SUPPORT AS 2945351 - Caterpillar

Illustration 16 g01179336
Control valves for feed and speed.
Stop the hone at regular intervals to measure the new bore size and determine whether all bore damage has been removed. Plan to stop the honing head and stones at the open end of the cylinder. This action avoids scratching the bore as the honing head is withdrawn from the bore.
Rotate the hand wheel clockwise until the stones are compressed. Move the right cylinder stop to facilitate honing head removal.
If all scratches have been removed, or if the bore is within 0.025 to 0.051 mm (0.001 to 0.002 inch) of the final bore size, no further rough honing is needed.
Change to finishing stones and repeat the honing process.
Hone the bore with finishing stones until the desired bore size is reached and the surface finish is 0.40 to 0.80 µm (16 to 32 microinch).Troubleshooting
Note: Items to check include the stones, mandrel, oil, pressure, and speed.
Stones - be sure that the proper stones are being used. Be sure that the stones are not too hard or too soft and are the proper grit for the application.
Mandrel - make sure that the Mandrel is of the correct size, alignment, design. The mandrel should be straight and true.
Oil - Oil should have the correct lubricity and be clean, free of all foreign debris.
Pressure - be sure that the pressure is set correctly. Make sure that the pressure is not set too high so that the stones are being crushed or too soft so that the stones are loose in the cylinder bore.
Speed - vary the speed to find the best speed for your particular application.Also see reference chart for troubleshooting information.
Table 10
Honing Troubleshooting Guide    
Condition to be Corrected    Step 1    Step 2    Step 3    Step 4    Step 5    
Slow stock removal
    Increase the spindle speed     Increase the cutting pressure     Use only 9U-6484 Honing Oil (1)     Use softer stones     Use coarser grit stones    
Stones not cutting
    Stones are glazed (stone surface looks clean but cutting grains are dulled)     Sharpen A or J stones with a 9U-6748 Dressing Stick     Increase the cutting pressure     Increase the stroking speed     Use softer stones (one with a lower hardness number)     Make sure that 9U-6484 Honing Oil is being used (1)    
Stones are loaded (stone surface looks smeared and clogged with chips) Clean the stones with a 9U-6748 Dressing Stick .     Increase the stroking speed.     Use softer stones (one with a lower hardness number).     Use coarser grit stones (one with a lower grit number).    
Poor stone life
    Decrease the cutting pressure     Use a faster spindle speed     Use harder stones (one with a higher hardness number)     Use coarser grit stones (one with a lower grit number)    
Chatter     Vary the rpm and stroke rate     Relieve the guides
1.00 mm (0.039 inch)     Reduce the cutting pressure     Switch to guideless stones unless the bore has a