Lasdrop Support Center
We offer a complete array of replacement parts for all model seals, including older seals.

Email:
support@lasdrop.com

Call:
1 800 940 7325 - toll free
1 586 468 3729 - direct
1 586 468 3989 - fax

Gen II

Original Bellows
DrySeal

Q. How long should a seal last?
A. The DrySeal model will last three to five years before the inner lip seal must be changed. If a back-up seal is installed during the original installation, the seal can be easily installed without removing the shaft from the coupling. The Original Bellows and Generation II models will last as long as eight to ten years before servicing. Both models would most likely require refurbishing of the seal surfaces. In addition, the bellows on the Original model should also be inspected and replaced, if necessary. As in any part, they should be routinely inspected.

Q. Does a Lasdrop seal wear a shaft like the stuffing boxes do?
A. There is absolutely no shaft wear from the "Original" Bellows and Generation II. Because it is a lip-seal design, the "DrySeal" model produces very little wear on the shaft.

Q. How do I mount the unit if I have a flanged stern tube?
A. On most flanged or rigid-type" stern tubes, it is possible to disassemble the front of the unit and turn it around so that the tube is protruding forward to permit the clamping of the seal. If this is not possible, we offer flange adapters to accommodate any configuration of stern tube.

Q. Does the seal need maintenance?
A. The seal are virtually maintenance-free. Like any part, the seal should be routinely inspected. If the vessel is in dry dock or not operated for a long period of time, it is good idea to wash down the seal with fresh water.

Q. What if my shaft is out of alignment?
A. All Lasdrop seals feature a cutlass bearing inside the housing to compensate for shaft misalignment.

Q Is the seal difficult to install?
A. Installation is easy if you can access the area where the seal is installed. It is necessary to disassemble the shaft from the coupling. The shaft needs to be slid back far enough to remove the old stuffing box.

Q. Does the seal create any electrolysis?
A. No. All seals are mounted with material of high dialect strength that isolates them from any metal components.

Q. Do I need water lubrication?
A. At hull speeds of 10 to 12 knots and above, a vacuum is created in the stern tube that draws the seawater used for cooling and lubrication. At slower hull speeds, no water lubrication is necessary. The supply hose can instead be used to purge the air out of the seal when the vessel is put back in the water.

Q. What do I need for ordering?
A. Shaft size and the outside diameter of the stern tube. Make sure there is adequate clearance between the coupling and the end of the stern tube.