New Holland 667TA/EBF, Repair Manual

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1-8
Issued 11-06 Bur 87519804 NA
CHAPTER 1 - DIAGNOSTICS
ENGINE REPAIR MANUAL
ENGINE KNOCKS IRREGULARLY
Knock detected in the crankshaft.
Yes
Check the following items: Journal play and
out-of -roundness, bolt torque for main
journal caps and engine flywheel, oil
pressure. Replace the defective parts or
overhaul the engine.
No
Knock detected in the connecting rods.
Yes
Check the following items: Rod journal end
play and out-of -roundness, bolt torque for
connecting rod caps, connecting rod
torsion, straightness. Replace defective
parts or overhaul the engine.
No
Knock detected in pistons.
Yes
Check the following items: Play between the
pistons and the cylinder liners, integrity of
piston rings, play between the pins and the
piston hubs. Replace the defective parts or
overhaul the engine.
No
Knock detected in the cylinder head.
Yes
Check the following items: Play between the
rocker arms and the valves, injection pump
timing, valve timing. Adjust to proper
specification.
No
Knock detected in valve gear.
Yes
Check and replace if necessary the gears.
Inspect for broken springs, excessive play
between the stems and guides, and the
tappets and seats. Adjust the clearance.
No
Knock detected in injectors.
Yes
Check using the Electronic Service Tool
(EST) and repair or replace if necessary.
No
Knock detected in the engine flywheel.
Yes
Replace loose screws and tighten all
screws to the specified torque and angles.