Dodge RAM 1500 1998 Owner's Manual page 2538

DR
A/C COMPRESSOR (Continued)
INSTALLATION
NOTE: If a replacement compressor is being
installed, be certain to check the refrigerant oil
level. See Refrigerant Oil Level in this group for the
procedures. Use only refrigerant oil of the type rec-
ommended for the compressor in the vehicle.
(1) Install the compressor onto the mounting
bracket.
(2) On the 3.7L and 4.7L engines, install and
tighten the bolts in the following sequence (Fig. 7):
• Install the inner front bolt #3 and hand tight-
ened.
• Install the outer front bolt #2 and hand tight-
ened.
• Install the rear bolt #1 and hand tightened.
• Tightened the inner front bolt #3 to 40 N·m (30
ft. lbs.).
• Tightened the outer front bolt #2 to 55 N·m (41
ft. lbs.).
• Tightened the rear bolt #1 to 55 N·m (41 ft. lbs.).
Fig. 7 A/C Compressor - 3.7L Shown, 4.7L Typical
1 - BOLT #1
2 - BOLT #2
3 - BOLT #3
4 - A/C COMPRESSOR
5 - A/C CLUTCH AND PULLEY
6 - MOUNTING BRACKET
(3) For the 5.7L Hemi engine, install and tighten
the bolts in the following sequence (Fig. 8):
• Install the two long bolts into the mounting
bracket and hand tightened.
• Install the rear bolt and hand tightened.
• Tightened the two long bolts to 40 N·m (30 ft.
lbs.).
• Tightened the rear bolt to 55 N·m (41 ft. lbs.).
(4) For the 5.7L Hemi engine, install the generator
and A/C compressor support bracket and retaining
nuts and bolts. Tighten the nuts and bolts securely.
Fig. 8 A/C Compressor - 5.7L Hemi
1 - BOLT (2)
2 - A/C COMPRESSOR
3 - BOLT
4 - MOUNTING BRACKET
(5) For the 5.9L diesel engine, install and tighten
the bolts in the following sequence (Fig. 9):
• Install the four bolts into the mounting bracket
and hand tightened.
• Tightened the four bolts to 24 N·m (17 ft. lbs.).
(6) Remove the tape or plugs from the opened
refrigerant line fittings and compressor ports.
(7) Lubricate new rubber O-ring seals with clean
refrigerant oil and install them on the suction and
discharge line fittings. Use only the specified O-rings
as they are made of a special material for the R-134a
system. Use only refrigerant oil of the type recom-
mended for the A/C compressor in the vehicle.
(8) Install the suction and discharge line fittings
onto the compressor.
(9) Install the bolt or nuts (depending on engine
application) that secure the suction and discharge
line fittings to the compressor. Tighten the bolt or
nuts to 28 N·m (20 ft. lbs.).
(10) Connect the wire harness connector to the
compressor clutch coil.
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