Hamilton Jet HJ212, Installation And Service Manual

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Installation and Service Manual
Overhaul
Introduction
The maintenance operations details in this section should be carried out when the vessel is on
a slip or in dry dock.
Only overhaul the jet unit components if:

Wear or damage is detected.

Specified on the maintenance schedule.
Salt water operation:
The HJ212 jet unit is designed as a trailered craft and is not intended to be moored in the sea. It can be used
freely in the sea, but the vessel should be slipped or trailered and flushed with fresh water or given a short
run in fresh water before storage. It is good practice to do this after any days operation in salt water.
If used extensively in salt water, it is recommended that all casing and seals be inspected after every 30 hours
of use. Annually dismantle and inspect all internal and external surfaces for corrosion. Particularly inspect the
mainshaft [1] around the water seal and bearing. rubber seals, such as the transom seal [46] should be
replaced when required.
Before starting the overhaul:
Disconnect and remove all control equipment attached to components being overhauled.
Make a note of electrical and hydraulic connectors so they can be correctly reconnected.
Blank off all hydraulic fittings to prevent the entry of dirt or loss of hydraulic oil.
When the overhaul is finished:
Commission the jet unit. Refer to section: Commissioning on page 6-1.
Commission the control system. (Refer to the Installation and Service Manual for the control system)
Vessel commissioning must be done after any overhaul as adjustments and connections may
have been altered during the process.
Tools:
Special tools are required for the overhaul of the jet unit, Refer to section: Tools on page 8-18.
For driveshaft service and overhaul, refer to the manufacturer's information.
9-3