Bendix Commercial Vehicle Systems AD-2 AIR DRYERS 7/04 - Manual (Page 8)

8
DISASSEMBLY OF DESICCANT CARTRIDGE
1. Carefully remove and discard the lock nut on top of the
desiccant sealing plate. (The plate is spring loaded; see
“Caution” note in “Removal of Desiccant Cartridge”
section.)
2. Remove the desiccant sealing plate and rebuild it as
outlined under the Removing and Rebuilding the
Desiccant Sealing Plate section of this manual.
3. Remove and retain the spring, spring seat, bolt, and
cartridge shell. Discard the oil separator filter, the two
perforated plates and desiccant material.
FIGURE 9
FIGURE 10
FIGURE 8 - ASSEMBLY OF DESICCANT CARTRIDGE
REINSTALLING THE DESICCANT CARTRIDGE
AD-1
™ AND AD-2 ™ AIR DRYER
If the desiccant cartridge is to be replaced as an assembly
rather than rebuilt (see desiccant cartridge rebuilding
instructions), the cartridge removed from the air dryer.
The current revision replacement desiccant cartridge is
shown in Figure 7. All prior revisions of the cartridge will
interchange with no modifications to either air dryer.
Prior to installing the new replacement cartridge in the air
dryer, the following steps must be followed:
1. Carefully remove the lock nut from the cartridge bolt
using an 11/16 in. open end or box wrench. IMPORTANT:
Care must be taken not to allow the cartridge bolt to slip
out of the cartridge when the lock nut is removed. Loss
of desiccant material will occur should this happen.
2. Install the previously rebuilt desiccant sealing plate on
the cartridge bolt so that the ball check retaining clip
remains visible (see Figure 15-1 & 15-2).
3. While holding the cartridge bolt reinstall the lock nut on
the cartridge bolt. IMPORTANT: Before tightening the
lock nut down make certain that the shoulder (the
unthreaded portion) of the cartridge bolt extends slightly
above the perforated desiccant plate (see Figure 12).
4. By tightening the lock nut, draw the desiccant sealing
plate down into the desiccant cartridge until the shoulder
of the desiccant sealing plate is against the cartridge
shell. (See Figure 15)
REBUILDING THE DESICCANT CARTRIDGE
IMPORTANT: Only the current revision desiccant cartridges
(See Figure 7) can be rebuilt. Current revision desiccant
cartridges are identified positively by the Bendix trademark
BW stamped in the hex head of the cartridge bolt, and by
the letters and number AD-2
™ air dryer displayed on the
bottom face of the oil filter. If an old revision desiccant
cartridge is removed from the air dryer, it should be
replaced with a complete current revision desiccant
cartridge.