BENDIX SD-08-2418, Manual

Page: 10 / 16

10
ROADSIDE INSPECTION
In the event of a roadside inspection the system behavior
will be as follows: When the system is charged to
governor cut-out and then one reservoir drain valve is
opened, initially both reservoir gauges will fall; however,
the Bendix
®
AD-IS
®
air dryer primary and secondary
pressure protection valves will close at pressures above
70 psi, protecting the remaining brake circuit from further
loss of pressure.
TEMPORARY AIR DRYER & RESERVOIR SYSTEM
BYPASS
To temporarily bypass the air dryer, follow these procedures:
Adhere to the General Safety Guidelines outlined
elsewhere in this document.
Make sure that all residual pressure has been released and
the air dryer purge reservoir has been drained to 0 psi,
then remove the air supply line from the compressor to the
inlet port (1/IN). Remove the safety valve from the Bendix
AD-IS air dryer ( see Figure 1 for location ). Note that a short
puff of trapped air may vent from the safety valve port when
removing the valve. Install a T-fitting into the port. Using
any adapters necessary, reinstall the safety valve in one of
the branches of the T-fitting. Using any adapters necessary,
install the air supply line into the remaining T-fitting port.
After testing the T-fitting for any air leakage – by using a
soap solution after charging to system cut-out pressure (a
1” bubble in 10 seconds is acceptable) – the vehicle may
be returned to temporary service.
Note: This is a temporary bypass of the air dryer. Full
repair of the unit must be carried out at the earliest
opportunity.
With the air dryer removed from the system, contaminants
will be entering the air brake system: reservoirs will need to
be manually drained daily until the repairs are completed.
At the end of each working day, park the vehicle and slowly
drain pressure through the drain valves – leave open to
the atmosphere – for several hours, if possible. When
repairs are carried out, be sure to check that all reservoirs
(including the air dryer purge reservoir) are emptied of all
contaminants.
If, after bypassing the air dryer & reservoir system, the
system pressure still does not build, use the following
procedure to remove, clean, and reinstall the delivery
check valve.
DELIVERY CHECK VALVE CLEANING PROCEDURE
( Note: This is only required if system pressure does not
build after temporary bypass is comple ted.)
Refer to Figure 6 throughout the following procedures.
Depressurize the air brake system following the General
Safety Guidelines outlined elsewhere in this document.
Also, always depressurize the air dryer purge reservoir
before servicing the air dryer.
This procedure does not require removal of the Bendix
AD-IS air dryer & reservoir from the vehicle.
1. Remove the line from the governor and mark for easy
reinstallation.
2. Remove the bolts attaching the governor to the AD-IS
air dryer & reservoir system and retain for reassembly.
3. Remove the governor from the air dryer. Be aware that
a short puff of trapped air may vent when the governor is
removed. Retain the governor gasket for reassembly if
a new governor gasket is not available. Remove and
retain the o-ring from the adapter.
4. The spring / delivery check valve can now be removed.
5. Remove and retain the o-ring from the check valve
body.
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) K052469
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