BENDIX AD-9 Data Layanan - Halaman 13
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Typical P&D, School Bus and Line Haul
The minimum discharge line length is 6 feet and the maximum is 16 feet.
LENGTH
l.D. MIN.
6.0 - 9.5 ft. ......... 1/2 in. ........... None
9.5 - 12 ft. ........... 1/2 in. ........... Last 3 feet including Supply Port fitting must
12 - 16 ft. ............ 5/8 in. ........... Last 3 feet including Supply Port fitting must
If the discharge line length must be less than 6 feet or greater
than 16 feet, contact your local Bendix representative or
authorized parts outlet for further information.
High Duty Cycle Vehicles
(City Transit Coaches, Refuse Haulers, etc.)
The minimum discharge line length is 10 feet and the maximum is 16 feet.
LENGTH
l.D. MIN.
OTHER REQUIREMENTS
10-16 ft. ........ 1/2 in. ........ None
If the discharge line length must be less than 10 feet or greater
than 16 feet, contact your local Bendix representative or
authorized parts outlet for further information.
DELIVERY LINE
1. Install an air line of the same approximate l.D. as the
discharge line between the AD-9 air dryer delivery port
and the first (supply) reservoir. This line should also slope
downward to the reservoir, if possible.
EXHAUST LINE
1. If it is necessary to direct AD-9 air dryer discharge
contaminants away from vehicle components it may be
necessary to purchase a special exhaust cover for the
AD-9 air dryer (Pc. No. 298924) to replace the standard
exhaust cover furnished with the unit. A 1 inch (25.4
mm) I.D. hose can be clamped on the special AD-9 air
dryer exhaust cover. Note: Use a thin flat blade to pry
the standard exhaust cover off.
WIRING THE HEATER/THERMOSTAT
1. Determine the vehicles electrical system voltage and
make certain that the AD-9 air dryer that is to be installed
OTHER REQUIREMENTS
be insulated with 1/2 inch thick closed cell
polyethylene pipe insulation.
be insulated with 1/2 inch thick closed cell
polyethylene pipe insulation.
contains the same voltage heater. Use the AD-9 air dryer
part number to confirm the proper voltage. The AD-9 air
dryer is available with either a 12 or 24 volt heater which
uses 75 watts of power.
2. A two lead, 12 inch, wire harness with attached weather
resistant connector is supplied with all retrofit and
replacement AD-9 air dryers. Connect one of the two
leads of the wire harness to the engine kill or ignition
switch. The remaining lead of the wire harness must be
connected to a good vehicle ground (not to the air dryer
or its mounting bracket). A fuse should be installed in
the power carrying wire; install a 10 amp fuse for 12 volt
heaters and a 5 amp fuse for a 24 volt heater.
3. Use 14 GA wire if it is necessary to lengthen the wire
harness provided with the AD-9 air dryer. Make certain
all wire splices are waterproofed.
4. Tie wrap or support all electrical wire leading to the AD-
9 air dryer at 6 - 8 inch intervals. Note: Wires should
have sufficient slack and not completely taught.
TESTING THE AD-9
Before placing the vehicle in service, perform the following
tests:
1. Close all reservoir drain cocks.
2. Build up system pressure to governor cut-out and note
that the AD-9 air dryer purges with an audible escape of
air.
3. Fan the service brakes to reduce system air pressure
to governor cut-in. Note that the system once again builds
to full pressure and is followed by a purge at the AD-9 air
dryer exhaust.
4. It is recommended that the following items be tested for
leakage to assure that the AD-9 air dryer will not cycle
excessively.
(A) Total air system leakage (See Bendix publication
BW-5057 Air Brake Handbook).
(B) Compressor unloader mechanism.
(C) Governor.
(D) Drain cock and safety valve in first (supply) reservoir.
(E) All air connections leading to and from the first
(supply) reservoir.
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