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#224
GROUND
FIGURE F.23 – ENGINE ALTERNATOR CODE 10856
ENGINE PROTECTION SYSTEM CIRCUIT TEST (continued)
PROCEDURE
IMPORTANT: Before proceeding with this test, verify
that the engine has normal oil pressure,
is not overheated, and the alternator
drive belt is in place and properly ten-
sioned.
Open all of the doors on the SAE-400 machine.
WARNING: Secure the doors in the open position
using the door restraint system. If the
machine does not have a door restraint
system, remove the doors or securely
restrain them to prevent them from falling
closed.
CAUTION: The following procedure will temporarily
disable the engine protection system. Be
absolutely certain that engine temperature
and oil pressure are within the normal
range. If the engine is permitted to run
while overheated or with low oil pressure,
severe engine damage will likely result,
and the engine warranty will not cover the
damage. Be absolutely certain that all
wires are connected when the test is com-
pleted.
1. Disconnect the lead from the engine coolant tem-
perature gage or switch.
Code 10856, temp gage, Lead wire #221
Codes 11199 & 11408, temp switch, lead #44
2. Disconnect the lead from the engine oil pressure
switch.
Code 10856, lead #223
Codes 11199 & 11408, lead #54
3. Disconnect the flash/sense lead from the engine
alternator.
Code 10856, lead #224
Codes 11199 & 11408, lead #59
TROUBLESHOOTING AND REPAIR
F-66 F-66
SAE-400 SEVERE DUTY
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