Bendix Commercial Vehicle Systems TU-FLO 550 COMPRESSOR 6/08 - Manual (Page 6)

6
COMPRESSOR TURBOCHARGING
PARAMETERS
Air entering the compressor inlet during the loaded cycle
must not exceed 250 degrees Fahrenheit (121 degrees
Celsius). A metal inlet line is suggested to help meet this
parameter.
The following compressor crankshaft rotative speed and
inlet pressure relationships may not be exceeded.
Crankshaft Maximum Compressor
R.P.M. Inlet Pressure
2200 RPM 30.0 psi (207 kPa)
2600 RPM 25.0 psi (172.5 kPa)
POLYURETHANE SPONGE STRAINER
Every month, 150 operating hours or 5,000 miles,
whichever occurs fi rst, remove and wash all of the parts.
The strainer element should be cleaned or replaced. If the
element is cleaned, it should be washed in a commercial
solvent or a detergent and water solution. The element
should be saturated in clean engine oil, then squeezed
dry before replacing it in the strainer. Be sure to replace
the air strainer gasket if the entire strainer is removed from
the compressor intake.
PAPER AIR STRAINER DRY ELEMENT-PLEATED
POLYURETHANE SPONGE STRAINER
FIGURE 10 - STRAINERS
PREVENTIVE 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.
Important Note: Review the warranty policy before
performing any intrusive maintenance procedures. An
extended warranty may be voided if intrusive maintenance
is performed during this period.
AIR INDUCTION
One of the single most important aspects of compressor
preventive maintenance is the induction of clean air.
The type and interval of maintenance required will vary
depending upon the air induction system used.
The intervals listed under the headings below pertain
to typical highway and street operation. More frequent
maintenance will be required for operation in dusty or
dirty environments.
DRY ELEMENT - PLEATED PAPER STRAINER
Every two months, 800 operating hours or 20,000 miles
whichever occurs fi rst, loosen the spring clip from the
unhinged side of the mounting baffl e and open the cover.
Replace the pleated paper fi lter and secure the cleaned
cover, making sure the fi lter is in position. Be sure to replace
the air strainer gasket if the entire air strainer is removed
from the compressor intake.
0
20
25
15
35
5
30
2700 2400 2100 1800 1500 1200 900 600
10
Compressor Speed (RPM)
Turbo Limits
40
FIGURE 9 - TURBO LIMITS CURVE
Inlet Pressure (PSIG)