adding oil DODGE RAM 1999 Service Repair Manual

With Rear Unit ..................... 10.0 ............... 46.0
Ford Motor Co.
"E" Series
With Rear Unit ..................... 13.0 ............... 64.0
Without Rear Unit ................... 9.0 ............... 44.0
Expedition & Navigator ................ (2) ................ ( 2)
Explorer & Mountaineer ................ 7.0 ............... 30.0
F150/F250 Pickup ...................... 9.0 ............... 32.0
F250HD/F350 Pickup .................... 9.0 ............... 32.0
Ranger ................................ 7.0 ............... 30.0
Villager
With Rear Unit ..................... 11.0 ............... 56.0
Without Rear Unit ................... 7.0 ............... 32.0
Windstar
With Rear Unit ..................... 13.0 ............... 56.0
Without Rear Unit ................... 9.0 ............... 44.0
General Motors
"C" & "K" Series
Pickup & Sierra ..................... 8.0 ............... 32.0
Crew Cab & Utility .................. 8.0 ............... 36.0
Suburban, Tahoe & Yukon
With Rear Unit ..................... 11.0 ............... 64.0
Without Rear Unit ................... 8.0 ............... 36.0
"G" Series
With Rear Unit ..................... 11.0 ............... 78.0
Without Rear Unit ................... 8.0 ............... 48.0
"J" Series ............................ 3.4 ............... 21.0
"L" & "M" Series
With Rear Unit ..................... 11.0 ............... 48.0
Without Rear Unit ................... 8.0 ............... 32.0
"P" Series ............................ 8.0 ................ ( 2)
"S" & "T" Series
2.2L ................................ 9.0 .......... 30.0-32.0
4.3L ................................ 8.0 .......... 30.0-32.0
"U" Series
With Rear Unit ..................... 11.0 ............... 46.0
Without Rear Unit ................... 8.0 ............... 32.0
Jeep
Cherokee .............................. 8.1 ............... 20.0
Grand Cherokee ........................ 5.8 ............... 24.0
Wrangler .............................. 8.1 ............... 20.0
( 1) - Total system capacity, unless otherwise noted. Refer to
underhood A/C specification label in engine compartment for
specified oil type.
( 2) - Refrigerant oil and/or refrigerant capacity not available from
manufacturer. Refer to underhood A/C specification label in
engine compartment.









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REFRIGERANT OILS
* PLEASE READ THIS FIRST *
NOTE: Use ONLY the specified oil for the A/C system or compressor.
Always check the underhood A/C specification label or A/C
compressor label before adding refrigerant oil to A/C
compressor/system.
NOTE: For compressor applications, see COMPRESSOR APPLICATIONS &
BODY DESIGNATIONS. DO NOT exceed A/C system refrigerant oil
capacity when servicing system. See CAPACITIES.

Use only NEW, moisture-free refrigerant oil in A/C systems.
Refrigerant oil is highly refined with a very low moisture content.
Oil container must be tightly closed when not in use, or moisture from
air will be absorbed into refrigerant oil.
Refrigerant R-134a systems use Polyalkylene Glycol (PAG)
refrigerant oil. Using a mineral oil based lubricant with R-134a
systems will result in A/C compressor failure due to lack of proper
lubrication.
All compressors have different lubrication requirements and
use different Polyalkylene Glycol (PAG) refrigerant oils. Use only the\
specified PAG refrigerant oil for the appropriate system and A/C
compressor. Always check the underhood A/C specification label or A/C
compressor label before adding refrigerant oil to A/C
compressor/system. See listing of refrigerant oils currently available
from the vehicle manufacturers.
NOTE: PAG oil absorbs moisture very rapidly, 2.3-5.6 percent by
weight as compared to a mineral oil absorption rate of .005
percent by weight.
CHRYSLER CORP., JEEP & EAGLE
Use ND-8 PAG oil, SUN PAG 56 oil, SP-10 PAG oil, or SP-20 PAG
oil.
FORD MOTOR CO.
Use YN-12B or YN-12C PAG Refrigerant Oil (specification WSH-
M1C231-B) or SP-20 PAG Oil (specification WST-M1C231-B2).
GENERAL MOTORS
On all models except Saturn, use PAG Refrigerant Oil (Part
No. 12345923). On Saturn, use Saturn PAG refrigerant oil.
SERVICING PRECAUTIONS
DISCHARGING SYSTEM
Discharge A/C system, using approved refrigerant
recovery/recycling equipment before loosening any fittings. Follow
refrigerant recovery/recycling equipment manufacturer's instructions.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all
fittings to be opened. Always use 2 wrenches when loosening or
tightening fittings. Some refrigerant lines are connected with a
spring-lock coupling. Special tools may be required to disconnect
lines. To prevent dirt and moisture from entering system, cap all
openings as soon as lines are removed. DO NOT remove service valve
caps until ready to connect lines and fittings.
NOTE: All R-134a based systems use 1/2-16 ACME threaded fittings.
Ensure all replacement parts match the connections of the
system being worked on.
CONNECTING LINES & FITTINGS
Always use new a gasket or "O" rings when connecting lines or

