Troubleshooting

Recommended Actions
Illustration 18 g02919737
Table 12
Troubleshooting Test Steps
Values Results
1. Breather Filter
A. Check that the breather element is correctly installed and that
the element is not damaged.
B. Check for restrictions or blockages in orifice (2).
Breather filter Result: The breather element is incorrectly installed or
damaged.
Repair: Install a new filter element. Refer to Operation
and Maintenance Manual, “Engine Crankcase Breather
Element - Replace”.
Note: If a new filter element blocks before the service pe-
riod is completed, the blockage can indicate a fault in the
engine.
Result: There is a restriction or blockage in orifice (2).
Repair: If necessary, replace the crankcase breather. Re-
fer to Disassembly and Assembly, “Crankcase Breather -
Remove” and refer to Disassembly and Assembly, “Crank-
case Breather - Install”
Result: The breather filter is OK.
Proceed to Test Step 2.
2. Breather Hoses
A. Check the oil return hose and the breather outlet hose for re-
strictions or blockages.
Breather hoses Result: There is a restriction or blockage in one of the
breather hoses.
Repair: Replace the breather hoses, as necessary.
Result: The breather hoses are OK.
Proceed to Test Step 3.
(continued)
44 UENR0612-07
Symptom Troubleshooting
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