Dover PSG Mouvex AZ O Pengoperasian & Pemeliharaan Instalasi - Halaman 9

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THE CYLINDER/PISTON AND BUSHINGS (continued)

WARNING

The weight ot the parts

can be dangerous and

may provoke bodily inju-

ries

or material damages.

4.1 Necessary tools

• 7 - 8 - 30 open-end spanner

• 19 socket spanner

• adjustable spanner

• 1 plastic mallet

• 1 flat screwdriver

• 1 tube for assembling the bearings

4.2.1 To remove front cover

Remove front cover screws 410.

Remove the front cover 401 by progressively separating

it from the pump body and with it the piston 301, the

shaft and the mechanical seal (shaft part).

NT 1003-A00 09 18 AZ O e

4. OPENING THE PUMP TO INSPECT

BE CAREFUL WITH THE WEIGHT OF

THE PARTS WHEN THEY ARE BEING

REMOVED.

4.2.2 To remove piston

Remove the piston 301 by pulling it along the shaft 501.

4.2.3 To remove mechanical seal and shaft

Remove the mechanical seal and the shaft by following

the directions § MECHANICAL SEAL.

Reassembly is done in the reverse order than the dis-

mantling.

Take the following precautions :

• Check the condition of the mechanical seal (see §

MECHANICAL SEAL).

• Check the condition of the spring 504 and the piston

bearing (mini length in the rest : 13,5 mm). Light load

must be applied to the spring in order to insert the

piston 301 into the cylinder 201.

• Check also that the piston backsprings 310 (mini

length in the rest : 22,5 mm).

• Before refitting the front cover 401, do not forget to

refit the front cover seal 403 after making sure it is in

good condition.

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