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Reciprocating Gas Engines and  Compressors   217








                                             Table 5-1
                   Routing of FieldBhop Honing of Reciprocating Compressor Cylinder

                      NO.    Opnflon                 Deacription
                       1   Uksb out cylinder.   Thoroughly wash cylinder with kerosene or varsol: remove all de
                                       posits of carbon and oil.
                       2   Dry cylinder.   Dry cylinder with a clean, lint-free rag.
                       3   De.tennine wndiion.  Check cylinder to determine exact honing requirements.
                       4   Remove build-up  and  Cylinder Has Been Scored to Depths of Ova 0.005 ':  Use a come
                          dress down cylinder.   stone (#136) to remove the extra build-up and dress down the cyl-
                                       inder walls; leave a depth of  0.002'  to be fmished with a KL36
                                       stone.
                                       scoring Is Less Than 0.002'
                                       Deglaze cylinder
                       5   Deglaze cylinder.   To deglaze use a #236 stone or a #200 series stone-follow  pmcc-
                                       dum outlined in Step 9.
                                       Using Stow: All stones must be used dry on cast iron cylinders.
                                       Keep stones and guide blocks together, and use as sets; never use
                                       the same pair of guide blocks with different se~s of stones.
                                       Hone Driving Motor: For  best results, use  an  airdriven slow
                                       speed drill (250-100) rpm). The drill must have right-hand rota-
                                       tion, and have a 314" or larger chuck size.
                       6   Insert  and  expand  Insert and expand stones ad guides firmly against cylinda walls
                          stones  and  guides  by turning clockwisethe winged collar onthe hone. Note: During
                          against cylinder walls.  this adjustment stones should not extend more than Ih" out of the
                                       cylinder.
                       7   Hone cylinder.   a.  Push stone to bottom of cyliider; allow stones to go through
                                        lower end of the bore lh  to 1 I.
                                       b.  Start stroking at bottom of cylinder using short strokes to wn-
                                        centrate honing in the smallest and important section of cylin-
                                        der.
                                       e. Gradually lengthen stroke as -1   is ramwed and stones con-
                                        tact higher on cylinder walls. Stroke all the way to top of cyli
                                        der:  mainrain a wnstant steady suoke of abcut 30 cycles per
                                         minute.
                                       Cylinder Condition-An  exeellent indication of cylinder condition
                                       is speed of the drill. A reduction in drill speed during honing indi-
                                       cates a smaller dmeter; localize stroking at such sections until
                                       drill speed is constant over at least 75 I$ of cylinder length.
                       8   Check for cylinder ap-  After free stroking (including no binding) for approximately ollc
                          pearam.      minute, remove stone and check for cyliia appearance.
                                       Fiished Cylinder-For  ideal seating, finished cylinder should in-
                                       dicate a diamond-shaped hatch pattern as follows:
                                        For Bronze Piston Rings: 24-30  micro-inches.
                                        Far Teflon Rings:  16-20  micm-iioches.
                                       DO NOT OVER-HONE. If finish is too fine, oil consumption will
                                       be excessive. Use roughness comparators to check finish.
                       9   Clea!!Cylir   Use a soap and water solution to remove small particles off the
                                       cylinder and hone stone which would cause rapid wear.
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