Paccar TX-18, Operator'S Manual

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• Inspect compressor air filter
element, if equipped, and replace
element if clogged. Check
compressor mounting and drive for
alignment and belt tension. Adjust
if necessary.
• Remove compressor discharge
valve cap nuts and check for
presence of excessive carbon. If
excessive carbon is found, clean or
replace the compressor cylinder
head. Also, check compressor
discharge line for carbon, and
clean or replace the discharge line
if necessary.
• Disassemble compressor and
thoroughly clean and inspect all
parts. Repair or replace all worn or
damaged parts, or replace
compressor with a factory
exchange unit.
Transmission Air Supply
For optimal performance, this transmission
requires a nominal air supply operating
range between 90 psi (5.9 bar) and 130 psi
(9.0 bar).
WARNING
Maintain specified transmission air
system pressure range between 90 psi
(5.9 bar) and 130 psi (9.0 bar). Failure
to maintain proper air system pressure
could result in degraded or complete
loss of transmission engagement and
shift capabilities resulting in property
damage, serious injury, or death.
Air Dryer Oil-coalescing
Cartridge
The air system supplying this component is
equipped with an oil-coalescing air dryer.
The air dryer's oil-coalescing cartridge
must be replaced yearly, regardless of
mileage.
CAUTION
Replace the oil-coalescing desiccant
air dryer cartridge annually, regardless
of mileage. Use only an oil-coalescing
desiccant cartridge as a replacement.
Failure to comply will void the trans-
mission warranty and may cause
transmission damage.
Cooling System
Maintenance
The cooling system in your vehicle was
factory filled with extended life coolant that
meets or exceeds all ASTM D6210 and
Caterpillar EC-1 requirements. PACCAR
recommends only using a 50:50 mixture of
distilled water and ELC when cooling
system service is required. A 50:50 mixture
of extended life coolant (ELC) and distilled
water will provide freeze protection down to
-34 °F (-36.7 °C), which is adequate for
most locations in North America. For
extremely cold operating conditions, a
60:40 mixture (coolant/water ratio) can be
used to provide freeze protection down to
-62 °F (-52.2 °C).
Unless otherwise optioned, factory fill
coolant is an ethylene glycol, nitrited
organic acid technology (NOAT) extended
life coolant (ELC) formulation at a 50:50
coolant-to-distilled water mixture. The
factory fill meets or exceeds ASTM D6210
MAINTENANCE - Air Dryer Oil-coalescing Cartridge
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