Subsequent installation of modified adjusting pin for air valve preload of stage II
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07.2-175 Subsequent installation of modified adjusting pin for air valve preload of stage II
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Testing and adjusting values
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National version
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Adjusting weight
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Length1)
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1976
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170 + 2
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190
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1976
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160 ±2
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180
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Federal 1973/74
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112 ± 2
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125
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California 1974
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143 + 2
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160
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Federal and California 1975/76
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170 ±2
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190
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M These dimensions apply to St 37. When using other materials, the specified testing weight must be maintained. The respective length results from this weight.
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Air valve gap
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When loaded with adjusting weight
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1.5 mm
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Conventional tools
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Hex. socket wrench 2.5 mm
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Drill 4.6 mm dia.
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Self-made tool
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Adjusting device for air valve of stage II
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07.2.2 la—175/1
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Subsequent installation
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1 Remove carburetor cover (07.2—192).
2 Unscrew locking screw (212), remove adjusting pin (76) and restoring spring of adjusting pin.
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3 Clamp carburetor cover into vise, using projective jaws.
4 Extend rear mounting bore of adjusting pin. For this purpose, drill completely through housing eye (1) with a drill of 4.6 mm dia.
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A Before B New
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Attention!
Do not damage carburetor housing wall (2) toward mixing chamber while drilling.
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5 Install new adjusting pin with knurls and restoring spring with slide block. For this purpose, move restoring spring into installation position. Slip-in adjusting pin up to stop while turning adjusting pin.so that the restoring spring can engage in slot of driver. Install carburetor cover.
6 Complete air valve adjustment of stage II (07.2-170).
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1 Housing eye
2 Carburetor housing wall 76 Adjusting pin
212 Locking screw
262 Restoring spring
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New adjusting pin with knurls (arrow)
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07.2.2 la-175/2
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