SEAT CUSHION / COVER -
FRONT
REMOVAL
(1) Remove the front seat. (Refer to 23 - BODY/
SEATS/SEAT - FRONT - REMOVAL)
(2) Remove the screw and remove the recliner han-
dle.
(3) Remove the two screws and remove the power
seat controls, if equipped, and disconnect the electri-
cal connector.
(4) Remove the seat track. (Refer to 23 - BODY/
SEATS/SEAT TRACK - REMOVAL)
(5) Disconnect the j-straps and remove the seat
cushion and cover.
INSTALLATION
(1) Position the seat cushion and cover onto the
frame assembly and connect the j-straps.
(2) Install the seat track. (Refer to 23 - BODY/
SEATS/SEAT TRACK - INSTALLATION)
(3) Connect the power seat control switch electrical
connector, if equipped.
(4) Install the power seat control switch and
install the two screws, if equipped.
(5) Install the recliner handle and install the
screw.
(6) Install the front seat. (Refer to 23 - BODY/
SEATS/SEAT - FRONT - INSTALLATION)
SEAT TRACK
REMOVAL
(1) Remove the front seat. (Refer to 23 - BODY/
SEATS/SEAT - FRONT - REMOVAL)
(2) Disconnect the heated seat electrical connec-
tors, if equipped.
(3) Remove the four nuts attaching the seat track
to the seat and remove the track.
INSTALLATION
(1) Position the seat track onto the seat and install
the four nuts.
(2) Tighten the four nuts to 25 N´m (18 ft. lbs.).
(3) Connect the heated seat electrical connectors, if
equipped.
(4) Install the seat. (Refer to 23 - BODY/SEATS/
SEAT - FRONT - INSTALLATION)
SEAT - REAR
REMOVAL
(1) Remove the load floor. (Refer to 23 - BODY/IN-
TERIOR/LOAD FLOOR - REMOVAL)
(2) Fold the rear seat cushions up and remove the
rear bolts. (Fig. 17)
(3) Lift each seat assembly up and disengage the
seat back frame hooks from the footmans loops bolted
to the rear cab back. (Fig. 18)
(4) Remove the seats from the vehicle.
INSTALLATION
(1) Install the seats into the vehicle and engage
the seat back frame hooks with the footmans loops in
the cab back panel.
(2) Install the rear seat bolts and tighten to 40
N´m (30 ft. lbs.).
(3) Install the load floor. (Refer to 23 - BODY/IN-
TERIOR/LOAD FLOOR - INSTALLATION)
SEAT BACK - REAR
REMOVAL
(1) Remove the rear seat. (Refer to 23 - BODY/
SEATS/SEAT - REAR - REMOVAL)
(2) Remove the seat back bolts and remove the
seat back. (Fig. 19)
INSTALLATION
(1) Install the seat back and install the bolts.
(2) Tighten the bolts to 25 N´m (18 ft. lbs.).
Fig. 17 SEAT ATTACHMENT
1 - OUTER BOLTS (2)
2 - REAR SEAT ASSEMBLY
3 - INNER BOLTS (4)
4 - REAR SEAT BACK
5 - OUTER BOLTS (2)
DRSEATS 23 - 83
(3) Install the rear seat. (Refer to 23 - BODY/
SEATS/SEAT - REAR - INSTALLATION)
SEAT BACK CUSHION / COVER
- REAR
REMOVAL
(1) Remove the rear seat back. (Refer to 23 -
BODY/SEATS/SEAT BACK - REAR - REMOVAL)
(2) Remove the headrest sleeves. (Refer to 23 -
BODY/SEATS/HEADREST SLEEVE - REMOVAL)
(3) Unzip the zip strip at the bottom of the seat
back and remove the cover.
INSTALLATION
(1) Install the seat back cover and connect the zip
strip.
(2) Install the headrest sleeves. (Refer to 23 -
BODY/SEATS/HEADREST SLEEVE - INSTALLA-
TION)
(3) Install the seat back. (Refer to 23 - BODY/
SEATS/SEAT BACK - REAR - INSTALLATION)
SEAT CUSHION / COVER -
REAR
REMOVAL
(1) Remove the rear seat. (Refer to 23 - BODY/
SEATS/SEAT - REAR - REMOVAL)
(2) Separate the zip strip at the rear of the seat
cushion and remove the cushion and cover.
INSTALLATION
(1) Install the seat cushion and cover over the
cushion frame assembly and connect the zip strip.
(2) Install the seat. (Refer to 23 - BODY/SEATS/
SEAT - REAR - INSTALLATION)
Fig. 18 SEAT BACK ATTACHMENT
1 - OUTER SEAT BACK FRAME HOOKS (2)
2 - OUTER FOOTMANS LOOP (2)
3 - INNER SEAT BACK FRAME HOOKS (2)
4 - INNER FOOTMANS LOOP (2)
5 - SEAT BACK
Fig. 19 REAR SEAT HINGE
1 - SEAT BACK BOLT (2)
2 - SEAT CUSHION
3 - SEAT BACK/CUSHION HINGE
4 - SEAT BACK
23 - 84 SEATSDR
SEAT BACK - REAR (Continued)
SEAT CUSHION FRAME - REAR
REMOVAL
(1) Remove the seat cushion/cover. (Refer to 23 -
BODY/SEATS/SEAT CUSHION / COVER - REAR -
REMOVAL)
(2) Remove the bolts and remove the seat cushion
frame. (Fig. 20)
INSTALLATION
(1) Install the seat cushion frame onto the rear
seat hinges.
(2) Install the bolts and tighten to 32 N´m (24 ft.
lbs.).
