Bucher Municipal
V Range
Routine Maintenance
141
V50 • V65 • V80 Operator’s Guide
Suction Fan Impeller and Casing
If the impeller is subjected to excessive wear, disintegration could occur whereby the front shroud
plate detaches itself from the driving plate as a result of the high rotational forces. Any wear
occurring to the impeller is usually shown up as a thinning of the blades generally in a broad
wear pattern (A). Once apparent thinning of the impeller blades is observed, the impeller must be
replaced when any blade thickness (D) is less than 2mm. If perforation of the fan case is observed
(B) due to wear erosion, this should also be replaced.
In operation the impeller and casing can be subjected to wear in the form of erosion resulting
from dust or small abrasive particles passing through the fan system and must be inspected in
accordance with the Weekly Maintenance Schedule.
In cases where excessive dust could pass through the system, these inspections should be made
more frequently, the blades should be clean of any debris (C) to prevent dirt build up and premature
failure due to vibration.
Vt - Twin Engine
Vh/Vm - Single Engine
WARNING
The fan impeller is finely balanced as an assembly in manufacture.
NEVER remove or replace the hub.
DANGER
Ensure the engine is not running and isolated before fan maintenance or replace-
ment is attempted.
WARNING
The fan impeller is finely balanced as an assembly in manufacture.
NEVER remove or replace the hub.
DANGER
Ensure the auxiliary engine is not running and isolated before fan maintenance or
replacement is attempted.
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