Hale 4DK Series - Manual (Page 35)

Manual p/n: 029-0020-79-0 35
4DK Series Pumps
1. Install the impeller shaft key into the slot on
the pump shaft.
2. Carefully slide impeller over pump shaft
aligning keyway with impeller key.
3. While holding the impeller with a strap
wrench, tighten impeller nut.
4. Install spring pin to lock the impeller nut to
the pump shaft. You may have to apply a
little torque to the nut to align the spring pin
to the shaft hole.
5. Install pump head. See the following.
Pump Head Installation
See Figure 15: "Pump Body and Impeller
Assembly" on page 32.
1. Use a press to install a new oil seal.
2. Apply a generous coating of Pac-Ease
Rubber Emulsion (or equal) to the O-ring
on the outside of the stationary seat.
3. Press the stationary seat into the pump
head. Use the disk from the seal packag-
ing to push the stationary seat in place.
Without touching the running face, make
sure the stationary seat is seated in the
bore.
4. Apply a coating of general-purpose grease
to the gasket and align gasket on the pump
head.
5. Install the pump head on the gearbox,
being careful not to damage the oil seal,
stationary seat and pump shaft.
6. Apply Loctite 246 (or equal) and install the
four 7/16-14 x 1-1/4" cap screws and
washers to secure the pump head to the
gearbox.
Tighten cap screws to 40 ft.-lb. (54.2 N-m).
7. Install impeller and pump body.
Pump Body Installation
See Figure 15: "Pump Body and Impeller
Assembly" on page 32.
1. If required, remove worn clearance ring
then press a new clearance ring into the
pump body.
2. Apply a light coating of grease to the
gasket and align on the pump head.
3. Install pump body to the pump head being
careful not to damage clearance ring and
impeller.
4. Apply a coating of Loctite 246 (or equal)
and install the twelve 7/16-14 x 1-1/4" cap
screws and washers.
5. Reinstall the 1/4" NPT pipe plug.
PUMP SHAFT
See Figure 18: "Pump Shaft Assembly" on page
36.
To remove the pump shaft and related compo-
nents, you must first remove the pump body and
impeller. See heading "Pump Body/Impeller" on
page 32.
Removal
1. Remove pump body, impeller and pump
head. See previous heading "Pump Body /
Impeller," beginning on page 32.
2. Unscrew speed counter and fitting. Pull
spring pin from the pump shaft.