operators_manual

NOTE
DO NOT mix with sodium-based
grease.
PACCAR 20k Front Axle Lube Points
1
2
3
1. Upper kingpin bearing
2. Tie rod end
3. Lower kingpin bearing
NOTE
If it is difficult to grease either the up-
per or lower bearing, try greasing the
bearings with the vehicle jacked up
and supported on axle stands to im-
prove grease flow and flush contami-
nation.
Oil Bath
Lubricate wheel end assembly with a drive
axle lubricant that meets MIL-L-2105D
specifications. Either SAE 80W-90 mineral
based or 75W-90 synthetic gear oil is
acceptable. Check the lubricant level at
each greasing interval. Maintain the
lubrication fluid level at centerline of axle or
fill line on hub cap. Always check fluid level
on flat ground.
CAUTION
Never mix oil bath and grease-packed
wheel ends. Mixing oil and grease will
reduce the effectiveness of both lubri-
cants and may cause damage to the
wheel ends.
Heater and Air Conditioner
Maintenance
The combination heater-air conditioner
provides comfort for those in the cab
through accurate control of the cab
environment in all weather conditions.
Regular attention to the items below will
help you keep the heater-air conditioner
unit running well. Keep the vehicle's
ventilation system, engine exhaust system,
and cab joints properly maintained. It is
recommended that the vehicle's exhaust
system and cab be serviced by a
competent technician as follows:
• Inspected every 15,000 miles
• Whenever a change is noticed in
the sound of the exhaust system
• Whenever the exhaust system,
vehicle underbody, or cab is
damaged
To allow for proper operation of the vehicle
ventilation system, proceed as follows:
• Keep the inlet grille at the base of
the windshield clear of snow, ice,
leaves, and other obstructions at all
times.
MAINTENANCE - Heater and Air Conditioner Maintenance
276 Y53-6126-1A1 (01/21)
5