Shaft FR back o'ring Q?

[TheGrizzlyGrump]

Might seem a silly question.... but should the Shaft FR back have 2 internal o'rings?

If so I'm missing one, what size are they?

Thanks.

 

[STONESOLDIER]

Yes they should, they are size 18 NBR 70

 

[TheGrizzlyGrump]

Cheers Stoney. Ordered some.