Page 237 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Reciprocaring Gas hgines and Compressors 219

Inspect Power Cylinders with Boroscope. * Remove spark plug or
gadair injection valve. Insert boroscope into cylinder, and examine
cylinder wall, valves andlor ports for abnormal conditions.
Check Condition and Clearance-Master Rod Bearings. Visually in-
spect bearing for signs of deterioration. Check bearing clearance
with dial indicator and jack.

Check Fuel Gus Injection Wves. One could plan that a spare set of
valves would be installed once each year under this preventive main-
tenance step. Valves removed would be repaired as needed and then
warehoused for another unit, or for the next changenut.
Check Air Starring klves. It could be planned that a spare set of
valves would be installed once each year under this preventive main-
tenance step. Valves removed would be repaired as needed and then
warehoused for the next unit, or for the next changeout.
Check Compression on All Power Cylinders. Remove spark plugs,
insert compression tester, rotate engine, and record compression
pressure on each power cylinder. This test confirms condition of
rings and/or valves. Repair as needed.
Run Bridge Gauge on Power Milves. Use special bridge gauge avail-
able from engine manufacturer, and with thickness gauge, determine
amount of wear of existing valve.
Turbocharger- Clean Blades and Inspect Bearings. Remove existing
turbocharger and install spare. Disassemble existing turbocharger
and repair as needed.

Compressor

Inspect Compressor Piston Rod. After removing distance piece cov-
ers, visually inspect or feel with hands the compressor piston rod for
signs of wear or scuffing.
Inspect Compressor Wves-Suction and Discharge. All suction and
discharge valves should be removed from the cylinder, tested with a
solvent, rcpaired as needed, and returned to the cylinder.
Inspect Compressor Piston Rings. Remove compressor piston from
cylinder and confirm that compressor piston rings are in good oper-
ating condition. Measure amount of wear on each ring; if wear is ex-
cessive, replace rings.

* Endoscope