Bendix Commercial Vehicle Systems AD-IS EVERFLOW - Manual (Page 8)

8
B. Thermostat and Heater Operation (Refer to Figure
5). Note: These tests can only be conducted during
cold weather operation. Turn off the ignition switch
and cool the thermostat and heater assembly to
below 40°F. Using an ohmmeter, check the resistance
between the electrical pins in the air dryer connector
half. The resistance should be 1.5 to 3.0 ohms for the
12 volt heater assembly and 6.0 to 9.0 ohms for the 24
volt heater assembly. Warm the thermostat and heater
assembly to approximately 90°F and again check the
resistance.
The resistance should exceed 1000 ohms. If the
resistance values obtained are within the stated limits,
the thermostat and heater assembly is operating
properly. If the resistance values obtained are outside
the stated limits, replace the heater and thermostat
assembly.
REBUILDING THE BENDIX ® AD-IS ® AIR DRYER
DO NOT ATTEMPT TO ADJUST OR SERVICE THE
PRESSURE PROTECTION VALVES. INCORRECT
PRESSURE PROTECTION VALVE SETTINGS CAN
RESULT IN THE AUTOMATIC APPLICATION OF
THE VEHICLE SPRING BRAKES WITHOUT PRIOR
WARNING.
MAINTENANCE KITS
See the proper Bendix Service Data Sheet or
Quick Reference Catalog (BW1114) for a full list of
maintenance kits available.
Note: Kits are not available for the servicing of the pressure
protection valves (See Figure 6). Do not attempt to adjust
or service the pressure protection valves — these are not
service items.
GENERAL
When rebuilding or replacing components of the air dryer,
use only genuine Bendix ® parts. For ease in servicing,
the AD-IS air dryer has been designed so that any of the
maintenance kits shown in this manual can be installed
without removing the air dryer from the vehicle.
Always depressurize the air dryer purge reservoir, and all
other reservoirs on the vehicle to 0 psi before servicing
the air dryer.
If, after completing the routine operation and leakage tests,
it has been determined that one or more components of
the air dryer requires replacement or maintenance, refer
to the previous list to find the appropriate kit(s).
FIGURE 5 - AD-IS ® AIR DRYER HEATER AND
THERMOSTAT CONNECTOR
HEATER & THERMOSTAT
CONNECTOR
Maintenance Kits
Kit Description Piece No.
Delivery Check Valve Replacement Kit 5004052
Desiccant Cartridge Replacement Kit (Standard) 5008414
Desiccant Cartridge Replacement Kit - Bendix ® AD-IS ®
PuraGuard ® air dryer (can be used to replace the standard
cartridge)
5008414PG
Drain Valve 5004961N
Governor and Check Valve Replacement Kit 5004049
Governor Gasket 5007834
Heater & Thermostat Replacement (12 volt) 109495
Heater & Thermostat Replacement (24 volt) 109496
Bendix ® PuraGuard ® Oil Coalescing Desiccant Cartridge
Service New Kit
K020366
Mounting Bolt Kit 5009233
Protective Boots (for pressure protection valves) 5005163
Safety Valve 800350
Splash Shield Kit (includes bracket and cover) 5006698
Splash Shield Cover 5005266N
Silencer Kit K021189
Wiring Harness & Splice Kit 109871N
Purge Valve Assembly Type Configuration
Service Kit
Pc. No.
Purge Valve Assembly for
climate conditions above
-40°C (-40°F)
Bendix ® AD-IS ® Air Dryer K022105
AD-IS ® EverFlow ®
Module
K031560
AD-IS ® Discharge Line
Unloader
K031562
Arctic Purge Valve Assembly
for climate conditions of
-40°C to -50°C
(-40°F to -58°F)
AD-IS ® Air Dryer K031559
AD-IS ® EverFlow ®
Module
K031561
AD-IS ® Discharge Line
Unloader
K031563