Re: Camper / Travel Trailer
Posted: Sun Aug 13, 2017 3:58 pm
went to walker ... a little bumpy today .
the oil pressure on #2 was high on a cold start (as in buried needle) , after warm it went to the bottom end of the green .
stopped for fuel (fosston was out) ... started back up and the oil pressure was well into the green to walker .
stayed in walker a couple of hours and took off ... the oil pressure was ok , within a BCH of the #1 engine .
at idle , the pressure was at the bottom of the green .
the only thing i can think of is that the spool and mating surfaces are a bit scored and sticky .
the spring is getting tired and has been shimmed ... this would account for the high cold start pressure ... the spool cannot back out enough to relieve the high pressure of the cold oil .
the spool then sticks into a position that allows the warm oil to bypass too much .
if all pressure is removed (shutdown) the spool is allowed to close all the way and can then work in a "good" physical area .
it is the cold start that is causing the spool to travel too far and get hung up .
yep , i am looking for a used pump assembly or a new spool and spring .
aaannnd ... it was bumpy as hell coming back ! the storms had set in ... flying at 1000 feet or so to be able to see the ground .
dramamine is my friend .
the oil pressure on #2 was high on a cold start (as in buried needle) , after warm it went to the bottom end of the green .
stopped for fuel (fosston was out) ... started back up and the oil pressure was well into the green to walker .
stayed in walker a couple of hours and took off ... the oil pressure was ok , within a BCH of the #1 engine .
at idle , the pressure was at the bottom of the green .
the only thing i can think of is that the spool and mating surfaces are a bit scored and sticky .
the spring is getting tired and has been shimmed ... this would account for the high cold start pressure ... the spool cannot back out enough to relieve the high pressure of the cold oil .
the spool then sticks into a position that allows the warm oil to bypass too much .
if all pressure is removed (shutdown) the spool is allowed to close all the way and can then work in a "good" physical area .
it is the cold start that is causing the spool to travel too far and get hung up .
yep , i am looking for a used pump assembly or a new spool and spring .
aaannnd ... it was bumpy as hell coming back ! the storms had set in ... flying at 1000 feet or so to be able to see the ground .
dramamine is my friend .