PLATE-ORIFICE 8N3457 - Caterpillar

Probable Causes
Inspect the vibration damper.
Engine supports
Driven equipment
Engine misfiring
Running roughRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Inspect the Vibration Damper
A. Clean any debris from around the damper. Check the vibration damper for damage.
B. Inspect the mounting bolts for damage and/or for wear. Refer to the Disassembly and Assembly manual.
Damper
Result: The vibration damper or the mounting bolts are not damaged.
Proceed to Test Step 2.
Result: The vibration damper or the mounting bolts are damaged.
Repair: Replace the damaged vibration damper or the damaged mounting bolts.
2. Inspect the Engine Supports
A. Inspect the mounts and the brackets while you run the engine through the speed range. Look for mounts and brackets that are loose and/or broken.
B. Check the alignment of the following before operating the engine under load for any length of time:
- Mounts
- Coupling
Engine Supports
Result: The mounts and brackets are not loose and/or broken.
Proceed to Test Step 3.
Result: The mounts and brackets are loose and/or broken.
Repair: Replace the mounts and brackets that are loose and/or broken.
3. Inspect the Driven Equipment
A. Inspect the mounting bolts for the driven equipment. Inspect the alignment and the balance of the driven equipment.
B. Inspect the coupling.
Driven Equipment
Result: The driven equipment and the alignment are OK.
Repair: Refer to Troubleshooting, "Engine Misfires, Runs Rough, or Is Unstable", for more troubleshooting information.
Result The driven equipment and the alignment are not OK.
Repair: Repair or replace the driven equipment.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).