Page 46 (2-24) of the Operator's Manual
for your coach shows the location of the pump assembly for your HWH slide/jack hydraulic system. The hydraulic fluid tank is part of that assembly.
I believe that HWH
had a problem with the fittings on their hydraulic hoses around the time you coach was built and they ended up replacing them for many folks. It may be worth your while to check with them and see whether they can help you out
You also might try giving Paul Maddox (azpete)
a call. He works for HWH, is active on these forums, and seems always happy to help out fellow RVers. His number (as he has posted before) is 602 549 3638 or [email protected]