KEY FEATURES AND BENEFITSUNDERCARRIAGE OPTIONSSMALL, MEDIUM, AND
LARGE EXCAVATORSTHE RIGHT UNDERCARRIAGE
TO DO THE WORKAs the only manufacturer to design and build our own
undercarriages for the past 110 years, we know thatthe more precisely you match iron to application,
the more effective and efficient your work will be.
And that builds a stronger bottom line.

BY CHOOSING A CAT® UNDERCARRIAGE, YOU ARE SETTING YOURSELF UP FOR SUCCESS.
Every Cat® Undercarriage is built to wear as a system, to optimize the overall performance of your Cat excavator.
GENERAL DUTY (GD)

HEAVY DUTY (HD)HEAVY DUTY XL (HDXL)WHERE ITSHOULD WORK

Low-to-medium abrasion/low-tomoderate impact applications

Medium impact and medium travelapplications

High impact and high travelapplications

TYPE OF JOB

Utility

Production

Production

TYPE OFMAINTENACE

Bushing turn capable, not guaranteed

Bushing turn capable

Bushing turn capable

ABILITY TOREBUILD OR
REUSEDesigned to run to destruction

Idlers can be reused or rebuilt

Idlers can be reused or rebuilt

General Duty Track
General Duty undercarriage has proven reliability when
performing in low-to-moderate impact applications with a priority
on cost control.
When converting from Heavy Duty, no retrofitting is required, and downtime
is minimal with our interchangeable parts.

+ Compatible with Heavy Duty
+ Uses proven Cat components and sealing systems+ Lowest upfront cost in Cat undercarriage portfolio+ System Available for 311-395

Heavy Duty Track
The Heavy Duty undercarriage with PPR (Positive Pin Retention)
reduces end play movement and tightly controls seal motion forlong interval pin/bushing wear life, providing industry leadingperformance. Performs best in medium impact and medium
travel applications.

+ Up to 30% longer life compared to General Duty
+ Resists pin walking and link cracking for reliable sealing
and maximum track life
+ Bushing turn capable for extended track life
+ System Available for 315-352

Heavy Duty XL Track
The Heavy Duty XL Track takes proven Heavy Duty undercarriage
to the next level with exceptional wear life and lower cost per hourthan competitive brands in tough applications. Tackles the mostrigorous terrain and extreme applications without fear of breakage.
Performs best in high-impact and high travel applications.

+ Up to 50% longer life compared to General Duty
+ Positive Pin Retention (PPR2) mechanically locks the link to thepin to handle the toughest conditions+ Addition of stronger Duralink design+ System Available for 315-326 and 349-395
2

CLAMP MASTER
FOR HYDRAULIC EXCAVATORSDIG DEEPER AND SAVE TIME AND MONEY WITH A CLAMP MASTER DESIGN THAT MAKES
TRACK INSTALLATION SAFER AND EASIER.

PERFORMANCE IMPROVEMENTS
Caterpillar’s new Clamp Master saves you time and money by making track installation on most models of Cat Hydraulic Excavators safer andeasier than ever. The improved clamping master track link assembly replaces both slip style and press fit joints. With this innovative design,use of a portable field press is unnecessary—which means you get back to work faster.

+ Improved master joint that addresses durability andserviceability in a single design
Bolt clamping force closes gap
to create pin retention

5 mm gap

0.75 mm gap+ 25% better pin retention than a press fit master,
removing the risk of damage to the cotter pin+ Eliminates the need for a portable field press+ No special master pin required for track master link
+ Available for any standard hydraulic excavator in7.5” (190.5 mm) pitch size class (315-326) covering all
types of Undercarriages, including General Duty andHeavy Duty.

SMALL EXCAVATORSGENERAL DUTYHEAVY DUTYHEAVY DUTY XLUNDERCARRIAGE ASSURANCE

311-312

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

313 NGH / GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

313 D2L/ D2 GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

315 NGH / GC

GD - 4 years / 3000 Hours
HD - 4 years / 4000 Hours
HDXL - 4 years / 5000 Hours

317 NGH / GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours
HDXL – 4 years / 5000 Hours

MEDIUM EXCAVATORSGENERAL DUTYHEAVY DUTYHEAVY DUTY XLUNDERCARRIAGE ASSURANCE

320 NGH / GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours
HDXL – 4 years / 5000 Hours

323 NGH

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours
HDXL – 4 years / 5000 Hours

325 NGH

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours
HDXL – 4 years / 5000 Hours

326 NGH

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours
HDXL – 4 years / 5000 Hours

330 NGH / GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

335 NGH

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

LARGE EXCAVATORSGENERAL DUTYHEAVY DUTYHEAVY DUTY XLUNDERCARRIAGE ASSURANCE

336 NGH / GC

GD – 4 years / 3000 Hours
HD – 4 years / 4000 Hours

345 GCGD - 4 years / 3000 Hours
HD - 4 years / 4000 Hours

349 NGH

GD - 4 years / 3000 Hours
HD - 4 years / 4000 Hours
HDXL - 4 years / 5000 Hours

352 NGH

GD - 4 years / 3000 Hours
HD - 4 years / 4000 Hours
HDXL - 4 years / 5000 Hours

365-374

GD - 4 years / 3000 Hours
HD - 4 years / 4000 Hours

385-395

GD - 4 years / 3000 Hours
HD - 4 years / 4000 HoursPEDJ0819 -01
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