Barrier Type Hose & Fittings; Evaporator Hose Routing-Inside The Bus Wall; Figure 4--4 Quick--Click #4; Figure 4--5 Quick-Click Hose (Capped) - Carrier Transport Air Conditioning Installation Procedures Manual

4. Lubricate the fitting O--Rings with mineral oil. Push
the fitting into the hose until it contacts the fitting
clamp stop angle (See Figure 4--3).
Hose
Fitting
Figure 4- -4 Quick- -Click #4
5. Using the pliers supplied in the Installation Kit, clip
the fitting clamp lugs tightly together. You will hear a
"click" when the lugs snap together. The lugs can be
unclipped by reversing the pliers action (See
Figure 4--4).
NOTE
There will be times when the hose is cold and
stiff, making it difficult to expand and insert a fit-
ting. In this event there is a fitting insertion tool
(CTAC P/N 07--00417--00) available to aid in
the installation.
4.2.2 Barrier Type Hose & Fittings
(Not Recommended By Carrier TAC)
The setup, operation and equipment maintenance are
all critical when using this type hose & fittings. Failure to
crimp properly will result in immediate leaks or leaks that
become evident due to heat and vibration. When using
beadlock type fittings it is critical to have initial
interference between the hose inside diameter and
fitting tube outside diameter. Use of a combination that
has clearance between components will result in a
much higher probability of leaks.
4.3 EVAPORATOR HOSE ROUTING-INSIDE THE
BUS WALL
Always keep hose capped until ready to connect to a
system component (see Figure 4--5).
T--311
Pliers
Clamp
4--2
Figure 4- -5 Quick-Click Hose (Capped)
Cutaway bus hose routing will normally be routed
through the bus floor, up the lower wall (see Figure 4--6),
and then behind the upper off-set rear wall. This type of
routing must be accomplished before the evaporator is
mounted to the bus ceiling. On some buses the hose,
harness, and drain lines can be routed (hidden) behind
the lower wall also.
Figure 4- -6 Bus With Rear Seat Removed
1. Determine which side of the vehicle the hoses
should be routed; the drivers side or passenger side.
2. Determine what route the hoses will take. Take into
consideration there are going to be obstacles that
the hoses may have to be routed around, such as
seats, wheelchair lifts, windows, etc.
3. Lay out the hose cover backs in the position that they
eventually will be installed, and mark their position
(see Figure 4--7). Mark the sides and where they
stop at the floor and wall. This will give you an outline
where the holes for the hoses should be placed.