TECHNICAL INFORMATION
HEATING AND AIR CONDITIONING
Two air conditioning systems are available: the
large capacity (central) A/C or the small capacity
A/C (also known as driver’s air). Vehicles
equipped with the large capacity A/C benefit
from a combination heating and cooling system
that provides adequate capacity of conditioned
and filtered air for all climactic conditions. Fresh
air is drawn into the system from the left
(driver’s) side of the vehicle. Return air is taken
from the middle of the vehicle. The driver’s
heater and defogger are controlled separately
from the central unit. An air mixture selector
enables air to be drawn into the system from
outside the vehicle or recirculated. Driver’s air
provides cooling for the driver’s area only,
maximizing available baggage space for other
uses.
SMALL CAPACITY A/C
Air conditioning
capacity
2 tons
Refrigerant type 134a
Heating capacity 37 000 Btu/h
Air flow 450 cfm (12,7 m
/min)
COMPRESSOR (For small capacity A/C)
Number of cylinders 2
Operating speed
400 to 2 200 rpm
(1,750 rpm, nominal)
Oil capacity 4.5 U.S. qts (4,3 l)
Approved oil Castrol SW-68 (POE)
LARGE CAPACITY A/C
Air conditioning
capacity
7.5 tons
Refrigerant type 134a
Heating capacity 152 000 Btu/h
Air flow 2 600 cfm (73,6 m
/min)
COMPRESSOR (For large capacity A/C)
Number of cylinders 6
Operating speed
400 to 2 200 rpm
(1,750 rpm, nominal)
Minimum speed for
lubrication
400 rpm
Oil capacity 4.5 U.S. qts (4,3 l)
Approved oil Castrol SW-68 (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 meeting API
Classification CG-4.
AUTOMATIC TRANSMISSION
The transmission must be filled with Dexron IIE,
Dexron III automatic transmission fluid, Castrol
TranSynd Synthetic Fluid or any equivalent Class
C4 hydraulic fluid.
DIFFERENTIAL
Multigrade gear oil meeting MIL-L-2105-D:
85W140 is recommended for use in drive axle.
This lubricant performs well over a broad
temperature range, providing good gear and
bearing protection in a variety of climates. If
temperature drops below 10°F (-12°C), 80W90
should be used, and below -15°F (-26°C),
75W90 should be used. In extreme conditions or
for better performance, full synthetic gear oil can
be used.
FAN GEARBOX
Synthetic oil Mobil SHC 630 (Prévost #180217)
is recommended for the fan gearbox.
POWER STEERING RESERVOIR
This reservoir must be filled with automatic
transmission oil, Dexron IIE, Dexron III or
Mercon fluid.
WHEEL BEARINGS
The front and tag axle wheel bearings must be
filled with differential oil to a level between the
FULL and ADD lines in the cap. Drive axle wheel
bearings are lubricated by the differential oil.
Maintain differential oil level to ensure adequate
8-4
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