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9. Reset the mechanical fouling detector and check the general performance of the engine when restarted. For
gas engines, also check for correct carburetion.
3. MAINTENANCE OF GHF AIR FILTERS
The parameter that determines the fouling level of an air filter is the air flow restriction at the air filter outlet. On
Kohler engines, the maximum permissible airflow restriction or pressure loss is 38 mbar and it is measured
with the engine running at rated power and load.
The GHF air filter on Kohler engines includes either a mechanical airflow restriction detector or an electric
detector. The mechanical detector has a red-coloured indicator showing up completely when the maximum
permissible pressure drop has been reached. The electric detector indicates the fouling condition of the filters by
means of a light signal or by transmitting an electric signal to the PLC.
Always service the GHF filter, i.e. replace the two filtering cartridges, with the engine at rest.
3.1 CHANGING THE GHF FILTERING CARTRIDGES
Changing the cartridges of a GHF filter must take place with the engine at rest, in a ventilated room, following
these instructions:
1. Undo the clamp form one side of the filter.
2. Remove the cover.
3. Disassemble the fouled cartridge.
4. Install a new filtering cartridge. Do this operation as fast as you can to prevent dust and/or particles from
entering the engine.
5. Fit the cover correctly, observing the direction specified on it.
6. Secure the clamp.
7. Repeat the same operation for the second cartridge of the filter, depending on whether the filter has 1 or 2
cartridges.
8. Reset the mechanical fouling detector and check the general performance of the engine when restarted. For
gas engines, also check for correct carburetion, since the mixture could be leaner.
NEVER clean a filtering cartridge
PRODUCT INFORMATION
IO-C-M-35-001e
AIR FILTERS. MAINTENANCE
5.2.49
INDEX
DATE
E
September 2016
O&M_2.002211.810_A_10_2016
Dep. 2
5/6
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