Cylinder Head, Valves and Manifolds Disassembly/Assembly IMPORTANT: Do not reuse stem seals if removed. Used seals will leak. NOTE: Size and shape of lifting brackets will vary due to numerous engine applications. Apply clean engine oil on intake and exhaust valve stems during assembly. Compress valve springs using a valve spring compressor. Install springs with smaller pitch end or paint mark toward cylinder head. Intake and exhaust valve guides are press fit. Remove guides only if replacement is necessary. (See Inspection/Replacement procedures.) NOTE: If new valves are installed, measure valve recession.
(See Inspection/Replacement procedures.) 1 On 3TNA72 (3009), intake and exhaust valve seat inserts are press fit. Remove inserts only if replacement is necessary. After each valve has been assembled, tap on top of valve stem with a plastic hammer to seat retainer. Inspect all parts for wear or damage. (See Inspection/Replacement procedures.) Stem Seal (6) Replace. Collet Halves (12) Retainer (6) Exhaust Valve Guide (3) Valve Spring (6) Rocker Arm Assembly and Cover Mounting Stud (2) Lifting Bracket (2) Valve Seat Inserts 3TNA72 (3009) Only. Exhaust Valve Intake Valve M82261A 4/7/95 1-23 AllTractorManuals.com Intake Valve Guide (3) Exhaust Man Mounting Stu ifold d (2)