John Deere — 8. Install engine oil pump assembly.

A John Deere service procedure — check it applies to your exact model before use.

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Procedure

1. 9. Install crankshaft rear oil seal housing, oil seal, and wear sleeve.
2. 10. Install timing gear cover. Install front crankshaft wear sleeve and oil seal.
3. 11. Install oil pan.
4. 12. Install engine oil conditioning assembly.
5. 13. Install water pump.
6. 14. Install flywheel and housing: SAE 1 or SAE 2: Flywheel goes on before housing. SAE 3: Housing goes on before flywheel.
7. 15. Install cylinder head, push rods, and rocker arm assembly. Measure valve lift and adjust valve clearance.
8. 16. Install rocker arm cover. Install breather hose.
9. 17. Install exhaust manifold.
10. 18. Install aftercooler and intake manifold assembly.
11. 19. Install ignition timing sensor, coils, ICU, mounting plate, spacer plate, and wiring harness.
12. 20. Install spark plugs and ignition wires.
13. 21. Install turbocharger, exhaust elbow, coolant inlet and outlet lines, and oil lines.
14. 22. Install carburetor, throttle valve, and pressure regulator.
15. 23. Install crankshaft pulley and damper.

Source: manual:CTM82.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.