Convert Pump from Packing to a Mechanical Seal with the U-Plus™ Bracket
**Download the Technical Service Manual here: https://vp.salesmrc.com/item/12498
In this video we will show you how to convert from packing to a mechanical seal in the stuffing box in a Viking pump with the U-Plus™ bracket. To more or to see other repair videos, please visit our website at VikingPump.com.
This video applies to these pump models:
H127C HL127C K127C KK127C L127C LL127C LS127C Q127C QS127C
H227C HL227C K227C KK227C L227C LL227C LS227C Q227C QS227C
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Welcome, in this video we will guide you through the conversion from packing to a component mechanical seal in the stuffing box in Viking Pump’s stainless steel pumps – with U-Plus™ bracket and ProPort™ casing. This video applies to these pump models…
Before you begin, please consult the appropriate technical service manual for safety information. A copy of the latest revision can be found on our website at vikingpump.com.
To begin, remove the stainless steel window guards from the bracket.
Next, bend up the tang of the lock washer.
Place a brass or hardwood bar into the port opening to keep the pump from turning.
Loosen and remove the locknut. Remove and discard the lock washer.
Loosen the bearing housing set screws.
Loosen and remove the bearing housing.
Remove the bearing spacer collar. The collar may have come out the bearing housing.
Remove the half round rings.
Loosen and remove the packing gland locknuts. Remove the packing gland. Remove the T-bolts.
Using a packing hook, remove each packing ring. Remove the packing retainer washer and internal retaining ring.
Before installing the new seal, ensure the shaft is free of any debris or wear.
Install any required suckback or flush lines, by first removing the appropriate plugs. Then using appropriate thread sealant install elbow fittings. Install the line.
Remove the seal access hole plug.
Install the seal installation sleeve with the taper toward the end of the shaft.
Lubricate the shaft and install the rotary member of the mechanical seal.
Remember to remove the seal installation sleeve.
Before reaching the bracket bore, remove the four seal clips to engage the seal. Finish installing the seal until the set screws line up with the seal access hole in the bracket. Insert a hex head wrench into a set screw to keep the seal from sliding moving as you complete the rest of the installation.
Next, place the PTFE gasket around the stationary seal seat and slide onto the shaft.
Install the gasket into the seal holder and slide onto the shaft. Insert the T-bolts and install the locknuts, but do not fully tighten at this time.
Install the half-round rings. Install the bearing spacer collar over the half round rings.
Install the bearing housing and fully tighten until the shaft will not turn. This point is known as zero end clearance.
Install the lock washer by aligning the tab through the slot in the shaft.
Install the lock nut. Place a brass or hardwood bar into the port opening to keep the pump from turning. Torque the lock nut to the appropriate torque setting. This setting can be found in the technical service manual.
Remove the brass bar.
Bend a tang of the lock washer into a slot of the lock nut. If no tang aligns, continue to tighten the lock nut until one does. Failure to tighten the locknut or engage the lock washer tab could result in early bearing failure and cause damage to the rest of the pump.
Now set the end clearance. The end clearance setting can be found in the technical service manual.
Please refer to our video “Setting End Clearance” for details on this procedure.
You can now set the seal.
Confirm that the seal set screws are aligned with the seal access hole. Tighten each set screw until it just contacts the shaft. Then fully tighten each set screw.
Next, fully tighten the seal holder lock nuts.
Turn the shaft to ensure the pump turns freely.
Using appropriate thread sealant, install a plugs into the seal access holes.
Reinstall the window guards. Ensure that the retaining washer is placed between the guard and bracket faces.
Finally, grease the bearing housing until grease begins to appear around the lock washer.
Your pump has now been converted from packing to a stuffing box component mechanical seal and is ready to be put back into service. For more information or to view other service videos, please visit our website at vikingpump.com.
