|
#1
|
|||
|
|||
Correct Larry! (mostly!)
When I read your comments, I knew that my P337 did not have wet pumps - it actually does have Dry pumps with De-ice. Here is why: From the Cessna Service Manual Page 14-9: The dry vacuum pumps are replaced with oil lubricated pumps and oil separators when the optional de-ice system is installed thru aircraft serials P3370052. Beginning with aircraft serials p3370053 and FP3370001 the vacuum pumps are replaced with larger capacity DRY vacuum pumps when the optional De-Ice System is installed. So not all 337's have Wet pumps with de-ice - only those prior to serial 0053. The service manual goes on to say NO SUCTION INDICATED AT ONE SOURCE: Probable Cause may be any of the following: Defective Vacuum Pump - or Disconnected, broken, or plugged lines - or Defective relief valve - or Defective suction guage. It doen'nt mention the drive coupling - but that is also a great suggestion.. Let us know what you find! Last edited by Pat Schmitz : 01-11-06 at 10:59 PM. |