TK 56433-5-MM-EN
81
4. Install the four screws and torque them to 4.4 ± 0.4
ft-lb (6.0 ± 0.5 N•m).
5. Connect the main/unified wire harness to the ETV at
the four-pin connector.
6.
Pressurize the low side and test for leaks.
7.
If no leaks are found, evacuate the low side.
8.
Open the refrigeration valves and place the unit in
operation.
Installation of Complete ETV Assembly
1.
Clean the tubes for soldering.
2.
Place the new complete ETV assembly (and any
tubes that were removed) in the same position from
which the old one was removed. The new ETV
could interfere with other components if it is not
placed in the same position as the old one. The ETV
assembly must be installed as shown below relative
to the direction of refrigerant flow from the
accumulator to the compressor.
N
No
otte
e:: Do not disassemble the new ETV to solder it
in place.
Figure 102.
Installing Complete ETV Assembly
1.
Use Heat Sink
2.
Direction of Refrigerant Flow
3.
Use a heat sink or wrap the valve body with a wet
rag to prevent damage and solder the tubing
connections with 95-5 soft solder.
4.
Connect the main/unified wire harness to the ETV
at the four-pin connector.
5.
Pressurize the low side and test for leaks.
6.
If no leaks are found, evacuate the low side.
7.
Install the components that were removed to
access the ETV.
8.
Open the refrigeration valves and place the unit in
operation.
Hot Gas Bypass Valve
Removal
1.
Recover the refrigerant charge.
2.
Disconnect the wires and remove the coil for the
valve.
3.
Unsolder the refrigeration lines.
4.
Remove the mounting bolts and remove the valve.
Installation
1.
Clean the tubes for soldering.
2.
Remove the coil from the valve.
3.
Place the valve in the unit and install the mounting
bolts. The arrow on the valve indicates the direction
of flow through the valve. Verify that the arrow
points in the proper direction.
4.
Solder the inlet and outlet connections. After the
valve cools, install the coil.
5.
Pressurize the refrigeration system and test for
leaks.
6.
If no leaks are found, evacuate the system.
7.
Recharge the unit with proper refrigerant and
check the compressor oil.
Compressors with Internal Oil
Filter
In the first quarter of 2014, four cylinder compressors
with an internal oil filter are being phased into truck
and trailer units that typically use compressors with
external oil filters. The internal oil filter is located in the
compressor sump near the oil pickup tube (
).
N
No
otte
e:: These units use compressors with oil filters. If
the compressor does not have an external oil
filter, it has an internal oil filter.
Internal Oil Filter Replacement
The internal oil filter should be replaced in the same
situations in which the external oil filter was replaced,
such as when the drier is replaced or the compressor
oil is changed.
