BOMBAS IDEAL RNI Series Use And Maintenance Instructions page 29

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Bombas Ideal, S.A.

OIL LUBRICATION

Oil-lubricated pumps should have the oil completely renewed after the first two hundred hours' operation. The

following changes should be made every 1.000 hours' service or at least once a year when ambiance temperature

is under 50º C. For temperatures over 50º C reduce the periods at which oil is replaced.

TAKE NOTE

11.

ASSEMBLY AND DISMANTLING

If the pump needs to be dismantled to carry out any maintenance or repairing, proceed as described below.

Attached to the name of the different parts you will have the reference number as described in the sectional

views of this manual and in the parts list book.

It is quite often that pump casing nº 379 does not need any repairing, so it can be left on site, connected to

suction and delivery pipes. Drain all the liquid from the pipelines and pump casing by removing the pump drain

plug nº 42. Also proceed to drain out the oil on oil-lubricated supports removing the support drain plug nº 41

on the bearing support nº 789.

Remove motor from bed plate to leave room enough and dismantle the rotating parts of the pump. When pump

has a coupling with spacer, you will obtain the necessary room simply by removing the spacer, without moving

the motor.

Loose screws nº 51 (in the RN supports N-250, N-400 and N-500) that secure the casing cover nº 812 to pump

casing nº 379; for RNIs you have to loose stud-nuts nº 96. You can then dismantle the sub-assembly consisting

of the bearing support nº 789 with the casing cover nº 812 and the impeller nº 726.

To disassemble the impeller nº 726, loose the stud bolt and the impeller nut nº 828 (RNs series). For RNIs, loose

the impeller nut nº 828 and remove the impeller ring nº 236. The impeller key nº 22 should be kept in a suitable

place to be protected from blows and rust.

To dismantle the mechanical seal nº 63, you have to release screws nº 33 on RN pumps or stud-nuts nº 95 for

RNIs, that fix the bearing support nº 789 to the casing cover nº 812. To dismantle packing on RNs, you should

remove the packing gland nº 653, the packing nº 32 and the casing cover nº 812 itself.

Remove screws nº 34 from both bearing covers nº 810 and 811, and dismantle them. Remove the shaft nº450

with the bearings nº 29 and 30 from its housing in the support bearings nº 789. Remove the bearings from the

shaft in the normal way.

All the parts must be treated with great care, greasing these and putting them away in a suitable place until

these are assembled again. For cleaning the bearings and their housings you should use petrol, benzol or a

Rn series