Hamilton Jet HJ212, Инструкция по установке и обслуживанию

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Installation and Service Manual
Overhaul
Hatch Extension
Refer to drawing: HJ21210004 Hatch Extension.
C.W.F. Hamilton & Co Ltd can supply an inspection hatch extension [1] as an optional extra. This item enables
work to be carried out on the jet unit where, by removing the inspection hatch cover, this may allow water to
enter the vessel. The hatch extension raises the height of the inspection hatch by approximately 140mm.
Inspection Covers
Extreme care is required whenever inspection covers are removed, as water may enter the
vessel through these openings.
Inspection cover nuts should not be fully removed until the inspection cover has been
loosened, so that if the water level is higher than expected, the inspection cover can be re-
secured.
Never leave inspection covers removed without continuous monitoring of the water levels.
Hatch Extension Fitting
To fit the inspection hatch extension [1] carry out the following operation:

Make sure that the water level is below the level of the intake inspection hatch. If necessary, ballast the
bow end of the vessel so that water will not enter the vessel through the inspection hatch when the
cover is removed.

Remove nuts [23] and spring washers [22] from the two studs [21] retaining the inspection hatch cover
[20].

Remove the inspection hatch cover [20] and o-ring [34].

Check the o-ring [34] and replace if damaged or distorted.

Smear o-ring [34] with grease and refit to the o-ring groove in the inspection hatch cover [20]. Refer to
drawing: HJ21210004 Hatch Extension.

Ensure that o-ring [2] on the base of the inspection hatch extension [1] is not damaged or distorted.

Smear the o-ring [2] with grease and refit to the hatch extension [1].

Fit the hatch extension over the 2 studs [21] in the intake.

Secure the hatch extension to the studs [21] on the hatch opening, with spring washers [22] and nuts
[23].

Fit the inspection cover [20] to studs [3] and secure with spring washer [5] and nut [4]. Torque load to
the recommended torque.

Tighten nuts to the specified torque. Refer to section: Tightening Torques on page 10-28.

Once the vessel is in use, ensure that the hatch extension is not leaking water.
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