Refrigerant R-12 based systems use mineral oil, while R-134a
systems use synthetic Polyalkylene Glycol (PAG) oils. Using a mineral
oil based lubricant with R-134a will result in A/C compressor failure
due to lack of proper lubrication.
Following are the most common R-134a refrigerant oils used by
most domestic vehicles:
Chrysler Corp., Eagle & Jeep
Use ND-8 PAG oil, SUN PAG 56 oil, SP-10 PAG Oil, or SP-20 PAG
oil.
Ford Motor Co.
Use YN-12B or YN-12C PAG Refrigerant Oil (specification WSH-
M1C231-B) or SP-20 PAG Oil (specification WST-M1C231-B2).
General Motors
On all models except Saturn, use PAG Refrigerant Oil (Part
No. 12345923). On Saturn, use Saturn PAG refrigerant oil.
NOTE: PAG oil absorbs moisture very rapidly, 2.3-5.6 percent by
weight as compared to a mineral oil absorption rate of .005
percent by weight.
NOTE: Use ONLY the specified oil for the appropriate system or A/C
compressor. Always check the underhood A/C specification
label or A/C compressor label before adding refrigerant oil
to A/C system.
SYSTEM SERVICE VALVES
SCHRADER-TYPE VALVES
NOTE: Although similar in construction and operation to a tire
valve, NEVER replace a Schrader-type valve with a tire
valve.
Schrader valve is similar in construction and operation to a
tire valve. See Fig. 4. When a test gauge hose is attached (hose has
built-in valve core depressor), Schrader stem is pushed inward to the
open position and allows system pressure to reach the gauge.
If test hose being used does not have a built-in core
depressor, an adapter must be used. Never attach hoses or adapters to
a Schrader valve unless it is first connected to manifold gauge set.
Fig. 4: Schrader Service Valve (Compressor Location Shown)
SPECIAL VALVE CONNECTORS
On some General Motors models, thread size on high-side

4) Scan tool will automatically calculate system charge.
Depending on system charge condition, corrections are made 2 ounces at
a time. Each time a correction is made, recheck readings to ensure
proper charge. For system refrigerant capacity, see REFRIGERANT OIL &
REFRIGERANT SPECIFICATIONS article.
Breeze, Cirrus, Concorde, Intrepid, LHS, Stratus & 300M
(Manifold Gauge Set Method)
1) Attach clamp-on Thermocouple (80PK-1A) to liquid line, as\
close to condenser outlet as possible. Attach manifold gauge set to
vehicle.
2) Set parking brake, and place transaxle in Park position.
Start engine and allow to idle. Set A/C controls to outside air, panel
mode, full cool, and high blower speed. Turn A/C on, and open windows.
Operate system for a few minutes to allow system to stabilize.
3) Place cardboard over front grille area, to block airflow
through part of condenser, to set A/C pressure to 260 psi (18.3
kg/cm
). This will stop cooling fans from alternating speeds and
maintain constant pressure.
4) Record temperature reading at liquid line and discharge
pressure reading on gauges. Compare readings with values in
REFRIGERANT CHARGE LEVEL table.
5) Depending on system charge condition, corrections are made
2 ounces at a time. Each time a correction is made, recheck readings
to ensure proper charge. For system refrigerant capacity, see
REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS article.
REFRIGERANT CHARGE LEVEL









