Table 29
Troubleshooting Test Steps
Values Results
1. Breather Filter
A. Check that filter element (2) is correctly installed and that
the element is not damaged.
B. Check for restrictions or blockages in breather canister (3).
Note: In cold ambient conditions, ice can form in the outlets of
the breather canister.
Filter Result: The filter element (2) is not correctly installed or
the element is damaged.
Repair: Install the filter element correctly or replace the fil-
ter element.
Result: There are restrictions or blockages in the breather
canister.
Repair: Clean the interior of the breather canister.
Result: The breather is clean and operating correctly.
Proceed to Test Step 2.
2. Breather Hoses
A. Make sure that the oil return hose from the breather canis-
ter is not pinched or blocked.
B. Make sure that the breather outlet hose from the breather
canister is not pinched or blocked.
Hoses Result: One or more of the hoses is pinched or blocked.
Repair: Clear the hose or replace the hose.
Result: All of the hoses are clear.
Proceed to Test Step 3.
3. Excessive Blow-by
Note: Excessive blow-by increases the flow of fumes through
the breather system and can cause the breather filter to block.
The pressure relief valve may then open.
A. Check the engine for excessive blow-by.
Blow-by Result: There is excessive blow-by.
Repair: Replace the breather filter.
Investigate the cause of the excessive blow-by. Refer to
Troubleshooting, “Oil Consumption Is Excessive”.
Result: The blow-by is not excessive.
Contact the Dealer Solutions Network (DSN).
i05998449
Crankcase Fumes Disposal
Tube Has Oil Draining
A discharge of condensation from the breather is
normal. The discharge is normally clear but can
contain soot. Although the discharge can contain oil
vapor, any liquid oil must be limited to 0.5 g (0.02 oz)
per hour. An oil discharge in excess of 0.5 g
(0.02 oz) must be investigated.
Probable Causes
• Breather filter
• Engine oil level
• One-way valve
• Excessive blow-by
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
92 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
