Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Air Cleaner Mixing Elbow, Pressure Cap, Servicing Air Cleaner

Pressure Cap

Closed-loop cooling systems incorporate a pressurized cap to raise the boiling point of the coolant and make use of higher operating temperatures. If leakage or malfunction occurs, replace the pressurized cap with one supplied by Kohler Co. part number 229958.

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1.	Mounting Base	3. Reed Valve Assembly
2.	Retaining Cap

Figure 3-18. Siphon Break

Siphon Break

An optional siphon break is used to prevent seawater entry into the engine when the generator set is shut down. Corrosion buildup may not allow the siphon break to function properly. Therefore, if used, the siphon break must be inspected and cleaned periodically.

NOTE

To prevent siphoning of seawater, run the generator while performing this inspection.

Remove the retaining cap to inspect the reed valve. See Figure 3-18. Clean the reed valve to remove residue and oxidation. Check that the reed valve (opening) is clear. Replace the siphon break if the material has hardened or deteriorated. Install the reed valve with the

valve downward into the mounting base. Install retaining cap and tighten finger-tight only. Do NOT overtighten.

Air Cleaner and

Mixing Elbow

Servicing Air Cleaner

The engine is equipped with a dry-type air cleaner. Every 50 hours (more often if operating under dusty or dirty conditions) remove element and service by tapping element lightly against flat surface to dislodge loose surface dirt. Do not clean in any liquid or blow out with compressed air as this will ruin filter material in element. Service air cleaner after each 50 hours of operation. If dirty, bent, or damaged replace element with genuine Kohler replacement. See Figure 3-19.

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Figure 3-19. Air Cleaner Service

Servicing Mixing Elbow

The mixing elbow combines high temperature exhaust and cooling seawater. These conditions are conducive to rapid deterioration and, combined with engine vibrations, premature failures if not properly maintained. Check the mixing elbow for carbon buildup and corrosion inside the pipe. Clean or replace the mixing elbow as necessary. Inspect the exhaust manifold mounting threads for cracking and corrosion.

TP-5695 12/93 Scheduled Maintenance 3-17