July 2020 DEALER INTERNAL USE ONLY

PRODUCT SUPPORT MARKETING BULLETIN

Cat DurilockTM Lip Shroud GET

Underground HRV R1700 to R3000 (All Industry 5 to 10 M3 Buckets)

CAT Durilock™ shroud systems configure to your ever-changing mining

environment in minutes without having to change the base edge or retention.

Durilock Shrouds have 3 interchangeable shroud styles and features Cat Infinitite TM retention that
provides positive retention reliability without time spent performing re-torque procedures.

Application Marketing
Durilock delivers 3 levels of performance from 1 platform, meeting requirements in Greenfield
exploration and high-production applications. Penetration shrouds separate tightly compacted
material, where the high abrasion design positions maximum wear material at the base of the shroud.

Marketing Strategy
Customers who currently operate (mechanical) cast shrouds will recognize the value in a positive
retention system that IS NOT dependent on threaded fasteners. Cat Infinitite™ will reduce
maintenance time by over 50% by removing the need for re-torques between initial install and wear
out.

A new base edge assembly will be required to operate Durilock Shrouds. A base edge conversion
program or a CVA that creates a monthly level-pay structure based on a previous monthly spend are
ways to overcome the initial investment.

PEJJ0343
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Lip Assembly

The Lip Assembly provides the mounting surfaces for the shrouds and corner protectors, which
balance corner and center station wear rates. Cast corners are welded to the Base Edge Assembly to
create a Lip Assembly which provides the required strength and reliability.

Stepped Corner base edge

The corners incorporate a “stepped” design that eliminates
corner shroud torsional loads. This greatly reduces the
corner breakage experienced by other systems due to their
adapter-edge angles. This results in better reliability.

The weld boss is mounted to the base edge and serves as the compression surface for the Infinitite TM
compression system.

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Retention

Retainer secures shroud to edge

Compressor retracts elastomer at installation

InfinititeTM delivers reliability without re-torque

Weld Boss secures the retention assembly

InfinititeTM is an elastomer compression retainer that provides continuous positive retention for the
shrouds. This helps reduce the damage that can occur with loose fitting GET system designs or those
positive retention systems that are not maintained.

With InfinititeTM retention, there is no complex hardware systems to fail or break and it is easier to
handle vs small complex retention parts.

The compressor block has 2 purposes. 1) “compress” the Infinitite TM spring during installation via a
bolt & nut and 2) keeps the retainer key in place to retain the shroud to the edge during service.

The shroud retention system incorporates a 3-degree taper to

ease shroud removal by relieving the bond that can be
caused by material packing.

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Integral Corner Design

The integral corner design provides a 15% Corner Life
extension and improved penetration as compared to
other systems which experience corner erosion &
shortened bucket life cycle due to “corner rounding”

Lip Shroud Styles

 D50S Standard – Traditional wedge shape used in most production and development
applications. Wear Material ~48%

 D50A Abrasion - Contoured design shapes the shroud and repositions 12% more wear
material in the shroud base while maintaining overall shroud weight. Used to balance bottom-
up wear in some applications. Wear Material ~56%

 D50P Penetration - 70% less leading-edge surface area delivers the penetration you need in
compacted materials, while the shroud design protects your base edge. Wear Material ~48%

Wear Mapping

Durilock parts have been incorporated into the Caterpillar Bucket Pro application.
Bucket Pro can help establish GET performance credibility with your customers &
defend against subjective competitive claims.

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Competitive Overview

Most all the competitive systems use complex retention systems that are more difficult to handle
(gloves) and remove/install than Durilock. Small fasteners are easily lost and misaligned with mating
parts. This can create a bad experience for the Customer technician.

Competitors can generally produce good steel, of equivalent performance as the Cat product.

Sandvik Shark product is globally accepted,

with MAKO being the next generation
shroud. The retention is like Shark but
located on the bevel vs edge top. They have
two different (mass) offerings for varying
abrasion levels.

Removal effort includes Clean-out time

(Digging/washing) and removal of threaded
fastener.

Retention is positive pull-back onto lip.

Retention boss must be welded to lip.
Re-torque required.

Keech SNRG is like Shark in design/retention complexity. They

gained market entry with their Bolted ½ Arrow product. Retention is
positive pull-back onto lip. Re-torque required.


Esco Eversharp configuration
requires weldment of a cast
base plate to support their
Torque Wedge retention
system and a custom base
edge bevel.

Torque wedge assembly

vertically drops into shroud
“pocket”, which can be simpler
than other fasteners. Retention
is positive pull-back onto lip.
Re-torque required.

Torque wedge removal allows

wedge/body to collapse for
removal.

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Hensley uses their J-Bolt fastener retention. Retention is positive pull-

back onto lip, Re-torque required. Retention boss must be welded to
lip. Removal effort includes Clean-out time (Digging/washing) and
removal of threaded fastener.

Wearforce Fastlock uses a cam-lock retainer that does provide

positive pull back, but does not require Re-torque. The lock is both
conical and eccentric. 180* turn is intended to pull the shroud on tight,
then the rubber key acts as both a detent for anti-rotation and minimal
pull back due to the rubber compressing. The conical screw thread is
intended to be able to break away from packing @ removal, but
(surface area in the screw thread) makes it difficult to break the
packing bond.

Talon Lockjaw uses a cam-lock retainer

that does not provide positive pull back.
Does not require Re-torque. Vertical
cam-locks can be difficult to remove
(unlock torque) as material can pack
around the mating surfaces. Retention
pocket is subject to wear and requires
frequent weld repair.

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FAQs

1. Is this system compatible with the previously mechanically attached system?

a. No, this system requires a bucket rebuild in order to incorporate the new design features
of the system.
2. After installation of the system how often do I need to perform maintenance checks between
installation and removal?
a. The system is designed as a “Set and Forget” system where there are no retorques or
maintenance required between changeouts
3. Are the retention components reusable?
a. It is recommended to purchase a new retention kit with the installation of each new
shroud to ensure system will install properly and provide necessary positive retention to
counteract operational forces.
4. If I am just starting out with this system which should I start with: Standard, Penetration, or High
Abrasion?
a. It is recommended to start with the standard shroud and adjust based on the balance
between wear life and performance.
i. Penetration shrouds are designed for penetration / productivity performance
ii. High Abrasion shrouds are designed for extended life by redistributing wear
material for bottom-up wear applications (road cleaning)
5. Which corner guards should I use on my bucket?
a. It is recommended to use the standard corner guards on buckets not utilizing sidebar
protectors. The extended corner guard is required recommended when using sidebar
protectors to protect against extreme horizontal forces.
6. `Can I use the same bolt for each shroud to install the retention?
a. It is recommended to use a new bolt for each shroud installation to prevent potential
cross threading as bolt becomes worn.
7. Can I leave the bolt in the shroud to “double retain” the shroud?
a. No, leaving the bolt in the shroud will not allow the retention to correctly react with the
retainer plate, and can result in shroud loss.
8. What sort of maintenance practices are required?
a. Compression spring requires no maintenance practices, but continual monitoring of
shrouds is a good practice to prevent shroud breakage or base edge damage

Parts Sales and Marketing Service Support

GET Mining Marketing Catalog (Customer) PEBJ0030 M0081516 Service (Installation and Maintenance) Instructions
GET Parts Book & Specification (Dealer) PEBJ0031 M0076666 Procedure to Install Base Edge (Weld Procedures)
Animation – https://Dealer.cat.com/
Web https://Dealer.cat.com/GET
Durilock IRM (Dealer) – PELJ2527
3D Model Kit – Order ANTARES Part 600-0603

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