Donaldson Torit Dust Collector UMA 103

Every 1000 working hours the following parts should be checked:

2) Rubber seals – for tears and over-compression.

3) Shaker mechanism with particular attention to:

- Broken locators on shaker bar.

- Torn shaker bar support strap(s).

Warning: This inspection requires trained personnel with PPE!

Any abnormal change in pressure differential across the filter assembly?

Enter the filter resistance in mm WG

For UMA 750 collectors, a resistance of 125 to 175 mm WG may be expected.

Is the secondary or absolute filter monitor functioning properly?

Are door fastener threads lubricated?

Check the condition of the ignition minimising fan's lining

Sign off on the dust collector inspection

Warning: Ensure you are wearing appropriate PPE before starting the procedure.

Open secondary/absolute filter door.

UMA 40MM – Lift bar to release sealing mechanism.

UMA 100-450 – Undo clamping nuts or clips as appropriate and remove retaining mesh or frame.

UMA 750 – Undo clamping nuts sufficient to allow element removal.

Remove used element, place it directly into a plastic bag and then seal the bag.

Slide the new element into the housing, with the element seal against the secondary/absolute filter seal frame, until it reaches the backstop.

Clamp element in position using the arrangement provided.

Close secondary/absolute filter door.

Pressure drop across the filter assembly

Record the figure in the log book

Pressure drop increased significantly over two or three successive checks?

If the pressure drop increases significantly, check the filter.

Pressure drop across the secondary or absolute filter (if fitted)

Pressure drop across the secondary or absolute filter reached 100 mm W.G.?

If the pressure drop reaches 100 mm W.G., change the filter.

Unimaster collectors fitted with an explosion relief assembly inspected?

Bursting panels are intact and clear of obstruction?

Isolate electrical supply and remove fan chamber lid

Disconnect electrical wiring to terminal box

Remove the four bolts securing the motor drive bed-plate and withdraw the complete assembly from the unit case

Loosen, but do not remove, the four socket screws in the base flange and withdraw drive cover

Remove the six nuts securing flange of bearing housing to the bed-plate and withdraw the housing

Remove fan pulley and the six bolts securing the fan case

Remove fan impeller and fan case

Remove end caps and spacers from fan bearing housing