Convert Pump from Behind the Rotor to Stuffing Box Component Mechanical Seal - 4127C & 4227C Series™

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***Download the Technical Service Manual here: vp.salesmrc.com/item/12498
0:00 Introduction
0:30 Disassembly
3:15 Bushing removal & installation
4:05 Reassembly
5:48 Seal installation and final assembly
In this video we will guide you through the conversion from a behind the rotor seal to a component mechanical stuffing box seal in Viking Pump’s stainless-steel pumps - with U-Plus™ bracket and ProPort™ casing. To more or to see other repair videos, please visit our website at VikingPump.com.
This video applies to these pump models:
H4127C HL4127C K4127C KK4127C L4127C LL4127C
H4227C HL4227C K4227C KK4227C L4227C LL4227C
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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 head Cap screws.
Remove the head by tilting it backward to prevent the idler from falling off the idler pin.
Remove and discard the head gasket.
Remove the rotor shaft. A soft-headed hammer may be used to tap on the end of the shaft to aid with removal.
Loosen the four rotary seal face set screws.
Remove and discard the rotary seal face.
Next, using a tool or piece of pipe that is similar in diameter, carefully rock the stationary seal out of the bore. Discard the seal.
Remove the seal washer.
Using a screwdriver and soft-headed hammer, carefully tap out the lip seal.
Loosen and remove the casing cap screws and remove the casing.
Remove and discard the bracket gasket.
Clean out any old grease from the bracket.
Remove the grease relief fitting and grease zerk.
At this point, the bushing will need to be removed and new bushing installed in the stuffing box seal position.
Using a hydraulic press, carefully press out the old bushing.
When installing use care to avoid breaking or damaging the carbon graphite bushing.
Install the bracket gasket. Apply appropriate gasket sealant to the bracket and ensure even coverage on both sides of the gasket.
Install the casing.
Lubricate and install the rotor shaft.
Install any required suckback or flush lines, by first removing the appropriate plugs. Then using appropriate thread sealant install elbow fittings. Install the line.
Install the head gasket. Apply appropriate gasket sealant to the head and ensure even coverage on both sides of the gasket.
Install the idler onto the idler pin.
Install the head. Ensure that the relief valve is oriented toward the suction port.
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.