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IMPORTANT: The man hole must be tested with soapy water. The rubber pads that keep the
compartment isolated are subjected to lose its elastic properties by becoming very brittle and
breaking into shards when struck. This is because rubber has moderate resistance to
environmental damage by heat, light and ozone.
Figure 2.18
2.10 Hydraulic Line
Hydraulic line for EIK amphibious undercarriage/excavator is built up from the combination of
pipes and hydraulic hoses. Hydraulic hoses are used when pipes or tube cannot be used, usually
to provide flexibility for machine operation or maintenance. It is more than half of EIK
amphibious undercarriage hydraulic line is covered by hydraulic hoses.
2.10.1 Since the hydraulic hoses are built up by rubber and steel layers, regular inspection must
be made in order to keep the operation safe and steady. Unseen hard and sharp objects
could damage and burst the expose hydraulic hoses especially when operating the
machine in swampy or muddy area.
2.10.2 Hydraulic hoses and pipes inside the pontoon are protected and do not required regular
inspection as per external hydraulic hoses. Inspection is only needs if the machine is
keep losing the hydraulic oil but the leaks could not be detected from external hydraulic
line. In this case, drain ports must be removed and compartment with plenty of
hydraulic oil abnormally flows out from the drain port is subjected to leakage.
2.10.3 Access into the compartment through the man hole and then fix the problems. The
joints and the fittings maybe loosen or the O-rings have lost it elastic properties.
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