Thomas Industries Rietschle Thomas MACRO VTB 180 Instrucciones De Uso página 7

Maintenance and Servicing
When maintaining these units and having such situations where person-
nel could be hurt by moving parts or by live electrical parts, the pump must
be isolated by totally disconnecting the electrical supply. It is imperative that the
unit cannot be re-started during the maintenance operation.
Do not maintain a pump that is at its normal operating temperature as there is
a danger from hot parts.
1. Lubrication (pictures to
The lubrication points are (L); lubrication periods are as follows, but the minimum is
once a year:
Operating hours
Model 50 Hz
VTB 180 6.000
VTB 250 6.000
VTB 340 6.000
VTB 500 6.000
Note! These greasing instructions are valid for operation at 20° C ambient
temperature. At 40° C these should be reduced by 50 %.
We recommend the following grease types: Klüber PETAMO GY 193 or other equal
greases (see label of recommended greases (M)).
2. Air filtration (picture )
The capacity of the pump may be reduced if the air inlet filters are not maintained correctly.
The filter cartridges (f) of the suction filter (S) have to be cleaned monthly and replaced once a year (under extreme conditions, more regularly).
Changing the filter: Loosen thumb screws (g). Take off filter cover (h) complete with gasket. Remove filter cartridges (f) and clean or exchange. Re-
assemble in reverse order.
3. Blades (pictures , and
Checking blades: The models VTB have 5 blades which have a low, but permanent, wear factor.
First check after 2,000 operating hours, thereafter every 500 operating hours.
Remove end cover (e). To remove the housing cover (b) from the housing the bolt (a) located in the centre of the bearing cover (c) should first be
removed. To achieve this, one of the fixing bolts (s) from the housing cover should be screwed into the thread in the centre of the bearing cover (c).
Remove the blades (d) and check. All blades must have a minimum height (X) of:
Model X (minimum hight)
VTB 180 40 mm
VTB 250 52 mm
VTB 340 57 mm
VTB 500 57 mm
All blades must be changed at the same time.
Note! The VTB 500 has 2 blades per slot.
Changing blades: if the minimum height (X) is reached, then the whole set of rotor blades should be changed.
Before re-fitting the blades, blow out the housing and the rotor slots. Place the blades with the radius outwards (Y) such that the bevel is in the
direction of rotation (O ) and corresponds with the radius of the housing (Z).
1
Before re-fitting the housing cover (b), re-distribute the grease from the bearing cover (c) on to the appropriate bearing. It is important that the shaft
end is completely clean so that no grease can enter the housing, as this could mix with carbon dust and give a viscous paste which would result
in the blades becoming stuck in the rotor slots.
Note! Care should be taken that the bearing should not become contaminated.
When re-fitting the housing cover (b), tighten the bolts evenly so that the end cover fits correctly onto the fixing points. When the end cover is almost
touching the housing we recommend moving the fan in both directions whilst further tightening the bolts. This can be achieved by removing the motor
fan cover. This then ensures that the blades are sitting correctly in their slots and avoids any edge damage. Re-fit the end cover (e).
)
60 Hz every bearing
5.000
4.500
6.000
5.000
)
d
Grease
g
8 g
8 g
10 g
10 g
b e
s
h
Z
O
1
S
f
Y
X