System Operational Checks
At the end of each check, if no problem is found, that
This procedure is designed so the mechanic can make
check is complete or an additional check is needed. If
a quick check of the engine using a minimum amount
problem is indicated, you will be given repair required
of diagnostic equipment. If you need additional
and group location. If verification is needed, you will be
information, read Theory of Operation, Group 9010-05.
given the next best source of information:
A location will be required which is level and has
10--System Operational Checks
adequate space to complete the driving checks.
The engine and all other major components must be at
operating temperature for some checks. A tachometer
Locate system check in the left column and read
completely, following this sequence from left to right.
Read each check completely before performing.
1 COOLING SYSTEM CHECKS
COOLANT LEVEL AND
Engine stopped, radiator cool.
YES: Go to next check.
CONDITION IN COOLANT
Inspect coolant level and condition in coolant recovery
NO: Add coolant if low.
Drain and flush overflow
tank and radiator, replace
coolant if dirty or rusty. If
Is coolant level between FULL and LOW marks on
coolant is oily check for
coolant recovery tank?
hydraulic or engine oil
leaks into cooling system.
Is coolant free of oil, foam, or rust?
Go to Group 0510 or