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Disconnecting the battery can
result in damage to the battery
diodes. In applications which
have two (2) sets of batteries,
switching from one set to the
other while the engine is running
will momentarily disconnect
the batteries. This can result in
equipment damage.
4. If a booster battery is to be used,
batteries must be connected
correctly (negative to negative,
positive to positive) to avoid
equipment damage.
5. Never use a fast charger with the
batteries connected or as a booster
for battery output.
For information on the alternator
assembly, contact an authorized Delco
Remy® distributor.
Item 20 – Engine and
Transmission Mounts
The engine and transmission mounting
bolts and the condition of the mounting
pads should be checked every 60,000
miles (96,000 km) or 600 hours.
Tighten and/or repair as necessary.
Item 21 – Crankcase
Pressure
The crankcase pressure should be
checked and recorded at the intervals
in the maintenance schedules.
Crankcase pressure should be no
All information subject to change without notice. (Rev. May 2004)
DDC-SVC-MAN-0057 0305 Copyright © 2003 DETROIT DIESEL CORPORATION
SERIES 40 ENGINE OPERATOR'S GUIDE
higher than 6 in. water (1.5 kPa) at
maximum no-load speed with the
breather restrictor tool installed.
Item 22 – Fan Hub
The fan hub assembly includes
a sealed bearing which is not
serviceable.
□ Inspection Interval: Inspect the
fan hub for free bearing rotation at
the interval shown in the regular
maintenance interval table for
your engine. If the hub does not
spin freely or is noisy (indicating
bearings are "dry" or worn),
replace the fan hub.
□ Replacement Interval: Replace
the fan hub at the interval shown
in the regular maintenance interval
table for your engine, regardless
of apparent condition.
69
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