TECHNICAL INFORMATION
5 - 5
Heating And Air Conditioning
Driver's system
Air conditioning capacity: ..............................2 tons
Refrigerant type:......................................... R-134a
Heating capacity:............................. 37,800 Btu/hr.
A/C capacity: ................................... 19,000 Btu/hr.
Air flow:........................... 450 cfm (12,74 m
3
/min.)
Central system
Air conditioning capacity: .......................... 8.0 tons
Refrigerant type:......................................... R-134a
Heating capacity:........................... 152,000 Btu/hr.
A/C capacity: ................................... 92,000 Btu/hr.
Air flow:........................ 2,700 cfm (76,45 m
3
/min.)
A/C compressor (driver's system only)
Number of cylinders: .............................................2
Maximum rpm:............................................... 6,000
Factory oil charge:................10 U.S. oz (295,7 ml)
Approved oil:........................ Castrol SW-68 (POE)
Mobil Artic 1 (POE)
A/C compressor (central system)
Number of cylinders: .............................................6
Operating speed:.........................400 to 2,200 rpm
(1,750 rpm, nominal)
Minimum speed for lubrication:.................400 rpm
Oil capacity: .....................1.13 U.S. gal. (4,3 liters)
Approved oils:......................Castrol SW-68 (POE)
Mobil Artic 1 (POE)
Note: The above oils are suitable for use with
reciprocating compressors using refrigerant R-
134a and with evaporator temperatures above
-40
°
F (-40
°
C).
Oil Specifications
Engine
Heavy-duty engine oil SAE 15W-40, API classifi-
cation CG-4, HT/HS viscosity 3.7 cP and meeting
MIL-L-2104E or F specification. Synthetic oil may
be used if it meets the performance and chemical
requirements of non-synthetic oils outlined previ-
ously. Some engine operating conditions may
require exceptions to this recommendation.
Note: To avoid engine damage, do not use sin-
gle grade (monograde) lubricants, regardless of
API classification.
Automatic transmission
The transmission must be filled with DEXRON IIE
or III automatic transmission fluid or any equiva-
lent Class C4 fluids.
Differential
Multigrade gear oil meeting MIL-L-2105-D:
85W140 is recommended for use in drive axle.
This lubricant performs well over a broad tem-
perature range, providing good gear and bearing
protection in a variety of climates.
If temperature drops below 10ºF (-12ºC), 80W90
should be used, and below -15ºF (-26ºC), 75W90
should be used (in extreme conditions or for bet-
ter performance, full synthetic gear oil can be
used).
Fan gearbox
Synthetic oil Mobil SHC 634 is recommended for
the fan gearbox.
Power steering reservoir
This reservoir must be filled with DEXRON IIE or
III automatic transmission oil.
Wheel bearings
The front and tag axle wheel bearings must be
filled to the level mark in the cap using differential
oil. Drive axle wheel bearings are lubricated by
the differential oil. Maintain differential oil level to
ensure adequate lubrication of drive axle wheel
bearings at all times.
On vehicles equipped with grease-lubricated
wheel bearings, pack with wheel bearing grease.
Antilock Braking System
(ABS)
Standard (XL-45), Optional (XL-40 & 45E)
Components: Electronic Control Module (ECM)
Solenoid control valves
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