Page 235 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair
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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.