Proper Gapping Of Pump - PROCESSTEC ViscoTwin 130 G8 Operation & Maintenance Manual

4.5.8 Proper Gapping of Pump

In case foreign material entered the pump housing and
blocked the spindles, the gear synchronization lock
ring (Pos. 2515) might have slipped. The "S" clearances
between the spindles shifted to the extent that the
spindles touch and block each other. In this case the
pump needs to be gapped.
Gapping means that the "S" clearances between the
spindle flights need to be evenly distributed while
turning the driven shaft into the "middle position".
Successful gapping results in the "S" clearances
measuring all the same (S10, S20, S30, S40).
STEP 1a)
In case your pump is equipped with the Gear
Housing Inspection Port (only available as an
option on the Stainless Steel versions of the
ViscoTwin
Pumps), the Socket Head Cap Screws
(Pos. 2186) can be loosened while turning the
shaft by hand on the spindles.
STEP 1b)
In case your pump is not equipped with the Gear
Housing Inspection Port, the Gear Housing (Pos.
2172) needs to be removed in order to gain access
to the Socket Head Cap Screws (Pos. 2186) for the
Gear Synchronization Lock Ring (Pos. 2515).
• Remove the Pump Coupling Hub (Pos. 2247).
• Remove the Key (Pos. 1183) on the Drive Shaft
by using Ear Clamp Pliers.
• Drain the Oil.
• Loosen the FOUR (4) bolts (Pos. 2258) on the
Gear Housing.
• Carefully slide down the gear housing.
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4. MAINTENANCE
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