Maintenance; General Recommendations - PREVOST H3-41 Maintenance Manual

FIGURE 3: COOLANT SURGE TANK ON H3 SERIES VEHICLES
3.

MAINTENANCE

3.1

GENERAL RECOMMENDATIONS

A systematic routine inspection of cooling
system components is essential to ensure
maximum engine and heating system efficiency.
Check coolant level in the surge/recovery
•
tank daily, and correct if required. Test
antifreeze strength.
Check water pump belt and replace if frayed
•
or badly worn.
• Check radiator cores for leaks and make
sure the cores are not clogged with dirt or
insects. To avoid damaging the fins, clean
cores with a low-pressure air hose. Steam
clean if required.
Inspect the water pump operation. A leaky
•
pump sucks in air, increasing corrosion.
Repair all leaks promptly. Unrepaired leaks
•
can lead to trouble. Inspect and tighten
radiator
replace thermostat regularly.
NOTE
In order to ensure the integrity of the system, it
is recommended that a periodic cooling system
pressure check be made. Pressurize the
cooling system to 103-138 kPa (15-20 psi)
using Radiator and Cooling System Tester,
J24460-1. Do not exceed 138 kPa (20 psi).
Any measurable drop in pressure may indicate
a leak. Whenever the oil pan is removed, the
cooling system should be pressure checked as
a means of identifying any incipient coolant
leaks. Make sure the cause of the internal leak
has
contaminated system.
Hoses and hose connections should be clean
and free of oil and grease before hose clamp
installation. Do not use soap, lubricant or
sealing compound on hose connections.
PA1621 Maintenance Manual All Series
SECTION 05: COOLING SYSTEM
mounts periodically.
been corrected before
CAUTION
|
Section 05 revised Feb 2019
Test and
flushing the
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