A couple of new Waterpumps came my way.
They were the new ones from Lincolnshire.
To be fair, neither had faults. ( one had done 30 miles, the other about 500)
Both engines were apart again though.
They were only sent for checking over.
There is no spline between the shaft & impellor on these new pumps.
No doubt risky to refit, as the bolt cannot help to transmit clamp load or torque in either original or new arrangement.
The interference fit can’t really be relied upon for a second time though….
Thanks to Richard the stag for his suggestion:- fit a grubscrew to the impellor & grind a flat on the shaft.
Loctite 242 & that seemed to work.
Will likely also work for impellors that have lost their splines due to careless re-assembling. (Aka impellor fitted with the spline tooth on tooth instead of engaged)
Imho the original impellors never had a actually spline cut… it got formed during initial assembly! …. The shaft most likely cut its way into the slightly reduced / stepped impellor diameter at the top of the shaft.
They were the new ones from Lincolnshire.
To be fair, neither had faults. ( one had done 30 miles, the other about 500)
Both engines were apart again though.
They were only sent for checking over.
There is no spline between the shaft & impellor on these new pumps.
No doubt risky to refit, as the bolt cannot help to transmit clamp load or torque in either original or new arrangement.
The interference fit can’t really be relied upon for a second time though….
Thanks to Richard the stag for his suggestion:- fit a grubscrew to the impellor & grind a flat on the shaft.
Loctite 242 & that seemed to work.
Will likely also work for impellors that have lost their splines due to careless re-assembling. (Aka impellor fitted with the spline tooth on tooth instead of engaged)
Imho the original impellors never had a actually spline cut… it got formed during initial assembly! …. The shaft most likely cut its way into the slightly reduced / stepped impellor diameter at the top of the shaft.
Comment