MDX [en-US]
45
Apply general purpose lithium-based grease to the surface of the liner to be in contact with the gasket.
Install Teflon lined snap ring gasket (40-2 or 40-2.01) over liner (13-19),
Install gasket over greased surface of liner (13-19).
Install suction plate assembly onto the pump casing per standard procedure.
Install gaskets 400.06. The purpose of these gaskets is to protect the suction plate after liner is adjusted.
Apply a coating of RTV (Room Temperature Vulcanizing Silicone Sealant) to one side of each gasket.
Apply RTV coating to suction plate flange face, suction liner face, and pipe flange face. Attach coated side of 400.02
gaskets to suction pipe and suction flange. DO NOT apply RTV to surface between the two 400.06 gaskets.
Install Suction Piping, and allow RTV to fully cure before adjusting liner.
1
Teflon Lining
2
Grease
3
Apply RTV between pipe flange & gasket
4
Apply RTV between suction liner and gasket
It is important that excessive force is not placed on the liner by using a raised face flange or a gasket that covers the
liner protrusion only. In general it is recommended that a full face flange and full face gasket is used to connect the
suction piping.
Correct flange gasket installation
Inproper flange gasket
installation
1
Suction Liner
2
Flange Gasket
3
Flange
10.3.6 Snap Ring Gasket
When installing snap ring gaskets, always check to ensure that there is a gap behind the back vertical surface of the gasket. If
this is not the case, the gasket should be removed and turned inside out. The back vertical surface of the gasket should taper
forward 10° to form this gap.
The pump casing side opening is tapered at 10°. As the nuts are tightened there is a ball joint action. Because of this, opposite
nuts should be tightened in an alternating pattern and alignment maintained as parts are pulled into place. Visual accuracy of
alignment is sufficient.
For longer life, the suction liner may be rotated 180° at approximately half life. It is best to replace the snap ring gasket when
this is done or when parts are changed. This will ensure better parts life since a partially worn snap ring gasket will not adequately
protect the adjoining metal parts. If the snap ring gasket is not badly worn, it may be possible to reuse it by placing something
behind its back vertical surface so that after installation, the gasket protrudes into the casing. The protruding gasket should wear
off leaving a smooth joint. If the snap ring gasket does not protrude, the resulting gap between metal parts will cause turbulence
and result in accelerated wear.
16-1
40-2(.01)
1
2
3
4
1
2
3
1
2
3
Summary of Contents for GIW MDX
Page 53: ...MDX en US 53 14 Notes...