2019 RAM CHASSIS CAB maintenance

420 SERVICING AND MAINTENANCE
Engine Air Cleaner Filter
Refer to the “Maintenance Plan” in this section for the proper
maintenance intervals.
NOTE:
Be sure to follow the “Severe Duty Conditions” maintenance
interval if applicable.
Engine Air Cleaner Filter Selection
The quality of replacement engine air cleaner filters varies
considerably. Only high quality filters should be used to
assure most efficient service. Mopar engine air cleaner filters
are a high quality filter and are recommended. Engine Air Cleaner Filter Inspection And Replacement
Inspect engine air cleaner filter for dirt and or debris, if you
find evidence of either dirt or debris you should change your
air cleaner filter.
Engine Air Cleaner Filter Removal
1. With suitable tool fully loosen (six) fasteners on air
cleaner filter.
Air Cleaner FilterWARNING!
The air induction system (air cleaner, hoses, etc.) can
provide a measure of protection in the case of engine
backfire. Do not remove the air induction system (air
cleaner, hoses, etc.) unless such removal is necessary for
repair or maintenance. Make sure that no one is near the
engine compartment before starting the vehicle with the
air induction system (air cleaner, hoses, etc.) removed.
Failure to do so can result in serious personal injury.
1 — Fasteners
2 — Air Hose Clamp
3 — Air Cleaner Cover

SERVICING AND MAINTENANCE 421
2. Lift the air cleaner cover to access the air cleaner filter.
3. Remove the air cleaner filter element from the housing
assembly.
Open Air Cleaner Filter Assembly Engine Air Cleaner Filter Installation
NOTE:
Inspect and clean the housing if dirt or debris is present
before replacing the air filter element.
1. Install the air cleaner filter element into the housing
assembly with the air cleaner filter inspection surface
facing downward.
2. Install the air cleaner cover onto the housing assembly.
3. Tighten the fasteners (six) on the air cleaner filter
assembly
Air Conditioner Maintenance
For best possible performance, your air conditioner should
be checked and serviced by an authorized dealer at the start
of each warm season. This service should include cleaning of
the condenser fins and a performance test. Drive belt tension
should also be checked at this time.1 — Air Cleaner Cover
2 — Air Cleaner Filter
7

422 SERVICING AND MAINTENANCE
Refrigerant Recovery And Recycling R-134a — If
Equipped
R-134a Air Conditioning Refrigerant is a hydrofluorocarbon
(HFC) that is an ozone-friendly substance. The manufacturer
recommends that air conditioning service be performed by
an authorized dealer or other service facilities using recovery
and recycling equipment.
NOTE:
Use only manufacturer approved A/C system PAG
compressor oil and refrigerants.
Refrigerant Recovery And Recycling — R–1234yf
R–1234yf Air Conditioning Refrigerant is a hydrofluo -
roolefin (HFO) that is endorsed by the Environmental
Protection Agency and is an ozone-friendly substance with a
low global-warming potential. The manufacturer recom -
mends that air conditioning service be performed by an
authorized dealer using recovery and recycling equipment.
NOTE:
Use only manufacturer approved A/C system PAG
compressor oil, and refrigerants.WARNING!
• Use only refrigerants and compressor lubricants
approved by the manufacturer for your air condi -
tioning system. Some unapproved refrigerants are
flammable and can explode, injuring you. Other unap -
proved refrigerants or lubricants can cause the system
to fail, requiring costly repairs. Refer to Warranty Infor -
mation Book, for further warranty information.
• The air conditioning system contains refrigerant under
high pressure. To avoid risk of personal injury or
damage to the system, adding refrigerant or any repair
requiring lines to be disconnected should be done by
an experienced technician.
CAUTION!
Do not use chemical flushes in your air conditioning
system as the chemicals can damage your air
conditioning components. Such damage is not covered
by the New Vehicle Limited Warranty.

