Multitech 1777.8/7-10 G3 Oil quality / Oil change, Motor, Shaft seal Mechanical seal, Coupling

Multitec

Oil quality / Oil change

Quality: ISO VG 46.

The first oil change shall be carried out after 300 operating hours, the following ones every 3000 operating hours. Unscrew the screwed plug in the re-fill hole and in the drain hole. Allow the bearing housing to drain completely, then plug the drain hole again.

Fig. 16 Oil fill

Hinge down the constant-level oiler 638.

Pour in the oil through the hole after having hinged down the reservoir of the constant-level oiler until oil appears in the vertical portion of the connection elbow (Fig. 16). Then fill the reservoir of the constant-level oiler with oil and snap it back into operating position. After a short time check whether the oil level in the reservoir has dropped.

It is important to keep the reservoir two thirds full at all times!

Lubricant quantities

Grease quantities

Pump size		Quantity per bearing unit in g
		Drive end	Non-drive end
32		-	-
50	/ 65	15	-
100	/ 125	25	15
150		40	30

Note: On some pump designs the rolling element bearings are lubricated for life. These pumps are not provided with a lubricating nipple on the bearing bracket.

Oil quantities

Pump size	Oil quantity in ml *)
	Drive end	Non-drive end
32	330	330
50	500	330
65	490	510
100 / 125	880	920
150	1000	1040

*) oil quantity without oil fill in the reservoir of the constant-level oiler

Motor

Motors without lubricating nipple: The rolling element bearings have been lubricated in the supplier’s factory for an operating period of 15,000 h or 2 years under normal operating conditions.

Motors with lubricating nipple: The rolling element bearings must be re-lubricated at the intervals indicated on the motor name plate (approx. 500 h).

7.2.3Shaft seal

Mechanical seal:

The mechanical seal is maintenance-free.

Gland packing:

The nuts at the gland cover must only be tightened slightly. The gland cover must be at right angles to the shaft. After the pump has been primed and prior to start-up, make sure the gland packing is set to allow a larger amount of leakage. After approximately 1 operating hour, tighten the nuts at the gland cover gradually until leakage has been reduced to individual drops (approx. 7 l/H).

7.2.4Coupling

If the flexible coupling elements begin to show signs of wear, they must be replaced in due time and pump/motor alignment must be checked.

7.3Dismantling

If you need additional information or instructions please contact KSB’s customer service !

7.3.1General instructions Drainage / Cleaning

If the pump was used for handling liquids posing health hazards, see to it that there is no risk to persons or the environment when draining the fluid. All relevant laws must be heeded. If required, wear safety clothing and a protective mask! The flushing liquid used and any liquid residues in the pump must be properly collected and disposed of without posing any

risk to persons or the environment.

7.3.2 Preparations for dismantling

Caution Make sure to switch off the pump unit before starting any dismantling activities. Secure the

pump so as to make sure it cannot be switched on accidentally ! The shut-off valves in the inlet / suction and discharge pipes must be closed and secured against inadvertent opening.

The pump must have cooled down to ambient temperature. Pump pressure must have been released and the pump must have been drained.

Noxious, explosive, hot or other hazardous fluids shall be drained without posing any risk to persons or the environment. We strongly recommend to flush the pump after drainage.

Flushing and cleaning the pump is an absolute necessity before sending the pump to the workshop. In addition, the pump must be supplied with a cleaning certificate.

After a prolonged period of operation the individual components may be hard to pull off. We recommend to use a brand name penetrating agent or a suitable puller.

Under no circumstances use force.

Dismantling must only be carried out in accordance with the sectional drawings at the end of these operating instructions. (see section 9 ”General assembly drawings”)

Heavy components must be sufficiently supported during dismantling. The components shall be marked with their sequence of dismantling, to make sure they will be re-assembled in the correct sequence.

Thoroughly clean all dismantled components and check their condition. Careful examination may help to find the cause for pump failure, if any. If in doubt, replace the components. Always replace parts which are subject to wear (gaskets, O-rings, casing wear rings, rolling element bearings).

15