Hale MBP Booster User Manual
Page 84
83
Silencer Series Booster Pump, p/n: 029-0020-83-0
Preventive Maintenance
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2. Remove the volute, impeller, mechanical seal, pump head, and pump shaft
oil seal. See heading “Servicing the Booster Pump” on page 69.
3. Unfasten the twelve hex screws and hardware securing the drive unit cover
to the gearbox housing. Remove the drive unit cover and gasket.
4. Scrape all gasket material from mating surfaces, taking care not to scratch the
machined finishes. The gasket must be replaced.
5. Remove the two 3/4” NPT x 3/8” compression fittings that secure the brass U-
shaped cooling tube to the braided cooling hoses.
To remove the cooling tube, it must be cut using a hacksaw or similar tool.
Cut the tube on the outside of the gearbox. (See Figure 6-12: “B Gearbox
Parts Identification,” on page 82.)
6. Remove the input shaft retaining ring from the gear housing.
7. Remove the knock-out plug. A new plug should be used during installation.
8. Using a brass drift punch, push the input shaft out of the gear box while
protecting the drive gear from falling into the gearbox housing.
Once the input shaft is clear of the gearbox housing, remove the input gear
from the gearbox housing.
9. If necessary, remove the rear input shaft bearing from the input shaft using an
appropriate puller. It is not required to remove the bearing from the shaft to
clean and inspect it.
Note: If your pump assembly includes the optional Tachometer Drive Assembly,
it must be removed. See heading “Tachometer Drive Option” on page 88.
10. Remove the four hex screws and hardware that secure the bearing cover.
Remove the bearing cover, bearing spacers, and bearing cover gasket. The
gasket is reusable if not damaged.
11. Use a drift punch to begin pushing the pump shaft assembly from the gearbox
housing towards the pump side. Be careful not to lose the pump gear key
inside the gearbox.
12. Using a bearing assembly socket or spanner wrench, remove the bearing lock
nut. The pump shaft may have to be secured using a strap wrench while the
lock nut is removed. Remove the bearing washer.
Note: 3.74 ratio gearboxes use N-06 lock nuts, while the other ratios use N-07
lock nuts.