Kohler CV1000 User Manual download pdf (Page 95)

Section 9

Inspection and Reconditioning

9.3

11 mm (0.433 in.)

Measure 11 mm above the

Bottom of Piston Skirt at

Right Angles to Piston Pin

accomplished at a drill speed of about 250 RPM and

ŜŖȱȱȱǯȱĞȱȱȱȱȱ

hone, proceed as follows:

ȱ ŗǯȱ ȱȱȱȱȱĞȱǰȱȱ

so the stones are in contact with the cylinder

ǯȱȱȱȱȱĴȬȱȱȱ

recommended.

2. With the lower edge of each stone positioned

even with the lowest edge of the bore, start drill

and honing process. Move the hone up and down

ȱ£ȱȱȱȱȱȱĴȱ

ridges. Check the size frequently.

Ǳȱ ȱȱȱȬȱȱ

exacting tolerances. When oversizing a

cylinder, it should be machined exactly

0.25 mm (0.010 in.) or 0.50 mm (0.020 in.)

over the new diameter (Section 1). The

ȱ£ȱȱȱ

ȱȱȱęȱ¢ǯ

3. When the bore is within 0.064 mm (0.0025 in.) of

the desired size, remove the coarse stones and

replace them with burnishing stones. Continue

with the burnishing stones until the bore is

within 0.013 mm (0.0005 in.) of the desired size

ȱȱȱęȱȱǻŘŘŖȬŘŞŖȱǼȱȱ

ȱȱȱȱȱęȱ£ǯȱȱȱ

should be observed if honing is done correctly.

The crosshatch should intersect at approximately

ŘřǚȬřřǚȱěȱȱ£ǯȱȱĚȱȱȱȱ

cause the rings to skip and wear excessively,

and too steep an angle will result in high oil

consumption. See Figure 9-3.

Figure 9-3. Cylinder Bore Crosshatch after Honing.

ȱ Śǯȱ Ğȱ£ǰȱȱȱȱȱǰȱ

taper, and size. Use an inside micrometer,

telescoping gauge, or bore gauge to take

measurements. The measurements should be

taken at three locations in the cylinder – at the

ǰȱǰȱȱĴǯȱȱȱ

should be taken (perpendicular to each other) at

each of the three locations.

Clean Cylinder Bore After Honing

Proper cleaning of the cylinder walls following boring

and/or honing is very critical to a successful overhaul.

ȱȱĞȱȱȱ¢ȱȱȱ¢ȱ

ȱȱȱȱȱȱȱȱȱĞȱȱ

rebuild.

ȱęȱȱȱȱ¢ȱȱȱ

thorough scrubbing with a brush and hot, soapy

water. Use a strong detergent that is capable of

breaking down the machining oil while maintaining

a good level of suds. If the suds break down during

cleaning, discard the dirty water and start again

with more hot water and detergent. Following the

scrubbing, rinse the cylinder with very hot, clear

water, dry it completely, and apply a light coating of

engine oil to prevent rusting.

Measuring Piston-to-Bore Clearance

Before installing the piston into the cylinder bore, it

is necessary that the clearance be accurately checked.

ȱȱȱĞȱǰȱȱȱȱȱȱ

ȱȱęǰȱȱȱȱ¢ȱ

result.

NOTE: Do not use a feeler gauge to measure piston-

to-bore clearance – it will yield inaccurate

measurements. Always use a micrometer.

Use the following procedure to accurately measure

the piston-to-bore clearance:

1. Use a micrometer and measure the diameter of

the piston 11 mm (0.433 in.)ȱȱȱĴȱȱ

the piston skirt and perpendicular to the piston

pin. See Figure 9-4.

Figure 9-4. Measuring Piston Diameter.

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 137 138

Comments to this Manuals

No comments

Kohler CV1000 User Manual Page 95

Comments to this Manuals

Related products and manuals for Engine Kohler CV1000