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A.0500.751 – IM-TGBLOC/01.00 EN (10/2020)
3.20.3.1 Nuts and bolts
Nuts and bolts showing damage or parts with defective threading must be removed and replaced
with parts belonging to the same fixation class as soon as possible.
• Preferably use a torque wrench for tightening.
• For the tightening torques, see table below.
Bolt
Ma (Nm)
8.8 / A4
Plug with
edge and flat
seal
Ma (Nm)
M6
10
G 1/4
20
M8
25
G 1/2
50
M10
51
G 3/4
80
M12
87
G 1
140
M16
215
G 1 1/4
250
M20
430
M24
740
M30
1500
Plug with edge and elastic washer
3.20.3.2 Plastic or rubber components
• Do not expose components made of rubber or plastic (cables, hoses, seals) to the effects of oils,
solvents, cleaning agents or other chemicals unless they are suitable.
• These components must be replaced if they show signs of expansion, shrinkage, hardening or
other damage.
3.20.3.3 Flat gaskets
• Never re-use flat gaskets.
• Always replace the flat gaskets and elastic rings under the plugs with genuine spares from
SPX.
3.20.3.4 Filter or suction strainer
Any filters or suction strainers at the bottom of the suction line must be cleaned regularly.
Note!
A clogged filter in the suction piping may result in insufficient suction pressure at the inlet.
Clogged filter in the discharge line may result in higher discharge pressure.
3.20.3.5 Anti-friction bearings
TG BLOC pumps are equipped with 2RS ball bearings which is grease packed for life. It does not
require periodically greasing.
3.20.3.6 Sleeve bearings
We recommend checking the pump regularly for wear on the gear wheels and sleeve bearings to
avoid excessive wear of other parts.
• A quick check can be done by using the front
pull-out and back pull-out system.
See table for maximum allowable radial clearance
of the sleeve bearings.
• For replacement of the sleeve bearings contact
your local supplier.
3.20.3.7 Shaft seal – Mechanical seal
If the mechanical seal leaks excessively, it must be replaced with one of the same type.
Note!
The materials of the mechanical seal are selected strictly in accordance with the nature of the
pumped liquid and the operating conditions. Thus the pump must only handle the liquid for which it
was purchased. If the liquid or operating conditions are changed, a mechanical seal suitable for the
new operating conditions must be fitted.
TG BLOC pump size
Maximum allowed
radial clearances
15-50 to 23-65
0.15 mm
58-80 to 86-100
0.25 mm
