41121-881-020 Honda SEE PART DETAILS - SUP; SHAFT, PINION (Honda Code 1041102).

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Dispose of all fluids according to local regulations and mandates.
Note: Ensure that the engine lubricating oil is drained. Refer to Operation and Maintenance Manual, "Engine Oil and Filter - Change" for the correct procedure.Note: In order to remove a cast iron oil pan, the engine must be removed from the machine. The engine should be mounted in a suitable stand and placed in the inverted position.
Illustration 1 g02835137
Mount the engine in a suitable stand and place in the inverted position.
If necessary, remove dipstick (2) from engine oil pan (3).
Remove sealing washer (5) (not shown) from oil drain plug (6).
Remove bolts (4) from engine oil pan (3). Note: Support the weight of the engine oil pan.
Remove the engine oil pan from the cylinder block.
Remove gasket (1) (not shown).
Illustration 2 g02835177
Typical example
If necessary, follow Step 7.a through Step 7.d in order to remove oil suction pipe (8) from the cylinder block.
Remove Allen head cap screw (9) from oil suction pipe (8).
Remove bolts (10) from the oil suction pipe.
Remove the oil suction pipe from the cylinder block.
Remove O-ring (7) from oil suction pipe (8). Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
Illustration 3 g02835177
Typical example
If necessary, follow Step 2.a through Step 2.f in order to install oil suction pipe (8).
Install new O-ring seal (7) to oil suction pipe (8).
Install the oil suction pipe to the cylinder block.
Install the Allen head cap screw to the oil suction pipe.
Install bolts (10) to the oil suction pipe support.
Tighten Allen head cap screw (9) to a torque of 10 N m (89 lb in).
When M8 bolts are installed, tighten bolts (10) to a torque of 25 N m (221 lb in). When M10 bolts are installed, tighten bolts (10) to a torque of 45 N m (33 lb ft).
Clean the mating surface of the cylinder block.
Illustration 4 g02835137
Illustration 5 g02835539
Initial tightening sequence
Illustration 6 g02835357
Secondary tightening sequence
Position gasket (1) (not shown) onto engine oil pan (4).
Position spacer (2) onto the engine oil pan.
Position the engine oil pan onto the cylinder block. Use a suitable tool to support the weight of the engine oil pan.
Install bolts (4) finger tight. Note: Ensure that the rear of the engine oil pan is aligned with the rear of the cylinder block.
Tighten bolts (4) in the initial sequence that is shown in Illustration 5. Tighten bolts (7) to a torque of 45 N m (33 lb ft).
Tighten bolts (4) in the final sequence that is shown in Illustration 6. Tighten bolts (7) to a torque of 45 N m (33 lb ft).
Install a new sealing washer (5) to oil drain plug (6).
Install oil drain plug (6) to the engine oil pan . Tighten the oil drain plug to a torque of 50 N m (37 lb ft).
Remove the engine from the suitable stand.
Fill the engine oil pan to the correct level. Refer to Operation and Maintenance Manual, "Engine Oil and Filter - Change" for the correct procedure.