CiDRA SONARtrac PW VF-100 - Manual (Page 56)

20831-01 Rev 05 Page 5-38
Refer to the following figure. Align the center alignment holes on the
sensor cover. Install a 3” long 3/8” diameter alignment bolt, with
washer under the bolt head, in center holes on both sides of the cover.
Install a washer and nut on the alignment bolts. Install a 5/16”-18 x
1.5” tin plated 316 SST bolt with washer into each of the 12 cover bolt
holes in the upper cover.
Figure 43 Sensor Cover Bolt Installation
Tighten the alignment bolts 2 – 3 turns alternating between both sides
of cover until the cover bolts protrude through the lower cover
assembly. Note: Use of the alignment bolts may not be necessary if
the cover bolts and nuts can be made up.
Place a washer, lock washer and nut on the end of the sensor cover
bolt once it is through both halves of the cover and begin drawing the
cover halves together using the cover bolts. It is no longer necessary
to use the alignment bolts to draw the cover halves together.
Continue tightening the sensor cover bolts 1 - 2 turns in the tightening
sequence shown in the figure below. The gasket on the cover will
compress and the cover assembly halves will pull together. Tighten
the cover bolts until the two halves of the cover are drawn together so
that there are no gaps along the axis of the cover. Note: There may
be some small gaps in the cover halves between the bolt locations.
This is normal and does not affect operation or seal effectiveness.
Alignment
bolts
(2 places)
Cover bolt
assemblies
(12 places)
Upper cover
assembly
Lower cover
assembly
Bolt
Washer
Lock washer
Washer
Nut
Transmitter cable connector
socket
Cover bolt
assembly