BENDIX Tu-Flo 550 - Page 2

Oil Accumulation During Storage and
Shipping
Compressors may accumulate oil above the piston due to
the position in which the compressor has been handled in
storage and shipment. After the compressor has been fully
installed but with the discharge hose not connected, the
technician, wearing eye protection, may start the engine to
blow out any trapped oil, taking care to use shop rags (or
similar) to capture any expelled oil. Run the engine until the
oil is purged. Shut down the engine and install the discharge
line. Note: An initial discharge of oil does not signify
an oil passing compressor.
Assembly Torque Specifications (in-lbs)
Pipe Plugs
1
/
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35-50 in. lbs.
1
/
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85-105 in. lbs.
1
/
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 130-170 in. lbs.
3
/
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 160-200 in. lbs.
1
/
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-270 in. lbs.
M18 . . . . . . . . . . . . . . . . . . . . . . . . . .
230-260 in. lbs.
Pipe Bushing
1
/
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 175-225 in. lbs.
Air Inlet Fitting/Strainer
Strainer
. . . . . . . . . . . . . . . . . . . . . . . . 125-150 in. lbs.
Inlet Fitting . . . . . . . . . . . . . . . . . . . . .
175-225 in. lbs.
Bottom Cover
Discharge Fitting . . . . . . . . . . . . . . . .
175-225 in. lbs.
Crankshaft Plug . . . . . . . . . . . . . . . . .
180-230 in. lbs.
Crankshaft Nut (Castellated) . . . . . .
1440 Max in. lbs.
Crankshaft Nut (Marsden) . . . . . . . .
1440 Max in. lbs.
Crankshaft Nut (DDC S-60)
. . . . . . . 3050 Max in. lbs.
Governor
Governor mounting bolts . . . . . .
175-225 Max in. lbs.
NOTE: Inspection torque and assembly torque are not equivalent
measures. The inspection torque value may differ from the assembly
torque indicated in the chart above.
For detailed service information on Bendix compressors
consult the appropriate Bendix service data sheet:
For Tu-Flo
®
550
™
Compressors, see SD-01-333.
For Tu-Flo
®
750
™
Compressors, see SD-01-344.
These are available for free download on www.bendix.com,
or may be ordered at any authorized Bendix parts outlet.
S-1458 © 2006 Bendix Commercial Vehicle Systems LLC 1/06 Printed in U.S.A. All Rights Reserved.
needs to be supplied to the cylinder head to prevent
overheating etc.
It is recommended that coolant lines:
A) Be inspected, and damaged or restricted lines be
replaced.
B) Have a minimum internal diameter of 0.5 inches for
low air use applications, and up to
5
/
8
" I.D. for high air use
applications (See the Bendix Service Data sheet for the
compressor for full details).
C) The coolant lines should be connected so that coolant
enters the cylinder block at one end of compressor and
exits the cylinder head at the opposite end.
3. Air supply - factors include: air quality (e.g. maintenance
of air filters) as well as sufficient quantity at the intake (e.g.
unrestricted, uncollapsed supply hoses.) Inspect engine
or compressor air cleaner and replace as necessary.
Check compressor air inlet line for kinks, excessive bends
and be certain inlet lines have the minimum specified
inside diameter (
5
/
8
"). Recommended maximum air inlet
restriction is 25" of water. Install a new inlet gasket. The
compressor intake should not be connected to any part
of the exhaust gas recirculation (E.G.R.) system on the
engine.
4. Air delivery. Delivery hoses need to be of sufficient
diameter and be inspected for kinks, and other
obstructions, including carbon build-up. Delivery hoses
must slope down from the compressor to the air dryer
intake. Replace discharge lines as necessary using only
copper tubing or approved flexible hose.
5. Remove all thread protectors from head, cylinder block
and end covers.
6. Use a small amount of thread sealant on mounting
hardware and do not overtighten pipe plugs.
7. Mount the compressor using a new gasket (typically
supplied in the kit) and tighten the mounting hardware
as recommended by vehicle or engine manufacturer.
Synthetic gasket sealing & forming materials are not
recommended for compressor mounting; however,
if used, special care should be taken to ensure that
internal oil supply & return passages are completely
unobstructed.
Where applicable, other items to consider during
installation are crankshaft nut torques:
Do not exceed 120 foot pounds of torque on crankshaft
nut when installing drive gear or pulley. The castellated
nut should be torqued by hand to 100 ft-Ibs. If it is not
possible to line up the cotter pin holes without exceeding
150 ft-lbs., the nut should be removed and another nut
used. Not all compressors are supplied with a crankshaft
nut.
NOTE: Detroit diesel series 60 compressor crankshaft
nuts or bolts must be torqued to 220-254 ft. lbs.