6
CONNECTING THE AIR HOSES
Follow either Figure 4 or 5 for air hose arrangement.
1. The
PuraGuard
®
system filter supply and delivery ports
are 1/2-14 NPT. Install minimum 1/2 inch inside diameter
air hoses. When installing an elbow fitting use the fitting
arrangement shown in Figure 9, using a high strength
nipple and then an elbow fitting.
2. Hoses must be installed without tight turns that might
cause air flow restrictions. Note: Check that the hose
attachment agrees with the air flow arrow symbol (see
Figure 1). The label may not be facing forward when
installation is complete.
OPERATIONAL TEST
Build the air system to governor cutout. Shut off the engine.
Using a soap solution, check all hoses and fittings leading
to and from the
PuraGuard
®
system filter for leakage and
integrity. Repair any excessive leaks - exceeding a 1”
bubble in 5 seconds - before restoring vehicle to service.
MAINTENANCE KIT INSTALLATION
KIT DESCRIPTION
The kits available allow either a filter element replacement
or major overhaul of the Bendix
®
PuraGuard
®
system filter.
VEHICLE PREPARATION
1. Park the vehicle on a level surface and prevent movement
by means other than the brakes.
2. Drain all reservoirs to 0 p.s.i.
3. Drain the contents of the sump into a suitable container
for disposal and then re-close the drain valve.
4. Using detergent and water, clean the exterior of the
PuraGuard
®
system filter of road grime etc.
DISASSEMBLY AND CLEANING
(see Figure 11)
1. Unscrew the sump housing of the
PuraGuard
®
system
filter. If necessary, use a strap wrench to assist this
process.
2. Remove and discard the filter and o-ring.
If only installing the maintenance kit, go to
Inspection
section below.
3. Using long-nose pliers, carefully remove and discard
the spring and spring locator inside the sump housing.
4. Using detergent and water or other suitable solvent, clean
inside the sump housing.
INSPECTION
1. Inspect the
PuraGuard
®
system filter for broken or
missing parts. Replace as necessary.
2. Inspect the drain valve for any build-up that could impair
its function. Clean as necessary.
ASSEMBLY
(see Figure 11)
1. Install the replacement o-ring into the channel in the
head of the
PuraGuard
®
system filter.
FIGURE 11 -
MAINTENANCE KIT COMPONENTS
FILTER
ELEMENT
LARGE
O-RING
SPRING
SPRING
LOCATOR
PURAGUARD
®
SYSTEM FILTER
HEAD
SUMP
HOUSING
If only installing the maintenance kit, go to item 4 below.
2. Install the spring onto the spring locator.
3. Using long-nose pliers, install the spring locator and
spring assembly into the sump (see Figure 11).
4. Insert the replacement filter (guide lands uppermost)
into the sump with its base resting on the spring.
5. Coat the threads of the sump housing using barium or
lithium grease. Sufficient torque to install the sump will
be produced by turning the housing by hand until fully
hand-tight. Take care not to damage the large
o-ring when installing the sump housing.
