Impeller Clearance - WACKER Group PT 6LT Operator's Manual

Maintenance

5.14 Impeller Clearance

See Graphic: wc_gr003206
5.14.1 Shut down the machine.
WARNING
5.14.2 Open the bottom drain cover and drain the pump.
5.14.3 Remove the suction flange (a) and the flapper gasket (b) from the front
CAUTION
5.14.4 Clean the impeller (d) with a 50-50 mixture of bleach and water before
5.14.5 Reach inside the pump through the suction port, and use a feeler
5.14.6 If necessary, add shims (f) between the insert and the impeller cover
5.14.7 Reinstall the suction flange and the flapper gasket.
wc_tx000567gb.fm
Sand, dirt, and debris will cause the impeller to wear. If the pump's
performance drops over time, check and adjust the clearance between
the impeller and the insert.
DO NOT reach into or insert anything into the pump while the engine
is running!
DO NOT run the pump with the impeller cover removed.
of the pump.
Impeller edges can become extremely sharp; use care when working
on the pump to reduce the risk of being cut.
working on it.
gauge (c) to check the gap between the impeller and the insert (e). The
pump will operate most efficiently when the gap is maintained between
0.15–0.75 mm (0.005–.025 in.). Larger gaps are allowable but may
reduce pump output slightly.
(g) to decrease the gap between the impeller and the insert. The insert
is attached to the back side of the impeller cover. To add shims:
• Remove the impeller cover.
• Remove the screws that secure the insert to the impeller cover.
• Add shims as required and recheck the clearance gap.
• After the proper shimming has been determined, use a high-
strength threadlocking compound on the screws and secure the
shims and insert to the impeller cover. Torque the screws to 26
Nm (19 ft.lbs.).
38
PT 6 /...