Hamilton Jet HJ241, Manual

Page: 122 / 202

9.18
9 OVERHAUL
9.6 B
EARING
H
OUSING
A
SSEMBLY
O
VERHAUL
HJ-241 / HSRX
9.6.1 Water Seal Removal
Refer to Drawings HJ-241-01-000 Basic Jet Assem-
blies Standard and Dry Run Sht 1 & 2 and Drawing
61483 Rotary Seal .
1. Lubricate the Mainshaft with a 20:1 water and
household detergent mix to help remove the
Water Seal.
NOTE: The Rubber Bellows [5] ( Shown in Drawing
61483 Rotary Seal) may adhere to the
Mainshaft and may require cutting to
remove. Take care not to score the Mainshaft
if the Rubber Bellows has to be cut away.
2. The Seal Face Holder [12] assembly can now be
removed by gently tapping the Seal Face Holder
forward from the rear of the Jet, using a wooden
drift.
3. Take care to support the Mainshaft as the Seal
Face Holder comes free.
4. Remove the Seal Face Holder [12] complete with
the Inner Seal [6] and the Inner Seal Sleeve [5].
5. Remove Intake/Seal Face Holder "O" Ring [35].
6. Remove the Water Seal Carbon Face forwards off
the Mainshaft. Item [3] of Drawing 61483 Rotary
Seal .
7. Break the seal between the Water Seal Neoprene
Bellows [4] and the Mainshaft. Slide the
Neoprene Bellows [4], Holder [5], Spring [6] and
Spring Cap [7] forward off the Mainshaft.
Drawing 61483 Rotary Seal refers.
NOTE: Take care during removal of the Waterseal
Assembly as the Stationary Face is ceramic
and is quite brittle.
REMOVING THE BEARING HOUSE ASSEMBLY
COMPLETE WITH MAINSHAFT AND WATERSEAL.
NOTE: The Bearing Housing can be dismantled
complete with the Jet Unit Coupling,
Mainshaft and Waterseal attached, if the
Impeller has already been removed.
I f the Impeller has already been removed, proceed
as follows:-
1. Remove the Nuts [17] and Spring Washers [16]
on the 3 Studs [43] attaching the Bearing Housing
[8] to the Intake [19].
2. While supporting the Mainshaft, the complete
Bearing Housing, Waterseal and Mainshaft
Assembly can now be removed by tapping the
Seal Face Holder forward from the rear of the Jet,
using a hammer and wooden drift.
3. The complete Assembly can now be removed to
a workbench to carry out further dismantling.
4. Continue as from Sub-Heading “Water Seal
Removal” to dismantle the remainder of the
Bearing Housing Assembly.
CHECKING FOR WEAR:-
Clean all components and check the following parts
for wear or damage. Obtain replacement parts if
significant wear or damage is found.
1. Inner and Outer Main Bearing Seals [6]. Check
the Seals for wear, cuts or deformity. Replace if
damaged.
2. Inner and Outer Seal Sleeves [5]. Check the
Seals for wear, fretting or damage. Replace if
damaged.
The Sleeves may be turned end for end
instead of replacing .
3. Bearing [7]. Check that the Bearing has no signs
of wear. Replace if any signs of wear are evident.
NOTE: Do not swap the Bearing inner halves. Keep
the Bearing clean.
4. Bearing Housing [8]. Ensure that there are no
signs of wear, fretting or relative movement in
the Bearing Housing.
5. Bearing Carrier [3]. Ensure that there are no
signs of wear, fretting or damage.
6. Seal Face Holder [12]. Ensure that there are no
signs of wear, fretting, or relative movement.
C
AUTION
The Water Seal should not be
removed unless it is being
replaced. The Water Seal will not
perform correctly if it is removed
and then reinstalled.
The Water Seal need only be
replaced if it is leaking, or there is
insufficient material left to last to
the next inspection. refer to sec-
tion 8 Maintenance for details of
the inspection required.