Item 13 - Water Pump And Coolant Inhibitor Element; Water Pump Drain Hole; Coolant Inhibitor Element - Detroit Diesel 50 Series Operator's Manual

Figure 17 Spin-On Fuel Filter
Location
Install new spin-on filter elements
on non-vehicle engines every 150
hours. Replace spin-on filter elements
immediately if plugging is indicated,
regardless of mileage or hour intervals.
Item 13 – Water Pump and

Coolant Inhibitor Element

Check the water pump and the coolant
inhibitor element.
Water Pump Drain Hole — The
water pump drain hole should be
inspected every 6 months to make
sure it is open. A small chemical
build-up or streaking at the drain hole
may occur. This is not an indication
of a defective water pump or seal.
Remove the build-up with a mild
detergent cleaner and a brush. If
coolant does not leak from the drain
hole under normal conditions, do not
replace the water pump.
All information subject to change without notice. (Rev. 01/ 04)
6SE550 0401 Copyright © 2004 DETROIT DIESEL CORPORATION
SERIES 50 OPERATOR'S GUIDE
Coolant Inhibitor Element — If
the cooling system is protected by a
supplemental coolant additive (SCA)
element, the coolant must be tested
at required intervals and the element
replaced, if required. See Figure 18.
Figure 18 Coolant Inhibitor
Element
Required test intervals are
listed in Table 25. For SCA test
procedures refer to How to Select
Coolant and then SCA Test Procedures
in this guide. Use the coolant filter
element required.
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