Sundyne LMC 341F, Instruction And Operation Manual

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NOTE:
Steps 5d-5g serve to check that all stacked components are tight and not loose during
assembly. There is no way to check these stacked components with the seal housing
installed. Since the impeller to shaft fit is not a loose or slip fit, it is possible to assemble the
stacked components and achieve the required torque, even though the stacked components
could remain loose and free to turn in relation to the shaft. This could lead to component
damage if allowed to operate in this condition.
5h.
Remove the impeller (2).
5i.
Remove all stacked components, except the gearbox mating ring (51D).
5j.
Reinstall the same components, only this time, include all O-Rings, mechanical seals, the seal
housing (30), and the impeller spacer (158C). Leave out the 936G O-Ring between the impeller
bolt (3) and the impeller. Place a soft metal washer between the impeller bolt and impeller to
prevent galling while torquing the impeller bolt.
5k.
Before installing the diffuser cover (15), remove the o-ring (936E) from behind the diffuser cover,
then install the diffuser cover, without the o-ring, on to the seal housing (30).
5L.
Reinstall the impeller using the same procedure described in step 5e above.
5m.
Measure the distance between the top of the impeller shroud and the diffuser cover (15) per
(Figure 5.1) . The impeller shroud should extend .000-.030” beyond or above the diffuser cover
(with the gearbox upside down). This is the “E” dimension in (Figure 5.1). If the shroud height is
measured out of tolerance, determine the correct impeller spacer thickness and replace it with
one of the correct size to ensure the proper shroud height (“E” dimension).
Table 5.3
Part Number Thickness
SP01AD02XXF 0.018”
SP01AD02XXA 0.030”
SP01AD02XXG 0.040”
SP01AD01XXB 0.050”
SP01AD01XXH 0.060”
SP01AD01XXC 0.070”
SP01AD01XXD 0.090”
SP01AD01XXE 0.110”
SP01AD01XXJ 0.020”
5n.
Remove the impeller (2).
5o.
Remove the diffuser cover (15), reinstall the diffuser cover O-Ring (936E) behind the diffuser
cover, and reinstall the diffuser cover, with O-Ring, onto the seal housing.
5p.
Install the impeller spacer (158C) with the correct thickness and the o-ring (936G) between the
impeller spacer and the impeller.
5q.
Install the impeller (2) as described in step 5 above.
5r.
Recheck the alignment of the impeller (2) shroud to the diffuser cover (15); i.e., Dimension “E” in
Figure 5.1.