SERVICING AND MAINTENANCE 423
Cabin Filter Replacement (A/C Air Filter)
Refer to the “Maintenance Plan” for the proper maintenance
intervals.
The cabin air filter is located in the fresh air inlet behind the
glove compartment. Perform the following procedure to
replace the filter:
1. Open the glove compartment and remove all contents. 2. With the glove compartment door open, remove the
glove compartment tension tether and tether clip by
sliding the clip toward the face of the glove compartment
door. Lift the clip out of glove compartment door and
release into dash panel.
Right Side Of Glove CompartmentWARNING!
Do not remove the cabin air filter while the vehicle is
running, or while the ignition is in the ACC or ON/RUN
mode. With the cabin air filter removed and the blower
operating, the blower can contact hands and may propel
dirt and debris into your eyes, resulting in personal
injury.
1 — Glove Compartment Door
2 — Glove Compartment Tension Tether 7

424 SERVICING AND MAINTENANCE
3. There are travel stops on both sides of the glove compart -
ment. Push inward on right side of the glove compart -
ment travel stop to disengage the stop. Then pull the right
of the glove compartment outward (away from the hinge)
to disengaging the right side of the compartment from the
hinge. Continue by removing the left side from the hinge
by slightly lowering the compartment while pulling
outward until it is completely disengaged from the hinge.
Glove Compartment 4. Remove the filter cover by pushing in on the finger tabs
on each end of the filter cover.
Filter Cover
1 — Glove Compartment Travel Stop
2 — Glove Compartment Tension Tether
3 — Glove Compartment Door

SERVICING AND MAINTENANCE 425
Filter Cover Removal
5. Remove the cabin air filter by pulling it straight out of the
housing. Cabin Air Filter
6. Install the cabin air filter with the arrow on the filter
pointing toward the floor. When installing the filter
cover, press on each end until you hear an audible click.
7. Reinstall the glove compartment on the hinges.1 — Finger Tabs
CAUTION!
The cabin air filter is identified with an arrow to indicate
airflow direction through the filter. Failure to properly
install the filter will result in the need to replace it more
often. 7

426 SERVICING AND MAINTENANCE
8. Pull the tension tether outward and reinstall the glove
compartment past the travel stops by pushing in on the
glove compartment sides.
Right Side Of Glove Compartment
NOTE:
Ensure the glove compartment door hinges and glove
compartment travel stops are fully engaged. 9. Reattach the glove compartment tension tether by inserting
the tether clip in the glove compartment and sliding the clip
away from the face of the glove compartment door.
Accessory Drive Belt Inspection
1 — Glove Compartment Travel Stop
2 — Glove Compartment Tension Tether WARNING!
• Do not attempt to inspect an accessory drive belt with
vehicle running.
• When working near the radiator cooling fan, discon -
nect the fan motor lead. The fan is temperature
controlled and can start at any time regardless of igni -
tion mode. You could be injured by the moving fan
blades.
• You can be badly injured working on or around a motor
vehicle. Only do service work for which you have the
knowledge and the proper equipment. If you have any
doubt about your ability to perform a service job, take
your vehicle to a competent mechanic.

SERVICING AND MAINTENANCE 427
When inspecting accessory drive belts, small cracks that run
across ribbed surface of belt from rib to rib, are considered
normal. These are not a reason to replace belt. However,
cracks running along a rib (not across) are not normal. Any
belt with cracks running along a rib must be replaced. Also
have the belt replaced if it has excessive wear, frayed cords
or severe glazing.
Accessory Belt (Serpentine Belt) Conditions that would require replacement:
• Rib chunking (one or more ribs has separated from belt
body)
• Rib or belt wear
• Longitudinal belt cracking (cracks between two ribs)
• Belt slips
• “Groove jumping" (belt does not maintain correct position
on pulley)
• Belt broken (note: identify and correct problem before new
belt is installed)
• Noise (objectionable squeal, squeak, or rumble is heard or
felt while drive belt is in operation)
Some conditions can be caused by a faulty component such
as a belt pulley. Belt pulleys should be carefully inspected for
damage and proper alignment.
Belt replacement on some models requires the use of special
tools, we recommend having your vehicle serviced at an
authorized dealer. 7