Jabiru 3300 - Reassembly - Re-fitting The Crankshaft Oil Seal and Propeller Flange.

Introduction ...

This page contains photos of a Jabiru 3300A Solid Lifter engine under going a bulk strip and rebuild. This page documents the process of re-fitting the crankshaft oil seal and propeller flange.



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Image 1

Here is the front oil seal housing. It has had a new crankshaft oil seal fitted and bonded into the housing using some Loctite 5910 ...

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Image 2

Having thoroughly cleaned and degreased the mating surface apply a uniform coat on Loctite 518 taking care not to get any of the Loctite 518 on the oil seal itself ...

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Degrease the front of the crankcases where the oil seal housing locates ...

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To facilitate easy sliding of the oil seal over the end of the crankshaft without damaging the sealing face of the oil seal, apply some GP grease to the crankshaft end and the oil seal inner surface ...

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Torque the oil seal housing as per the overhaul manual ...

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Wipe any excess GP grease off the end of the crankshaft ...

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Here are the six new propeller flange bolts. Note the hole drilled in the heads to accomodate wire for safe-tying ...

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The next step is to re-fit the propeller flange to the crankshaft. Please see Part - 8 - Preparing The Crankshaft For Propeller Flange Refit where some additional preparation work is covered. Next, having blasted the threaded holes at the the end of the crankshaft with compressed to dismiss any FOD, clean both the crankshaft threads and the propeller flange bolts with Loctite 7471 Cure Accelerator. Let them dry and then apply a dot of Loctite 620 to the bolts ...

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Bolt a torque bar to the propeller flange to prevent the propeller flange / crankshaft from rotating. Offer up the propeller flange to the crankshaft, torque the bolts up finger tight. Work quickly. Loctite 620 has a limited working time window. Torque up the bolts together with their belleville washer to target torque. Ensure that you torque up the bolts in the prescribed pattern as described in the overhaul manual. It is possible that you may need two people for perform this task, one to hold the torque bar steady and keep the crankshaft/propeller flange in check, and one to use the torque wrench ...

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Here are the newly torqued up bolts together with a new set of belleville washers ...

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Next we can remove the torque'ing bar ...

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And safe-tie the bolts in pairs ...

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