Kohler COMMAND CH18-745 User Manual download pdf (Page 24)

3.3

Section 3

Troubleshooting

• Check the condition of the oil. Drain the oil into a

container - the oil should flow freely. Check for

metal chips and other foreign particles.

Sludge is a natural by-product of combustion; a

small accumulation is normal. Excessive sludge

formation could indicate overrich carburetion, weak

ignition, overextended oil change interval or wrong

weight or type of oil was used, to name a few.

NOTE: It is good practice to drain oil at a location

away from the workbench. Be sure to

allow ample time for complete drainage.

Cleaning the Engine

After inspecting the external condition of the engine,

clean the engine thoroughly before disassembling it.

Also clean individual components as the engine is

disassembled. Only clean parts can be accurately

inspected and gauged for wear or damage. There are

many commercially available cleaners that will quickly

remove grease, oil, and grime from engine parts.

When such a cleaner is used, follow the

manufacturer’s instructions and safety precautions

carefully.

Make sure all traces of the cleaner are removed

before the engine is reassembled and placed into

operation. Even small amounts of these cleaners can

quickly break down the lubricating properties of engine

oil.

Basic Engine Tests

Crankcase Vacuum Test

A partial vacuum should be present in the crankcase

when the engine is operating at normal temperatures.

Pressure in the crankcase (normally caused by a

clogged or improperly assembled breather) can cause

oil to be forced out at oil seals, gaskets, or other

available spots.

Crankcase vacuum is best measured with either a

water manometer (SPX Part No. KO1048, formerly

Kohler Part No. 25 761 02-S) or a vacuum gauge (SPX

Part No. KO3223, formerly Kohler Part No.

25 761 22-S). Complete instructions are provided in the

kits.

To test the crankcase vacuum with the manometer:

1. Insert the stopper/hose into the oil fill hole. Leave

the other tube of manometer open to atmosphere.

Make sure the shut off clamp is closed.

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

(3200 to 3750 RPM).

3. Open the clamp and note the water level in the

tube.

The level in the engine side should be a minimum

of 10.2 cm (4 in.) above the level in the open

side.

If the level in the engine side is less than

specified (low/no vacuum), or the level in the

engine side is lower than the level in the open

side (pressure), check for the conditions in the

table on page 3.4.

4. Close the shut off clamp before stopping the

engine.

To test the crankcase vacuum with the Vacuum/

Pressure Gauge Kit (SPX Part No. KO3223):

1. Remove the dipstick or oil fill plug/cap.

2. Install the adapter into the oil fill/dipstick tube

opening, upside down over the end of a small

diameter dipstick tube, or directly into engine if a

tube is not used.

3. Push the barbed fitting on the gauge solidly into

the hole in the adapter.

4. Start the engine and bring it up to operating

speed (3200-3600 RPM).

5. Check the reading on the gauge. If the reading is

to the left of “0” on the gauge, vacuum or negative

pressure is indicated. If the reading is to the right

of “0” on the gauge, positive pressure is present.

Crankcase vacuum should be 4-10 (inches of

water) If the reading is below specification, or if

pressure is present, check the following table for

possible causes and remedies.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 217 218

Comments to this Manuals

No comments

Kohler COMMAND CH18-745 User Manual Page 24

Comments to this Manuals

Related products and manuals for For the car Kohler COMMAND CH18-745