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ENGINE TOP END
ENGINE TOP END
3-5-18
Automatic Compression Release
Automatic Compression Release
The Automatic Compression Release momentarily opens
the exhaust valves on the compression stroke at very low
speeds. This allows some of the compression pressure
to escape, making it easy to turn over the engine during
starting.
Due to the simplicity of the mechanism, no periodic
maintenance is needed. There are only two symptoms
of problems with the Automatic Compression Release
mechanism
【
A
】
: compression is not released during
starting, and compression is released during running.
(1) If compression is not released during starting, the
Weight Block are not returning to their rest position.
◆
Remove the camshaft (see Camshaft Removal).
◆
Remove the Automatic Compression Release unit.
◆
Visually inspect the spring.
If damaged, deformed, or missing, replace the spring.
◆
Remove the spring and move the Weight Block back
and forth.
If the Weight Block do not move smoothly, replace the
Automatic Compression Release unit. Also inspect the
exhaust camshaft for any damage, and replace the
exhaust camshaft if necessary.
【
B
】
Rest Position (compression is released)
【
C
】
Weight Block
【
D
】
Spring
【
E
】
Compression Release Pin
(2) If compression is released while the engine is running,
the Weight Block are not swinging out.
◆
Remove the spring and move the Weight Block back
and forth.
(3) If the Weight Block do not move easily from the
retracted position, replace the Automatic Compression
Release unit. Also inspect the exhaust camshaft for any
damage, and replace the exhaust camshaft if necessary.
【
B
】
Running Position (compression is not released)
【
C
】
Weight Block
【
D
】
Spring
【
E
】
Compression Release Pin
A
A
A
A
D
D
D
D
B
B
B
B
C
C
C
C
E
E
E
E
Camshaft Inspection
Содержание SNARLER ATV 2021 Series
Страница 1: ...SERVICE MANUAL ATV SERIES PRODUCTS 20210804 V01...
Страница 39: ...ENGINE LUBRICATION SYSTEM ENGINE LUBRICATION SYSTEM 3 1 2 Exploded view...
Страница 99: ...ENGINE COOLING SYSTEM ENGINE COOLING SYSTEM 3 4 2 Exploded view...
Страница 120: ...ENGINE TOP END ENGINE TOP END 3 5 10 Spark Plug Valve Cover Throttle Body Camshaft...
Страница 153: ...CVT SYSTEM CVT SYSTEM 3 6 2 L L G G G G R R Lh Lh R R R R Exploded view...
Страница 155: ...CVT SYSTEM CVT SYSTEM 3 6 4 R R R R G G R R L L Lh Lh M M G G G G G G...
Страница 185: ...4 13 FRONT AND REAR DIFFERENTIAL FRONT AND REAR DIFFERENTIAL...
Страница 212: ...COOLING SYSTEM 6 6 Special tools and sealants Silicone Sealant...
Страница 230: ...FRONT REAR SUSPENSION 9 2 Exploded view of Front suspension...
Страница 232: ...FRONT REAR SUSPENSION 9 4 Exploded view of Rear suspension...
Страница 246: ...WHEELS AND TIRES 10 2 Exploded view of Wheels and Tires R W R 1 2 5 6 5 6 7 R R R R R W 1 2 3 3 4 3 7 4...
Страница 249: ...WHEELS AND TIRES 10 5 Special Tools Jack...
Страница 264: ...BRAKE SYSTEM 11 5 Inside Circlip Pliers Special tool...
Страница 276: ...STEERING SYSTEM 12 2 Exploded View of Steering System 1 2 A A 3 4 5 5 5 6 3 B...
Страница 323: ...ELECTRICAL SYSTEM 14 15 EFI system Schematic diagram of EFI system...
Страница 383: ...ELECTRICAL SYSTEM 14 75 B10 B11 B12 B14 B15 B16...
Страница 386: ...ELECTRICAL SYSTEM 14 78 Wiring diagram...