Page 266 - Reciprocating Compressors Operation Maintenance

Overhaul and Repair of Reciprocating Compressors 251

Anchor Bolt Hole Clearance
6088 of *.»•.', xvJbft \~\ ^ Crush Provided
Machine f^f-f> m , ^ by Polyurethane
I II I ^B \ Sleeve to Seal
Grout Pour N$M ^ | W \ void Provided by
8-12" Core ^^ • il \ Clearance of
8-12 oore HC4 ^ im \ Anchor Bolt Hole
ch
s
Closed-Cell ll • fW \ K®l . ?®? tion
Polyurethane-
Sleeve
2nd Epoxy
Grout Pour
Threaded
Coupling
1st Epoxy Grout
Pour
Lower Anchor Bolt fEjfi H jlj \ Anchor Section of
s ud
' ^ • Hi /the Anchor Bolt
Anchor Plate and
Upper and Lower
Nuts

FIGURE 4-12. Anchor bolt replacement.

been installed, epoxy grout is poured to replace the concrete chipped
from around the original bolt and the concrete removed by the coring.

COMPRESSOR BEARING MAINTENANCE AND REPLACEMENT

Premature bearing wear or failure is usually caused by a combination
of factors. Mechanical overload, dirt, and incorrect installation are some-
times involved. But misalignment, improper lubrication, and overheating
are by far the major causes of serious journal, bearing and mainframe
damage. Such damage can be difficult to spot and often goes undetected
for a time. Even though oil flow to one bearing may drastically deviate
from the norm, oil pressure and temperature indicated on gauges may
still appear normal if the problem is limited to a single oil line.
That's just one example of the many reasons manufacturers' recom-
mendations on periodic inspection of bearings, crankshaft, and other
components are so important. Whenever there is a need to replace a main
or crankpin bearing, the analyst should ask why the bearing required
replacing. Always investigate possible causes and determine if other