Changing Fuel Filters; C18 Engine Series - Clarke C18H Instruction Manual

Figure # 12
3.1.2.2 Priming C18H Engine Series when the engine
has been run out of fuel:
Note: Additional steps must be taken to prime the
engine when the engine has ceased to run due to an
exhausted fuel supply.
1) Fill the fuel tank with clean diesel fuel of the
appropriate grade.
2) Open the air purge screw (2) three full turns.
Do not remove screw.
3) Crank the engine for 30 seconds. Then allow
the starter to rest for 2 minutes. Use a suitable
container to catch fuel flow from the air purge
screw bore. You may use the hand priming
pump (1), in lieu of starting the engine. See
Figure #11.
4) Crank the engine for 30 seconds. Allow the
starter to cool for 2 minutes.
5) Repeat step 4 until the engine starts and runs.
6) Clean any residual fuel from all engine
components.
3.1.3 Changing the Fuel Filters
3.1.3.1 C18H Engine Series
Each engine has two fuel filters. For identity, the
primary filter incorporates the transparent water
separator. Both primary and secondary filters must be
replaced at the same time.
Replacing Primary Fuel Filter/Water Separator
1) Close fuel shut-off valve at bottom of fuel
tank, if equipped.
2) Thoroughly clean
surrounding area to keep from getting dirt and
debris into fuel system. See Figure#13.
filter base (4) and
3) Remove element (1) from the mounting base
while bowl (2) is still attached.
4) Dispose of the filter contents appropriately.
Remove bowl (2) from element (1). The bowl
is reusable, do not discard. Dispose of the
used element.
5) Remove the o-ring from the gland of the bowl.
Clean the bowl and the o-ring. Inspect the o-
ring for damage or deterioration. Replace if
necessary.
6) Lubricate the o-ring with clean diesel fuel.
7) Install bowl (2) on a new element. Tighten the
bowl by hand. Do not use tools to tighten the
bowl.
8) Lubricate the top seal of the element (1) with
clean diesel fuel. Install the new element on
the filter base. Tighten the element by hand.
9) Ensure the drain (3) is in the closed position.
10) Open the fuel shut-off valve at the bottom of
the fuel tank, if equipped.
11) Start the engine and check for leaks. Run the
engine for 1 minute.
check for leaks again.
12) The primary filter/water separator is under
suction. A leak will allow air to enter the fuel.
Aerated fuel can cause loss of power.
Replacing Secondary Fuel Filter Element
1) Stop the engine. Close fuel shut-off valve at
bottom of fuel tank, if equipped. Disconnect
battery power.
2) It may be necessary to relieve residual fuel
pressure from the fuel system before the fuel
filter is removed. Wait 1 to 5 minutes until the
fuel pressure is lowered.
container to catch any fuel that may spill.
3) Remove and discard the used filter.
4) Apply clean diesel fuel to the new filter o-
rings.
5) Install the new fuel filters. Spin the fuel filter
onto the filter base until the o-ring makes
contact. Use the rotation index marks on the
filters as a guide for proper tightening.
Tighten filters according to the instructions
that are on the fuel filters. Do not overtighten
the filters.
6) Open the fuel supply valve. The engine will
need to be purged of air. Refer to Section
3.1.2.1 for fuel system priming instructions.
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Stop the engine and
Use a suitable