MAINTENANCE MANUAL
GP/146/99. Issue 9. October 2005
Section 9
PUMP HEAD
To Remove
Remove the low pressure manifold, volute body, impellers and cover plate (Sections
6,7,3 and 4) 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 head 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 head 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 10
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
impeller shims and 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
All components must be clean and free from blemishes.
©Hale Products Europe LTD, Warwick
GP/146/99
WTmaint - Issue9. 10-2005October 2005
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