove the filter paper and compare it with
the attached scale for judgment.
5) After finishing the test, remove the testing
tools, and restore the machine.
2. Testing by using smoke meter B2
1) Insert probe [1] of smoke meter B2 into the
outlet of exhaust pipe (1), and fix it to the
exhaust pipe with clip.
PC88MR-10
(PC88MR-A900-360-K-01-A)
Part name
Smoke meter
30 Testing and adjusting
Engine and cooling system
2) Connect the probe hose, receptacle of the
accelerator switch and air hose to smoke
meter B2.
a The supplied air pressure must be 1.5
MPa {15 kg/cm 2 } or below.
3) Connect the power cable to an AC 100 V
receptacle.
a Before connecting the power cable, make
sure that the power switch of the smoke
meter is turned OFF.
4) Loosen the cap nut of the suction pump and
place the filter paper.
a Place the filter paper securely so that the
exhaust gas does not leak.
5) Turn ON the power switch of smoke meter
B2.
6) Start the engine, accelerate it quickly or run it
at high idle, and depress the accelerator
pedal of smoke meter B2 to collect exhaust
gas on 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 the test, remove the testing
tools, and restore the machine.
30-9