BENDIX TCH-001-052 产品宣传页

© 2004 Bendix Commercial Vehicle Systems LLC.  All rights reserved.  4/2004.  Printed in U.S.A.

Figure 1: Inlet Check Valve (location varies by vehicle)

ICV

Inlet hose attaches here

Air flows

in this

direction

through valve

(continued over.)

If a DDC Series 60 low emission engine does not build
air, as part of the investigation to find the cause, you
may use the following test to check that the Inlet Check
Valve (ICV) is operating correctly.  We recommend
that other less labor-intensive inspections, for example,
to check for a leaking or broken discharge line, be
carried out before conducting this test.

Before beginning this test, read the complete
instructions, and follow all standard safety practices
including, but not limited to, the General Precautions
listed below.  With the vehicle parked and the wheels
blocked, shut off the engine. Clean the area around
the ICV of road grime, etc.

Disassembly
To test the ICV, disconnect the hose that supplies air
from the inlet air supply system of the engine to the
ICV.  Carefully remove the clamp holding the inlet
hose from the ICV - see Figure 1 for a typical inlet
hose location.  Retain the clamp for re-installation.
Note that the ICV has a raised flange on the side
through which the air enters.  This test will necessitate
the removal of the ICV from the vehicle, therefore
remove the mounting hardware attaching it to the
vehicle - in some instances it will be easier to remove
the mounting bracket from the engine to assist with
the disassembly.

Test the ICV
Caution: Eye protection equipment must be worn
during this procedure to prevent eye injury in the event
loose material is expelled from the ICV port.  On a
test bench securely mount the ICV.  Attach a non-
pressurized shop air supply line to the delivery side of
the ICV using any necessary fittings.  Apply shop air
to the ICV and, with caution, observe the inlet port of
the ICV for air being expelled.  A correctly operating
ICV will produce only a small amount of air coming
(backwards) through the valve.  A malfunctioning ICV
will release a full burst of air (similar to a blow nozzle).
End the test by shutting off the shop air.

If the ICV is operating normally, reinstall the ICV
by reversing the steps taken to remove it from the
vehicle.  Re-attach the inlet hose using the clamp
retained during disassembly, ensuring a good seal
between the hose and the fitting.  Consult other
troubleshooting materials and vehicle manuals to help
you investigate why the compressor is not building
air.

In the case of a malfunctioning ICV, where the
compressor does not built air, replace the ICV valve
and the compressor because of possibility of debris in
the system.

INJURY OR DEATH:
When working on or around a vehicle, the following

General Precautions should be observed at all times:
1.

Park the vehicle on a level surface, apply the

parking brakes, and always block the wheels.

2.

Stop the engine when working around the vehicle.

3.

Except as directed in these instructions, make

certain to drain the air pressure from all reservoirs

before beginning any work on the vehicle.