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Posted for "Angier M. Ames" <alphadog [at] nii.net>



Figure 14-4 in the manual shows the master relay, both high and low

pressure

relays as well as the hydraulic power pack all attached to a plate which is

then grounded to the battery - terminal. Does it make sense that all these

items require a common ground? I don't think so.



The power pack itself has both a large red and blue lead and a smaller gage

black lead. The manual very clearly states in more than one place that this

black lead should be cut off close to the case and taped since it is not

used.

I had a discussion this week with the folks at Oildyne and they thought

this

instruction was most bizzare. Apparently, there is a thermal switch inside

the

case to protect against overheating and this is the ground wire for this

circuit.



Maybe I'm missin something here but I don't understand any need to ground

the

case of the master relay or the power pack. My inclination would be to

ground

the cases of BOTH the high and low pressure relays ONLY via connection to

the

thermal switch black lead coming from the power pack itself. This way, if

that

thermal switch breaks, the relays would lose current and shut off the power

pack.



Does any of this make sense?





On another issue, could one of you LC20 builders identify a use for part

#R6.

The package description says "spring 9" PC compression"



Thanks,



Angier Ames