11
3. Install the o-ring on the purge piston, then install the
piston in the body taking care not to cut the piston
o-ring.
4. Install the non-metallic exhaust cover and spring in the
body.
5. Install the retaining ring in the ring in the body, making
certain that it is fully seated in its groove.
6. If so equipped, reconnect the exhaust line from the
exhaust port of the air
7. Before placing vehicle back into service, perform the
Operation & Leakage Tests stated elsewhere in this
manual.
ASSEMBLY - HEATER AND THERMOSTAT
1. Lubricate the connector o-ring with a silicone grease
only, such as those packaged with Bendix maintenance
kits.
2. Install the o-ring on the connector, then slide the heater
and thermostat assembly into the body making certain
not to cut the o-ring. Note that the "tab" on the assembly
fits into the corresponding slot in the body.
3. Install the retaining ring in the ring in the body, making
certain that it is fully seated in its groove.
4. Apply a dielectric grease on the heater and thermostat
connector contacts (both the heater and thermostat and
vehicle wiring harness connector halves).
5. After making certain the accordion seal is in place on
the vehicle wire harness connector, connect the wire
harness to the heater and thermostat assembly on the
dryer until its lock tab snaps ("clicks") into place.
6. Before placing vehicle back into service, perform the
Operation & Leakage Tests stated elsewhere in this
manual.
ASSEMBLY- DESICCANT CARTRIDGE
1. Lubricate the desiccant cartridge sealing ring with a
silicone grease only, such as those packaged with
Bendix maintenance kits and replacement parts.
2. Screw the desiccant cartridge on to the body, by hand,
until the seal makes contact with the body and rotate
clockwise approximately one full turn. If necessary,
place a strap wrench or equivalent tool on the desiccant
cartridge next to the lip low on the cartridge.
3. Before placing vehicle back into service, perform the
Operation & Leakage Tests stated elsewhere in this
manual.
INSTALLATION
1. Install the assembled AD-SP
™
air dryer back onto the
vehicle using the same three mounting bolts retained
during removal. Tighten, then torque the three cap screws
to 50 lb. ft.
2. Reconnect the three air lines to the proper ports on the
body (identified during disassembly). If the fittings were
removed from the body, use a thread sealant making
certain none enters the body during re-installation
3. Apply a dielectric grease on the heater and thermostat
connector contacts (both the heater and thermostat and
vehicle wiring harness connector halves).
4. After making certain the accordion seal is in place on
the vehicle wire harness connector, connect the wire
harness to the heater and thermostat assembly on the
dryer by plugging it into the air dryer connector until its
lock tab snaps ("clicks") into place.
5. If so equipped, reconnect the exhaust line to the exhaust
port of the air dryer.
6. Before placing vehicle back into service, perform the
Operation & Leakage Tests stated elsewhere in this
manual.
RETROFITTING THE AD-SP
™
AIR DRYER
GENERAL
The following retrofit instructions are presented for reference
purposes only since Bendix aftermarket retrofit and
replacement air dryers are packaged with the most up-to-
date installation instructions. The instructions packaged
with the AD-SP
™
air dryer should be followed instead of
those presented here.
The preceding portion of this manual deals with "in-service"
repair and or replacement of the AD-SP
™
air dryer. The portion
of the manual that follows is concerned with installing an
AD-SP
™
air dryer on a vehicle not previously equipped with
one.
VEHICLE APPLICATION REQUIREMENTS
The basic application requirements presented here apply
to a standard air dryer installation. The majority of vehicles
in use today will meet these basic requirements however,
some may not.
The following are examples of vehicles where the AD-SP
™
air dryer should not be used: bulk trailer unloading
operations, city transit coaches, trash compactors and other
high air consumption or continuous flow systems. When
vehicles of this type are encountered other Bendix air dryer
models must be used. Consult your local authorized Bendix
parts outlet or sales representative for additional information.
1. Charge Cycle Time - The AD-SP
™
air dryer is designed
to provide clean, dry air for the brake system. When a
vehicle's air system is used to operate non-brake air
accessories it is necessary to determine that during
normal, daily operation the compressor should recover
from governor "cut-in" to governor "cut-out" (usually 100
psi to 120 psi) in 90 seconds or less at engine rpm's
commensurate with the vehicle vocation. Important
Note: The AD-SP
™
air dryer must be used in conjunction
