Nilfisk-Advance 21KB Service Manual page 51

Service Manual – PBU Propane Floor Burnisher
14. The idle speed throttle set screw must not push
on the plate beneath it. Loosen the jam nut that
secures the idle speed throttle set screw.
Adjust the idle speed throttle set screw so that it
does not make contact with the plate. Tighten the
jam nut to secure the idle speed throttle set screw
at this position.
15. Measure the exhaust Carbon Monoxide content.
An exhaust analyzer is required for this test
measurement.
Acceptable test measurement results:
PBU with Muffler version:
RPM Range (1600-1700)
Target CO = 0.14%
Max. CO = 0.2%
Target HC = 168 ppm
Max. HC = 500 ppm
NOx = Less than 80 ppm
If the test results are unacceptable, repeat
the procedure above, beginning at Step 2.
16. Place a small amount of 242 Loctite at
the edge of the opening over the regulator
adjustment screw. Using a wide punch
and hammer to compress the cap (found
taped to the side of the regulator) into the
opening.
Catalyst Muffler version:
RPM Range (1600-1700)
Target CO = 0.007%
Max. CO = 0.02%
Max. HC = 50 ppm
NOx = Less than 60 ppm
Figure 70 Cap Compressed Into Opening
Figure 68 Idle Speed Set Screw
Figure 69 Exhaust Analyzer
Engine System
Idle Speed
Throttle Set
Screw
Jam Nut
Plate
Cap
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