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panel or fire pump controller. Use the emergency
stop lever to choke off fuel supply and shut the
engine down.
ZF6H engine models: The emergency stop lever is
located on the rear side of the engine on above the
flywheel housing. To stop the engine, pull the
emergency stop lever counter-clockwise until it stops
(see Figure #10A). Continue to hold lever in
“STOP” position until engine comes to a complete
stop.
Figure #10A
2.6 WEEKLY TEST
An experienced operator should always be present
during the weekly test.
NOTE: This engine is designed to operate at rated
load conditions. For testing purposes the engine can
be run at lower load (lower flow) conditions.
Running times in any one period should not exceed
30 minutes maximum.
Before starting the engine make sure of the
following:
1) The operator has free access to stop the
engine in an emergency.
2) The plant room ventilation ducts are open
and the engine has good access for air.
3) All the guards are in position and, if not, for
whatever reason, any rotating parts will be
free and clear without restriction.
4) Battery covers are in place and there is
nothing on top of or touching the engine,
which is not part of the original supply
specification.
5a) Heat Exchanger Cooling: The water supply
for coolant is available again without
restriction.
5b) Radiator Cooling: The air supply for cooling
is available again without restriction.
When engine is running make sure that the coolant
temperature and oil pressure raw cooling water flow
are within the limits specified on the relevant
Installation & Operation Data Sheet (see Page 5).
If the coolant temperature is excessive, check:
a. Cooling loop strainers
b. Proper functioning of thermostat
c. Condition of heat exchanger tube
bundle
3.0 ENGINE SYSTEMS
3.1 FUEL SYSTEM
3.1.1 Diesel Fuel Specification
All diesel fire pump drivers manufactured by Clarke
are designed, tested and warranted for use only with
No. 2-D Diesel Fuel conforming to ASTM
International D-975-11b or British Standard
BS2869:2010+A1:2011 Fuels oils for agricultural,
domestic and industrial engines and boilers -
Specification.
Although the above referenced fuel specifications
allow limited amounts of Biodiesel, 100% petroleum
fuel is preferred and should be used whenever
possible. Biodiesel in any amount greater than that
allowed by the above referenced specifications
should not be used. The use of fuels not referenced
above, or Biodiesel in amounts greater than allowed
in the above referenced specifications, may affect
performance and reliability, and may result in a non-
warrantable engine condition.
To insure engine reliability and performance, the fuel
provided for Clarke fire pump drivers must be
maintained in a quality condition. Refer to NFPA 25
2014, reprint provided below, for guidance to the
minimum requirements for fuel maintenance for all
Clarke fire pump engine installations.
The following is reprinted from the “NFPA 25
2014 Standard for the Inspection, Testing, and
maintenance of Water-Based Fire Protection
Systems,” Copyright © 2013 National Fire
Protection Association®. All Rights Reserved.
8.3.4 Diesel Fuel Testing and Maintenance
8.3.4.1 Diesel fuel shall be tested for
degradation no less than annually.
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