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Kohler Command Pro CV980 User Manual

Page 25

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3.3

Section 3

Troubleshooting

3

Š”Žȱœž›ŽȱŠ••ȱ›ŠŒŽœȱ˜ȱ‘ŽȱŒ•ŽŠ—Ž›ȱŠ›Žȱ›Ž–˜ŸŽȱ‹Ž˜›Žȱ
the engine is reassembled and placed into operation.
ŸŽ—ȱœ–Š••ȱŠ–˜ž—œȱ˜ȱ‘ŽœŽȱŒ•ŽŠ—Ž›œȱŒŠ—ȱšž’Œ”•¢ȱ
‹›ŽŠ”ȱ˜ —ȱ‘Žȱ•ž‹›’ŒŠ’—ȱ™›˜™Ž›’Žœȱ˜ȱŽ—’—Žȱ˜’•ǯ

Basic Engine Tests

Crankcase Vacuum Test
ȱ™Š›’Š•ȱŸŠŒžž–ȱœ‘˜ž•ȱ‹Žȱ™›ŽœŽ—ȱ’—ȱ‘Žȱ
crankcase when the engine is operating. Pressure
’—ȱ‘ŽȱŒ›Š—”ŒŠœŽȱǻ—˜›–Š••¢ȱŒŠžœŽȱ‹¢ȱŠȱŒ•˜Žȱ˜›ȱ
’–™›˜™Ž›•¢ȱŠœœŽ–‹•Žȱ‹›ŽŠ‘Ž›ǼȱŒŠ—ȱŒŠžœŽȱ˜’•ȱ˜ȱ‹Žȱ
˜›ŒŽȱ˜žȱŠȱ˜’•ȱœŽŠ•œǰȱŠœ”Žœǰȱ˜›ȱ˜‘Ž›ȱŠŸŠ’•Š‹•Žȱœ™˜œǯ

›Š—”ŒŠœŽȱŸŠŒžž–ȱ’œȱ‹Žœȱ–ŽŠœž›Žȱ ’‘ȱŽ’‘Ž›ȱŠȱ
 ŠŽ›ȱ–Š—˜–ŽŽ›ȱ˜›ȱŠȱŸŠŒžž–ȱŠžŽȱǻœŽŽȱŽŒ’˜—ȱŘǼǯȱ
˜–™•ŽŽȱ’—œ›žŒ’˜—œȱŠ›Žȱ™›˜Ÿ’Žȱ’—ȱ‘Žȱ”’œǯ

˜ȱŽœȱ‘ŽȱŒ›Š—”ŒŠœŽȱŸŠŒžž–ȱ ’‘ȱ‘Žȱ–Š—˜–ŽŽ›DZ

ȱ ŗǯȱ —œŽ›ȱ‘Žȱœ˜™™Ž›Ȧ‘˜œŽȱ’—˜ȱ‘Žȱ˜’•ȱꕕȱ‘˜•ŽǯȱŽŠŸŽȱ

‘Žȱ˜‘Ž›ȱž‹Žȱ˜ȱ–Š—˜–ŽŽ›ȱ˜™Ž—ȱ˜ȱŠ–˜œ™‘Ž›Žǯȱ
Š”Žȱœž›Žȱ‘Žȱœ‘žȱ˜ěȱŒ•Š–™ȱ’œȱŒ•˜œŽǯ

2. Start the engine and run at no-load high speed

ǻřŘŖŖȱ˜ȱřŝśŖȱǼǯ

ȱ řǯȱ ™Ž—ȱ‘ŽȱŒ•Š–™ȱŠ—ȱ—˜Žȱ‘Žȱ ŠŽ›ȱ•ŽŸŽ•ȱ’—ȱ‘Žȱ

tube.

ȱ ȱ ‘Žȱ•ŽŸŽ•ȱ’—ȱ‘ŽȱŽ—’—Žȱœ’Žȱœ‘˜ž•ȱ‹ŽȱŠȱ–’—’–ž–ȱ

˜ȱ10.2 cm (4 in.) Š‹˜ŸŽȱ‘Žȱ•ŽŸŽ•ȱ’—ȱ‘Žȱ˜™Ž—ȱœ’Žǯ

ȱ ȱ ȱ‘Žȱ•ŽŸŽ•ȱ’—ȱ‘ŽȱŽ—’—Žȱœ’Žȱ’œȱ•Žœœȱ‘Š—ȱœ™ŽŒ’ꮍȱ

ǻ•˜ Ȧ—˜ȱŸŠŒžž–Ǽǰȱ˜›ȱ‘Žȱ•ŽŸŽ•ȱ’—ȱ‘ŽȱŽ—’—Žȱœ’Žȱ
’œȱ•˜ Ž›ȱ‘Š—ȱ‘Žȱ•ŽŸŽ•ȱ’—ȱ‘Žȱ˜™Ž—ȱœ’Žȱǻ™›Žœœž›ŽǼǰȱ
Œ‘ŽŒ”ȱ˜›ȱ‘ŽȱŒ˜—’’˜—œȱ’—ȱ‘ŽȱŠ‹•Žȱ‹Ž•˜ ǯ

ȱ Śǯȱ •˜œŽȱ‘Žȱœ‘žȬ˜ěȱŒ•Š–™ȱbefore stopping the

engine.

