Product Manual A

Maintenance
31609 A MTP4000-6000DZV/DZD Operating Manual 57
CAUTION
Care should be taken when removing lockscrew to prevent damaging the screw head.
2. If the breaker bar will not loosen the impeller lockscrew, apply heat to the lockscrew for 2-4 minutes. Do not
exceed 400°F (204°C).
WARNING
Care should be taken when applying heat so as not to receive serious burns.
3. Allow lockscrew to cool and remove with a breaker bar.
FRAME DISASSEMBLY AND ASSEMBLY
Disassembly
1. Remove the deflectors from the shaft.
2. Remove the drive end shaft key.
3. Remove the capscrews from the bearing cover or drive end bracket.
Note: Grease lubricated frames have a single lip seal at the drive end pump ends. If the lip seals are to be saved,
the shaft should be cleared of burrs or sharp protrusions which would cut the seal. If the seals are removed or
replaced, refer to Figure 21 or Figure 22 for orientation of the lips. Paired seals have a grease passageway between
them and are arranged so that the grease will move through the inner and outer seal.
4. Slide the bearing cover or drive end bracket off the shaft. Remove the capscrews from the pump bracket.
Slide the pump bracket off the shaft.
5. The shaft and bearings can now be removed by pressing on the drive end of the shaft.
6. Remove the bearings from the shaft with a bearing puller. If the bearings are to be saved, keep them abso-
lutely clean. If contaminated, wash only in clean fluid.
CAUTION
Never hammer the shaft or parts attached to the shaft or you will damage both the shaft and
the bearings.
Assembly
1. Press the drive end and pump end bearings onto the shaft. Pressure should be applied to the inner race.
2. Press the shaft into the frame through the drive end until the pump end bearing is approximately flush with
the pump end of the frame.
3. Install the pump end lip seal(s) into the bracket. Slide the pump bracket over the shaft, taking care not to
damage or fold the lip seal(s). Install and tighten the capscrews.
4. Install the lip seal(s) in the bearing cover or drive end bracket. Reinstall the shims in the drive end of the
frame (if present when disassembled). If new shaft, bearings, frame, bearing cover or drive end bracket are
being installed, insert shims to maintain 0.007-0.012 in. (0.177-0.304 mm) shaft end play. Slide the bearing
cover or drive end bracket over the shaft. Install and tighten the capscrews.
5. Install the defector and lubricate. Refer to “Lubrication Instructions” on page 58.