Section 10, Rear end oil seal and wear ring, Refitting – Hale SMR-U User Manual

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Section 10

REAR END OIL SEAL AND WEAR RING

For access to the rear end shaft and oil seal, it is necessary to disconnect propeller
shaft from pump drive flange and drain oil from the bearing housing by removing the
drain plug (rear end, centre bottom) catching the oil in a suitable receptacle.

Remove the tacho sender and fit shaft locking screw (Tool No 60275/11) locating the
spigot in to one of the drive flange holes. Remove the drive flange nut and
lockwashers. Remove the shaft locking screw and withdraw the drive flange.

Remove 4 oil seal mounting flange bolts and washers to remove mounting flange – a
new oil seal may be fitted at this stage. If the rear oil seal wear ring shows signs of
wear, it must be replaced by firstly removing drive shaft key to allow withdrawal of
wear ring.

Refitting

All components must be clean and free from blemishes.

After replacing the shaft O ring and oil seal wear ring, the shaft key must be refitted
and the oil seal housing refitted, together with its mounted oil seal, the tapped boss
for the tacho sender towards the top of the bearing housing as viewed from the drive
end. Clamp in position with the 4 bolts and washers. Refit the drive flange and lock
its rotational position by means of Tool No 60275/11. Fit a new pair of lockwashers
followed by the shaft nut, which should be tightened to 400Nm (295 lbs. ft). Remove
the locking tool and refit the tacho sender unit. Refill the bearing housing to the
correct level using the recommended oil.