1. Deck mounting flange is attached to the bottom of the Sight Glass by two bolts. Remove these bolts and save them. You will have (12) 1/2" - 20 x 3/4" stainless steel mounting bolts. Store the Sight Glass upside down until you are ready to reassemble it to the deck flange. Failure to do so may result in damaged glass because the wiper flange extends below the bottom glass flange.

NOTE: Use 1/8" diameter welding rod for the installation. Set welder to approximately 125 amps.
For MIG use 0.045 wire at 190-195 amps.

2. Tack weld the deck mounting flange in place as shown in steps 1 and 2 on page G-8. Do not clamp it to the deck in any way prior to tack welding. Please take all possible precautions to preserve this flatness and surface condition during the weld. Finish by welding the inside perimeter and the outside perimeter of the flange as shown in step 3 on page G-8. Failure to follow this welding procedure can result in a warped flange that may not seal.

3. With the mounting bolts provided, sandwich the Teflon™ mounting flange gasket between the bottom of the Sight Glass and the top surface of the deck mounting flange. Rectorseal T Plus 2, or Teflon™ enriched sealant, may be applied to the Teflon™ mounting flange gasket to insure that there are no leaks. Install all (12) mounting bolts finger tight and proceed to tighten them in an opposite rotational pattern to a torque of 12 foot pounds.

4. The Full View Model SGM-1 Sight Glass should be mounted adjacent to the cargo control valve handwheel, with an unobstructed view of the sump and the ladder or gauge tree. NEVER mount the Sight Glass over an internal frame which blocks the view through the Sight Glass.

If you have any questions regarding installation contact ERL at 812-948-8484.