Pressure Cap; Siphon Break; Air Cleaner And Mixing Elbow; Servicing Air Cleaner - Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Operating And Installation Manual

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.
1. Mounting Base
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.
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
TP-5695 12/93
1
2
3
1-779
3. Reed Valve Assembly
NOTE
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.
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.
1-905
Scheduled Maintenance 3-17