Paccar PX-7, Operator'S Manual

Page: 67 / 92

NOTE
Inhibitor concentration level deter-
mines corrosion protection. If you are
concerned about possible coolant
quality, contamination, or mechanical
problems, submit a coolant sample to
your dealer for analysis. Improper
maintenance may cause coolant deg-
radation and could result in damage to
the cooling system and engine compo-
nents. Consult your dealer or the cool-
ant manufacturer's representative for
recommended extended life coolant
test kits, test strips, and laboratory
sample procedures.
Radiator Hoses
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
1. Check the following radiator hose
conditions:
• Deterioration/signs of leaking
• Hose clamp torque
Drive Belts
NOTE
Always fit the same type of belts as
the ones replaced.
Engine Belt Checks
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
1. Inspect the engine drive belts for
the following conditions:
• Condition, signs of wear/
deterioration
• Alignment
Fan Belt Tensioner
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
1. Check and correct fan belt
tensioner.
• Mounting bolt torque
• Tensioner maintains proper belt
tension
Poly V-belt and Fan Drive Belt
Removal
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
1. Disconnect the electrical ground
wire from the battery.
2. Reach between the fan blades and
remove the fan blade mounting
bolts using a 9/16 in. socket to
remove the mounting nuts.
3. Place a flex-bar with a 15 mm
socket on the fastener securing the
automatic belt tensioner's roller, as
shown in the image.
4. Rotate the flex-bar as shown in the
diagram to relieve belt tension.
5. With the belt tensioner pressure
relieved, remove the poly V-belt
from the pulleys.
• The tensioner can be
temporarily blocked with a
0.16-0.2 in. (4-5 mm) thick pin
(bore). This facilitates removal
and installation of the poly V-
belt.
6. After removing the belt, carefully
allow the belt tensioner to spring
back to the stop (if it had not been
temporarily blocked).
ENGINE MAINTENANCE - Maintenance Procedures
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