32
Figure #13 – Primary Filter Assembly
3.1.4 Fuel Tanks
Keep the fuel tank filled to reduce condensation to a
minimum. Open drain at the bottom of the fuel tank
once a week to drain off any possible water and/or
sediment. Fill tank after each test run.
Note: Per NFPA 25 standards, the fuel tank level must
never be less than 67% of its capacity.
Maximum Allowable Fuel Head above Fuel lift pump,
Supply or Return.
Engine model feet meters
3.2 AIR/EXHAUST SYSTEM
3.2.1 Ambient Conditions
Clarke engines are tested in accordance with SAE
J1349 (Clarke USA) or ISO 3046 (Clarke UK). In this
capacity, they may be de-rated to meet certain site
conditions, failure to do so can seriously impede the
performance of the engine and could lead to premature
failure.
3.2.2 Ventilation
The engine must be provided with adequate ventilation
to satisfy the requirements of the combustion system,
radiator cooling systems where fitted, and allow
adequate dissipation of radiated heat and crankcase
emissions. For all this data refer to Installation &
Operation Data (see Page 5). This data can be used for
proper sizing of inlet and outlet louvers.
3.2.3 Standard Air Filter
The standard air filter is a single – stage, disposable
type. Should a situation occur where the air filter
becomes plugged with dirt (starving the engine of air),
loss of power and heavy black smoke will result; the
air filter element should be replaced immediately. See
Appendix A for air filter part numbers by Clarke
Engine Model. The maximum intake air restriction
allowed, per engine model, can be seen in the
following table. See Figure #14 for an example of the
air filter element installation.
CAUTION: Do not attempt to remove the air filter
while an engine is running nor run the engine while the
air filter is off. Exposed components could cause
severe injury to personnel and major internal engine
damage could occur should any foreign matter be
drawn into the engine.
Engine model
Air filter
restriction limit
(inches of water)
C32H0-UFAC60
30
C32H0-UFAC50
C32H0-UFAC40
C32H0-UFAC30
C32H0-UFAC20
C32H0-UFAC10
C32H0-UFAC68
24
C32H0-UFAC62
C32H0-UFAC58
C32H0-UFAC52
C32H0-UFAC48
C32H0-UFAC42
C32H0-UFAC38
C32H0-UFAC32
C32H0-UFAC28
C32H0-UFAC22
C32H0-UFAC18
C32H0-UFAC12
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