Service Repair Manual
Models
E70 EXCAVATOR
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Product: EXCAVATOR
Model: E70 EXCAVATOR 3BG
Configuration: E70 HYDRAULIC EXCAVATOR 3BG00001-UP (MACHINE) POWERED BY 4D31 ENGINE
Disassembly and Assembly
Seal Installation
Media Number -UENR3262-00
Publication Date -01/11/2018
Date Updated -30/10/2012
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Duo-Cone Seals - Install
SMCS - 7561-012
DUO CONE SEALS
Illustration 1
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Background
To reduce the risk of leaks or failures, assemble the duo cone seals correctly. This document applies
to cast, formed, conventional, and inverted Duo-Cone seals and to installations on factory assembly
lines, at dealer shops, and in the field.
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Illustration 2
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Duo-Cone seal
(1) Seal ring
(2) Rubber toric
The two main components of a Duo-Cone seal are shown in Illustration 2.
Illustration 3
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Duo-Cone seal assembly
The standard naming nomenclatures for Duo-Cone seals are listed below.
(1) Seal Ring - The metal component of a seal group.
(2) Rubber Toric (Load Ring) - Elastomeric component of a seal group that applies a face load in
the application. This o-ring style seal retains oil and excludes debris.
(3) Housing (Retainer) Lip - The lip inside the housing (retainer) that helps to retain the seal
ring/rubber toric during installation.
(4) Housing Ramp - The angled ramp that is located on the housing. Maintaining the proper surface
finish is critical.
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(5) Housing Retainer - The recess in which a seal ring and a load ring are installed.
(6) Seal Face - The “active surface” of the seal. In a finished seal the face contains the seal band, seal
band to taper radius, and taper.
(7) Seal Ramp - The inclined surface on the exterior of the Duo-Cone seal ring that positions the
toric between the seal ring and the hou