(3) Install the seat cushion/cover. (Refer to 23 -
BODY/SEATS/SEAT CUSHION / COVER - REAR -
INSTALLATION)
SEAT BACK REAR -
FOOTMANS LOOP BRACKETS
REMOVAL
(1) Remove the rear seat. (Refer to 23 - BODY/
SEATS/SEAT - REAR - REMOVAL)
(2) Remove bolts and remove the loop. (Fig. 21)
INSTALLATION
(1) Install the loop and install the bolts.
(2) Tighten the bolts to 12 N´m (9 ft. lbs.).
(3) Install the seat. (Refer to 23 - BODY/SEATS/
SEAT - REAR - INSTALLATION)
Fig. 20 SEAT CUSHION FRAME ATTACHMENT
1 - REAR SEAT BACK
2 - REAR SEAT CUSHION FRAME
3 - SEAT CUSHION FRAME BOLTS (4)
4 - SEAT CUSHION HINGE
Fig. 21 FOOTMANS LOOP BRACKET
1 - FOOTMANS LOOP (4)
2 - BOLTS (2 PER LOOP)
3 - CAB BACK PANEL
DRSEATS 23 - 85
when a minimum discharge pressure of 2756 kPa
(400 psi) is reached.
The high pressure relief valve vents only enough
refrigerant to reduce the system pressure, and then
re-seats itself. The majority of the refrigerant is con-
served in the system. If the valve vents refrigerant, it
does not mean that the valve is faulty.
The high pressure relief valve is a factory-cali-
brated unit. The valve cannot be adjusted or
repaired, and must not be removed or otherwise dis-
turbed. The valve is only serviced as a part of the
compressor assembly.
DIAGNOSIS AND TESTING - A/C COMPRESSOR
When investigating an air conditioning related
noise, you must first know the conditions under
which the noise occurs. These conditions include:
weather, vehicle speed, transmission in gear or neu-
tral, engine speed, engine temperature, and any
other special conditions. Noises that develop during
air conditioning operation can often be misleading.
For example: What sounds like a failed front bearing
or connecting rod, may be caused by loose bolts, nuts,
mounting brackets, or a loose compressor clutch
assembly.
Drive belts are speed sensitive. At different engine
speeds and depending upon belt tension, belts can
develop noises that are mistaken for a compressor
noise. Improper belt tension can cause a misleading
noise when the compressor clutch is engaged, which
may not occur when the compressor clutch is disen-
gaged. Check the serpentine drive belt condition and
tension as described in Cooling before beginning this
procedure.
(1) Select a quiet area for testing. Duplicate the
complaint conditions as much as possible. Switch the
compressor on and off several times to clearly iden-
tify the compressor noise. Listen to the compressor
while the clutch is engaged and disengaged. Probe
the compressor with an engine stethoscope or a long
screwdriver with the handle held to your ear to bet-
ter localize the source of the noise.
(2) Loosen all of the compressor mounting hard-
ware and retighten. Tighten the compressor clutch
mounting nut. Be certain that the clutch coil is
mounted securely to the compressor, and that the
clutch plate and rotor are properly aligned and have
the correct air gap (Refer to 24 - HEATING & AIR
CONDITIONING/CONTROLS/A/C COMPRESSOR
CLUTCH - INSTALLATION).
(3) To duplicate a high-ambient temperature condi-
tion (high head pressure), restrict the air flow
through the condenser. Install a manifold gauge set
or a DRBIIItscan tool to be certain that the dis-
charge pressure does not exceed 2760 kPa (400 psi).(4) Check the refrigerant system plumbing for
incorrect routing, rubbing or interference, which can
cause unusual noises. Also check the refrigerant lines
for kinks or sharp bends that will restrict refrigerant
flow, which can cause noises (Refer to 24 - HEATING
& AIR CONDITIONING/PLUMBING - STANDARD
PROCEDURE).
(5) If the noise is from opening and closing of the
high pressure relief valve, recover, evacuate and
recharge the refrigerant system (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - STAN-
DARD PROCEDURE), (Refer to 24 - HEATING &
AIR CONDITIONING/PLUMBING - STANDARD
PROCEDURE - REFRIGERANT SYSTEM EVACU-
ATE) and (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT SYSTEM CHARGE). If the high
pressure relief valve still does not seat properly,
replace the compressor (Refer to 24 - HEATING &
AIR CONDITIONING/PLUMBING/A/C COMPRES-
SOR - REMOVAL).
(6) If the noise is from liquid slugging on the suc-
tion line, replace the accumulator (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING/AC-
CUMULATOR - REMOVAL) and check the refriger-
ant oil level and the refrigerant system charge (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMB-
ING/REFRIGERANT OIL - STANDARD PROCE-
DURE) (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING/ACCUMULATOR -
REMOVAL). If after replacing the accumulator the
slugging condition still exists then replace the com-
pressor.(Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING/A/C COMPRESSOR - REMOVAL).
(7) If the liquid slugging condition continues fol-
lowing accumulator replacement, replace the com-
pressor and repeat Step 1.
REMOVAL
WARNING: REVIEW THE WARNINGS AND CAU-
TIONS IN THE FRONT OF THIS SECTION BEFORE
PERFORMING THE FOLLOWING OPERATION (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
WARNING) and (Refer to 24 - HEATING & AIR CON-
DITIONING/PLUMBING - CAUTION).
NOTE: The A/C compressor may be removed and
repositioned without disconnecting the refrigerant
lines or discharging the refrigerant system. Dis-
charging is not necessary if servicing the compres-
sor clutch, clutch coil, engine, engine cylinder head
or the generator.
(1) Recover the refrigerant from the refrigerant
system (Refer to 24 - HEATING & AIR CONDITION-
DRPLUMBING 24 - 49
A/C COMPRESSOR (Continued)