˜ȱŽœȱ‘ŽȱŒ›Š—”ŒŠœŽȱŸŠŒžž–ȱ ’‘ȱ‘ŽȱŠŒžž–Ȧ
›Žœœž›Žȱ ŠžŽȱ ’ȱǻœŽŽȱŽŒ’˜—ȱŘǼDZ

ȱ ŗǯȱ Ž–˜ŸŽȱ‘Žȱ’™œ’Œ”ȱ˜›ȱ˜’•ȱꕕȱ™•žȦŒŠ™ǯ

ȱ Řǯȱ —œŠ••ȱ‘ŽȱŠŠ™Ž›ȱ’—˜ȱ‘Žȱ˜’•ȱꕕȦ’™œ’Œ”ȱž‹Žȱ

opening.

ȱ řǯȱ žœ‘ȱ‘Žȱ‹Š›‹ŽȱęĴ’—ȱ˜—ȱ‘ŽȱŠžŽȱœ˜•’•¢ȱ’—˜ȱ

the hole in the adapter.

4. Start the engine and bring it up to operating

œ™ŽŽȱǻřŘŖŖȬřŜŖŖȱǼǯ

ȱ śǯȱ ‘ŽŒ”ȱ‘Žȱ›ŽŠ’—ȱ˜—ȱ‘ŽȱŠžŽǯȱȱ‘Žȱ›ŽŠ’—ȱ

is to the •ŽĞȱ˜ȱȃŖȄȱ˜—ȱ‘ŽȱŠžŽǰȱŸŠŒžž–ȱ˜›ȱ
—ŽŠ’ŸŽȱ™›Žœœž›Žȱ’œȱ’—’ŒŠŽǯȱȱ‘Žȱ›ŽŠ’—ȱ’œȱ˜ȱ
the rightȱ˜ȱȃŖȄȱ˜—ȱ‘ŽȱŠžŽǰȱ™˜œ’’ŸŽȱ™›Žœœž›Žȱ’œȱ
present.

ȱ ȱ ›Š—”ŒŠœŽȱŸŠŒžž–ȱœ‘˜ž•ȱ‹ŽȱȱŠȱ–’–’–ž–ȱ˜ȱ

Śȱ’—Œ‘Žœȱ˜ȱ ŠŽ›ǯȱȱ‘Žȱ›ŽŠ’—ȱ’œȱ‹Ž•˜ ȱ‘Žȱ
œ™ŽŒ’ęŒŠ’˜—ǰȱ˜›ȱ’ȱ™›Žœœž›Žȱ’œȱ™›ŽœŽ—ǰȱŒ‘ŽŒ”ȱ‘Žȱ
Š‹•Žȱ‹Ž•˜ ȱ˜›ȱ™˜œœ’‹•ŽȱŒŠžœŽœȱŠ—ȱ›Ž–Ž’Žœǯ

No Crankcase Vacuum/Pressure in Crankcase

Possible Cause

Solution

›Š—”ŒŠœŽȱ‹›ŽŠ‘Ž›ȱŒ•˜Žȱ˜›ȱ’—˜™Ž›Š’ŸŽǯ

’œŠœœŽ–‹•Žȱ‹›ŽŠ‘Ž›ǰȱŒ•ŽŠ—ȱ™Š›œȱ‘˜›˜ž‘•¢ǰȱ›ŽŠœœŽ–‹•Žǰȱ
and recheck pressure

ŽŠ•œȱŠ—Ȧ˜›ȱŠœ”Žœȱ•ŽŠ”’—ǯȱ˜˜œŽȱ˜›ȱ
’–™›˜™Ž›•¢ȱ˜›šžŽȱŠœŽ—Ž›œǯ

Replace all worn or damaged seals and gaskets. Make sure
Š••ȱŠœŽ—Ž›œȱŠ›Žȱ’‘Ž—ŽȱœŽŒž›Ž•¢ǯȱœŽȱŠ™™›˜™›’ŠŽȱ˜›šžŽȱ
ŸŠ•žŽœȱŠ—ȱœŽšžŽ—ŒŽœȱ ‘Ž—ȱ—ŽŒŽœœŠ›¢

’œ˜—ȱ‹•˜ ȱ‹¢ȱ˜›ȱ•ŽŠ”¢ȱŸŠ•ŸŽœȱǻŒ˜—ę›–ȱ‹¢ȱ
’—œ™ŽŒ’—ȱŒ˜–™˜—Ž—œǼ

ŽŒ˜—’’˜—ȱ™’œ˜—ǰȱ›’—œǰȱŒ¢•’—Ž›ȱ‹˜›ŽǰȱŸŠ•ŸŽœǰȱŠ—ȱŸŠ•ŸŽȱ
guides.

Restricted exhaust.

Ž™Š’›Ȧ›Ž™•ŠŒŽȱ›Žœ›’ŒŽȱ–žĝŽ›ȦŽ¡‘Šžœȱœ¢œŽ–

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