BENDIX TU-FLO 501 AIR COMPRESSOR Manuel d'utilisateur télécharger pdf (Page 11)

Position and install the inlet valve guides, then drop the inlet

valves in their guides. The inlet valves should be a loose

sliding fit in the guides.

During this test, the compressor should be checked for

gasket leakage and noisy operation, as well as unloader

operation and leakage.

INSPECTION OF REBUILT UNIT

Check to be sure that covers, plugs, or masking tape are

used to protect all ports if compressor is not to be installed

immediately. Fit the end of all crankshafts with keys, nuts,

and cotter pins as required and then protect the ends against

damage by wrapping with masking tape or friction tape. The

open bottom of a vertical engine lubricated compressors

should be protected against the entrance of dirt during

handling or storage, by installing a temporary cover over

the base.

COMPRESSOR TROUBLESHOOTING

IMPORTANT: The troubleshooting contained in this section

considers the compressor as an integrated component of

the overall air brake charging system and assumes that an

air dryer is in use. The troubleshooting presented will cover

not only the compressor itself, but also other charging system

devices as they relate to the compressor.

WARNING! PLEASE READ AND FOLLOW

THESE INSTRUCTIONS TO AVOID

PERSONAL 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.

Always wear safety glasses.

2. Stop the engine and remove ignition key when

working under or around the vehicle. When

working in the engine compartment, the engine

should be shut off and the ignition key should be

removed. Where circumstances require that the

engine be in operation, EXTREME CAUTION should

be used to prevent personal injury resulting from

contact with moving, rotating, leaking, heated or

electrically charged components.

3. Do not attempt to install, remove, disassemble or

assemble a component until you have read and

thoroughly understand the recommended

procedures. Use only the proper tools and observe

all precautions pertaining to use of those tools.

4. If the work is being performed on the vehicle’s air

brake system, or any auxiliary pressurized air

systems, make certain to drain the air pressure

from all reservoirs before beginning ANY work on

the vehicle. If the vehicle is equipped with an

AD-IS

™

air dryer system or a dryer reservoir module,

be sure to drain the purge reservoir.

5. Following the vehicle manufacturer’s

recommended procedures, deactivate the electrical

system in a manner that safely removes all electrical

power from the vehicle.

FIGURE 16 - UNLOADER MECHANISM

Cylinder Head

Install the inlet valve springs in the cylinder head by applying

a turning motion to the spring after it is in the head. The

turning motion should dig the spring wire into the spring

seat in the bottom of the spring bore in the head. Should

this procedure fail after repeated attempts, use a very small

quantity of grease to hold them in place, just enough to

keep the springs from failing out. Place the cylinder head

gasket on the cylinder block. Carefully align the cylinder

head assembly on the block and install the cap screws,

tightening them evenly to a torque of 25-30 foot pounds.

Base Plate or Base Adapter

Position the base plate or base adapter gasket on the

crankcase and install the base plate or base adapter as

marked before disassembly. Tighten the six cap screws

securing the cast iron base adapter evenly to a torque of

38-45 foot pounds, and 12-16 foot pounds for base plate or

aluminum cover.

Testing Rebuilt Compressor

In order to properly test a compressor under operating

conditions, a test rack for correct mounting, cooling,

lubricating, and driving the compressor is necessary. Such

tests are not compulsory if the unit has been carefully rebuilt

by an experienced person. A compressor efficiency or

build-up test can be run which is not too difficult. An engine

lubricated compressor must be connected to an oil supply

line of at least 15 P.S.I. pressure during the test and an oil

return line must be installed to keep the crankcase drained.

Connect to the compressor discharge port, a reservoir with

a volume of 1500 cubic inches, including the volume of

connecting line. With the compressor operating at 2100

R.P.M., the time required to raise the reservoir(s) pressure

from 85 P.S.I. to 100 P.S.I. should not exceed 7 seconds.

1 2 ... 6 7 8 9 10 11 12

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BENDIX TU-FLO 501 AIR COMPRESSOR Manuel d'utilisateur Page 11

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