Section 8, Pump body, To remove – Hale SMR-U User Manual

Page 21: To refit, Section 9, Front end oil seal and wear ring, Refitting

Section 8

PUMP BODY

To Remove

Remove the low-pressure manifold, volute body and impeller (Sections 3,5 and 6)
and remove the carbon seal assembly (Section 5). Unscrew the six nuts and spring
washers securing the pump body to the bearing housing. Using a hide faced
hammer, progressively tap around the pump body until it is separated from the
bearing housing, taking care to withdraw the pump body from the two primer feed
tubes at approximately the 4 and 8 o’clock positions.

Normally, the only reason to remove the pump head would be to gain access to the
front oil seal mount on the bearing housing.

To Refit

When refitting, clean the mating faces of the bearing housing assembly and pump
head, ensuring that they are not damaged. Fit new O rings in the two primer feed
tube bores (one or both of these bores may be sealed with special screws if no
priming or other types of primer are used).

Carefully offer up the pump body to align with the feed connections and the six
threaded studs, refit spring washers and nuts to secure. Replacement of the
remainder of components is covered in the sections mentioned above.

Section 9

FRONT END OIL SEAL AND WEAR RING

To gain access to the front-end oil seal, it is necessary to remove pump head
(Section 9) and other relevant sections. Drain bearing housing oil by removing the
drain plug (rear end, centre bottom) catching oil in a suitable receptacle. Remove
water flinger followed by 6 socket head cap screws securing the oil seal housing.

Remove housing and the oil seal may be pressed out and a new one fitted. Fill seal
lip with LM grease. Examine the oil seal wear ring mounted on the pump shaft. If
wear is detected, replacement is required.

Refitting