BENDIX TU-FLO 600 AIR COMPRESSOR Manual page 7

The discharge valve cap nuts should be inspected for wear
and replaced if excessive peening has occurred. To
determine if excessive peening has occurred, measure the
discharge valve travel. Discharge valve travel must not
exceed .046 inches (1.168 mm).
CRANKCASE BASE PLATE OR ADAPTER
Remove the cap screws securing the base plate or base
adapter. Tap with soft mallet to break the gasket seal. Scrape
off any gasket material from crankcase and plate or adapter.
CONNECTION ROD ASSEMBLIES
NOTE: Before removing the connecting rods, mark each
connecting rod and its cap. Each connecting rod is
matched to its own cap for proper bearing fit, and
these parts must not be interchanged.
Straighten the prongs of the connecting rod bolt lock strap
and remove the bolts and bearing caps. Push the piston
with the connecting rods attached out the top of the cylinder
block. Replace the bearing caps on their respective
connecting rods. Remove the piston rings from the pistons.
If the pistons are to be removed from the connecting rods,
remove the wrist pin lock wires and press the wrist pins
from the pistons and connecting rods. If the wrist pins have
teflon plugs, remove plugs, then press out the wrist pins.
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FIGURE 12 - TU-FLO 600 AIR COMPRESSOR CYLINDER
HEAD
If the pistons are removed from the rod, inspect the bronze
wrist pin bushing. Press out and replace the bushing if it is
excessively worn. (See inspection of parts.) Discard the
piston rings and the connecting rod journal bearings. Discard
the wrist pin bushings if they were removed (Fig. 13).
CRANKCASE (FIG. 14)
Remove end cover with oil seal, remove end cover gasket.
Replace oil seal after cleaning end cover.
Remove cap screws that hold opposite end cover to
crankcase; remove end cover and its gasket. Some
compressors have crankcases that have a shoulder for
positioning the crankshaft. In these cases, the crankshaft
must be removed through one particular end.
Press the crankshaft and ball bearings from the crankcase
then press ball bearings from crankshaft. Many compressors
will have sleeve type bearings in the crankcase or in the
end cover. If the clearance between crankshaft journal and
bearing exceeds .0065 in. (.165 mm) the sleeve bearing
should be replaced with appropriate undersize.
BLOCK (FIG. 15)
If compressor is fitted with an air strainer, inlet elbow or
governor, remove same.
Remove cap screws securing cylinder block to crankcase;
separate crankcase and cylinder block and scrape off gasket.
Remove unloader spring, spring saddle and spring seat from
cylinder block (Fig. 15).
Remove unloader guides and plungers and with the use of
shop air blow unloader pistons out of cylinder block unloader
piston bores.
Remove inlet valve guides; inlet valve seats can be removed,
but only if they are worn or damaged and are being
replaced. Unloader bore bushings should be inspected but
not removed unless they are damaged.
PREVENTATIVE MAINTENANCE
Regularly scheduled maintenance is the single most
important factor in maintaining the air brake charging system.
Refer to Table A in the Troubleshooting section for a guide to
various considerations that must be given to the maintenance
of the compressor and other related charging system
components.
CLEANING AND INSPECTION OF PARTS
CLEANING
All parts should be cleaned thoroughly in mineral spirits
before inspection.
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