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Product: TRUCK
Model: 769C TRUCK 01X
Configuration: 769C TRUCK 01X00001-02876 (MACHINE) POWERED BY 3408 ENGINE
Service Magazine
2006/06/26
Media Number -SEPD0843-00 Publication Date -26/06/2006 Date Updated -26/06/2006
i02562260
New Front Crankshaft Seals and New Rear Crankshaft Seals
are Now in Production {1160, 1161}
SMCS - 1160; 1161
Machine Engines:
3406
3408
3412
3456
C-15
C-16
Service Magazine SEPD0682, 12 May 2003, "New Front Crankshaft Seals and New Rear Crankshaft
Seals are Now in Production". Disregard this article. See the article that follows.
Description of Change: A new front crankshaft seal and a new rear crankshaft seal are now in
production. Production for both seals started 9January 2003. These new seals are for the front and rear
sealing journals of the crankshaft. The new seals incorporate a one piece seal/wear sleeve
combination. The new crankshaft seals have a redesigned wear sleeve that has a flanged face. This
new flanged face rotates with the crankshaft in order to keep dirt away from the sealing lip. This will
provide better control of contaminants.
The removal procedure for the new seals has been changed, from the former seal design because of
the new flanged face on the wear sleeve. The seal face is blocked or hidden by the new flanged face
on the wear sleeve. Refer to the section "Removal Procedure" and table 2 for the required removal
tools. The assembly procedure for the new seals has not changed from the former seal design. Refer to
section "Installation Procedure" and table 3 for the required tools for assembly.
Adaptable To: The new crankshaft front seal and the new rear seal is adaptable to the above Machine
Engines: 3406, 3408, 3412, 3456, C15 and C16. The new crankshaft seals are a direct replacement for
the former seals. Refer to table 1 below for the new part numbers and the former part numbers.
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Table 1
Parts List
Item Qty New Part Number
Description Former Part Numbers
Front Crankshaft Seal 2W-1733, 4P-2733, or 187-8953
1 1 142-5867
Rear Crankshaft Seal 2W-1734, 101-1716, or 130-8107
1 1 142-5868
Removal Procedure
Use the same removal procedure for the front and rear seals.
ReferenceSee table 2 and illustration 1.
Table 2
Required Tools
Tool Part Number Part Description Qty
A 1U-7600 Slide Hammer Puller 1
Illustration 1 g00997360
New seal
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(1) Seal
(2) Wear sleeve
(3) Wear sleeve flange
1. Use a hammer and a punch in order to puncture 3 or more holes into the wear sleeve (2) on the
flange side of the wear sleeve (3). Use Tool (A) to remove the wear sleeve (2) .
2. Use a punch or Tool (A) to puncture a hole in seal (1). Use Tool (A) to remove seal (1) .
Installation Procedure
ReferenceSee table 3 and illustrations 2, 3, and 4.
Table 3
Required Tools
Tool Part Number Part Description Qty
A 5P-1733 Seal Locator 1
5P-7301 Seal Locator (1) 1
5P-1737 Bolts 3
B
5P-7310 Bolts (1) 3
C 9S-8858 Nut (Seal Installer) 1
D 6V-6142 Front Seal Installer 1
6V-6143 Rear Seal Installer 1
E
8T-2683 Rear Seal Installer (1) 1
(1)
Required tool for engines with rear gear train
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened component life.
Note: The seal and the wear sleeve must be replaced at the same time. Once the seal and the wear
sleeve are separated, these components cannot be used again. Refer to Special Instruction,
SMHS8508, "Special Handling Information and Installation Instructions for Crankshaft Seal Groups
That Have Hydrodynamic Grooves In the Sealing Lip" before the seal is serviced.
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Note: Do not use any type of lubricant during the installation of the crankshaft seal and the
wear sleeve.
NOTICE
The front and rear seals and wear sleeves have different spiral grooves
in the seal. Because of this type of design, the front seal group for an
engine is different from the rear seal group. If a seal group is installed
on the wrong end of the engine, oil can actually be taken out of the
engine instead of moving oil back into the engine.
Illustration 2 g00515623
Crankshaft seal installation
Note: Install the seal with the directional arrow outward in order to show the direction of the
crankshaft rotation.
1. Before installation of the crankshaft seal and the wear sleeve, inspect the crankshaft for
scratches. Also, inspect the crankshaft for any distortion on the surface that may lead to an out
of round condition. Use a polishing cloth in order to remove any imperfections on the
crankshaft.
2. Use 4C-9500 Quick Cure Primer to clean the outside diameter of the crankshaft.
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Note: The new seal comes with the retaining compound that is already applied to the inside
diameter of the wear sleeve.
Illustration 3 g00997376
New seal
(1) Seal
(2) Wear sleeve
Illustration 4 g00997146
Typical example
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3. Fasten Tool (A) to the crankshaft with Tool (B) .
4. Position wear sleeve (2) and seal (1) on Tool (A). Install Tool (D) for the front seal, or Tool
(E) for the rear seal, onto Tool (A) . Lubricate the face of the washer on Tool (C). Install Tool
(C) on Tool (A) .
5. Tighten Tool (C) until Tool (D) or Tool (E) contacts Tool (A) .
6. Remove Tool (C) and then remove either Tool (D) or Tool (E). Remove Tools (A) and (B).
Check the crankshaft seal and the wear sleeve for the correct installation.
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