Model 2120 Tractor TM-4252 (Dec-70) Engine 20 General Information, Diagnosing Malfunctions 5-5 Cylinder liner seals leaking Bent push rods Worn camshaft ABNORMAL ENGINE NOISE Worn rocker arm shaft Incorrect engine timing Insufficient engine lubrication Worn main or connecting rod bearings Excessive crankshaft end play DETONATION OR PRE-IGNITION Loose main bearing caps Oil picked up by intake air stream (intake manifold) Foreign material in combustion chamber Dirty or faulty fuel injectors Worn piston pin bushings and pins Scored pistons Improper engine timing Worn timing gears Injector tip holes enlarged Excessive valve clearance Injector tips broken Worn cam followers Carbon build-up in compression chamber res NOTE:
Overall and detailed information on engine troubles and repair see also " Fundamentals of Service, Engines" manual. Printed in Germany