Lewmar 140TT - Installation - Final Assembly; 250 TT & 300 TT Hub Unit Installation; Preparing for Final Assembly

10
Electric/Hydraulic Stern Thruster
Models 185TT, 250TT & 300TT
GB
11
Electric/Hydraulic Stern Thruster
Models 185TT, 250TT & 300TT
GB
1. Installation
1.5 250T T & 300TT
Installing hub unit
• Place gasket on hub and locate through centre
hole.
Fig. 1.51
• Apply zinc chromate paste or marine grease
to location bore and assemble saddle onto hub
(sicoflex or similar maybe used to seal saddle
in place). Apply blue loctite to bolts and hand
tighten along with supplied washers.
Fig. 1.52
• Assemble anode kit and propeller in this order:-
large washer, propeller, anode, small washer and
nyloc nut onto propeller shaft.
Tighten hub/saddle bolts as instructed in main
thruster installation manual.
Fig. 1.53
• Tighten hub/saddle bolts as instructed in main
thruster installation manual.
NOTE: Poor internal tunnel surface could cause
leakage. Apply sealant to this area and gasket
if in doubt.
Fig. 1.54
• Antifoul bronze hub.
1.6 Preparing for
final assembly
• Before final assembly of stern tube, check
sur faces are clean, smooth and free from
grease.
Completely fill sealing groves with a contiuous
bead of Sikaflex or equivalent.
Fig. 1.61
• Bolt stern tube assembly in place large thick
washers plus springs at a length to suit transom
thickness. Bolt holes and heads must be sealed
with Sikaflex or equivalent.
Fig. 1.62
Fig 1.63
The electric motor must be supported as it is being
installed horizontally.
• Fit the motor and cables (see relevant section in
main installation manual).
Fig. 1.63
It is important that all power cables enter the
sealed installed area at a high point to avoid
possible water ingress.
A4 Stainless Steel Property class 70 or greater
Thruster Bolt
140 M8 (
5
/
16
”)
185 M10 (
3
/
8
”)
250 M10 (
3
/
8
”)
300 M10 (
3
/
8
”)