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Liquid Line Temp. ( 1) Discharge PressureF (C) psi (kg/cm)
40 (4.4) ........................................... 53-75 (3.7-5.3\
)
60 (15.6) ......................................... 81-104 (5.7-7.3\
)
80 (26.7) ....................................... 111-142 (7.8-10.0\
)
100 (37.8) ..................................... 156-194 (11.0-13.6\
)
120 (48.9) ..................................... 208-259 (14.6-18.2\
)
140 (60.0) ..................................... 272-331 (19.1-23.3\
)
160 (71.1) ..................................... 353-420 (24.8-29.5\
)
180 (82.2) ..................................... 447-516 (31.4-36.3\
)
( 1) - When pressure is lower than specified, system is undercharged.
When pressure is higher than specified, system is overcharged.









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All Other Models
Ensure A/C system has been checked for leaks and evacuated.
See EVACUATING A/C SYSTEM and LEAK TESTING. Charge A/C system to
specifications. For system refrigerant capacity, see REFRIGERANT OIL &
REFRIGERANT SPECIFICATIONS article.
FORD MOTOR CO.
1) If using approved Recovery/Recycling/Charging Center (023-\
00105 or 023-00150), connect to high-side and low-side service valves.
See SERVICE VALVE LOCATIONS under SYSTEM SERVICE VALVES. Operate
charging center according to manufacturer's instructions. Charge
system with specified amount of refrigerant and refrigerant oil. See
REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS article. Check amount of
refrigerant oil in system before adding oil. See COMPRESSOR
REFRIGERANT OIL CHECKING article.
2) If using manifold gauge set, connect to high-side and low-
side service valves. See SERVICE VALVE LOCATIONS under SYSTEM SERVICE

distorting yoke, DO NOT overtighten vise jaws.
Disassembly
1) Clamp front drive shaft in a soft-jaw vise. If required,
disassemble "U" joint from yoke to access yoke-to-drive shaft
retaining bolt. Scribe mark yoke or slip joint to drive shaft for
reassembly reference. Slide yoke or slip joint off shaft splines.
2) Remove and retain center bearing support bracket and
retainer. (Service replacement assembly may not come with these items.
) Remove rubber insulator from bearing housing. See Fig. 10.
3) Bend slinger away from center bearing to provide clearance
for bearing puller. Using bearing puller, remove center bearing from
drive shaft. On some applications, outer bearing cover/cage and balls
must be removed to attach puller to bearing race.
Reassembly & Installation
Install NEW slinger to shaft. Install/press bearing onto
shaft using appropriate tool or tube until bearing is seated to shaft
shoulder. To complete installation, reverse disassembly and removal
procedures. Ensure support bracket angle adjustment shims are
reinstalled (if removed).
OVERHAUL
NOTE: Manufacturer recommends replacing "U" joint(s) whenever "U"
joint is disassembled from yoke. ALWAYS replace complete "U"
joint whenever extreme external lubrication leakage or
bearing cap damage exists.
Before disassembly, mark flange/yoke to drive shaft for
reassembly reference, and remove "U" joint lube fitting(s). If joints
are rusted or corroded, apply penetrating oil before pressing bearing
caps out of yoke or off "U" joint trunnion pin.
SINGLE CARDAN "U" JOINTS
Other than adding grease, "U" joint assembly items are not
individually serviceable or repairable. If needle bearings, seals,
spider, or bearing caps are found to be defective, damaged or
excessively worn, complete "U" joint must be replaced.
NOTE: Saturate bearing caps and yokes with penetrating oil before
removal.
Removal
Raise and support vehicle. Remove drive shaft. Remove inner
or outer type bearing cap retainer clips. See Fig. 11. Press bearing
caps from yokes. Remove bearings, seals and spider from yoke bore, and
discard.
Cleaning
Clean yoke bores using solvent and wire brush or crocus
cloth. Remove rust, corrosion and foreign matter from yoke bores.
Installation
1) Apply multipurpose lubricant (NLGI grade 2 EP) to yoke
bores and into needle bearings of each bearing cap. Position spider in
yoke bores.
2) Install seals onto spider trunnions or bearing caps.
Lightly tap bearing caps into yoke bore far enough to retain spider in
place.