Oregon 73LGX, 75LGX, 72LGX User Manual

72LGX, 73LGX, and 75LGX SUPER GUARD® CHAINS

CHAIN PITCH AND GAUGE

PITCH

3/8"

GAUGE

KICKBACK – ANSI CLASSIFICATION

72LGX, 73LGX, and 75LGX are yellow-label chains. Though these chains have ramped depth gauges which reduce kickback energies, these are NOT low-kickback chains. These chains should be used ONLY by individuals with experience and specialized training for dealing with kickback.

RECOMMENDED TYPES OF USE

72LGX .050"

73LGX .058"

75LGX .063"

OREGON® 72LGX, 73LGX, and 75LGX (3/8"-pitch Super Guard®) chains feature cutters that have an advanced grind geometry that is "work ready". This series saw chain is only for professionals who demand saw chain that delivers high performance, resists stretch, simple to maintain, provides long life, and is consistent from loop to loop.

Features Beneﬁts

Advanced grind geometry Signiﬁcantly enhanced out-of-box grind•

No out-of-box maintenance needed• Superior cutting efﬁciency, less force-feed • required Improved fuel economy•

Blued cutters Superior corrosion resistance•

Base-cutter hardness consistency• Pro-look• Improved strength•

Professional

RECOMMENDED SAW SIZES

Use with gasoline-powered saws

3.0 to 6.0 cu. in. (50 to 100 cc)

RECOMMENDED BAR LENGTHS

12 in. to 36 in. (30 to 91 cm)

KICKBACK-REDUCING FEATURES

Ramp-shaped depth gauges on each cutter

Commercial

Tumbled parts Smooth ﬁnish•

Offset ramp-shaped depth gauges

Clean ground gullets Increases chip ﬂow, less chain clogging•

Long, high-strength cutter top plate

Top-plate-angle witness mark

Lubrilink™ tie straps More oil stays where it's needed: on the chain•

* patent pending

Improved joint articulation, combats • tight joints

Offset reduces roughness, helps prevent • cutter from diving into the sidewall of the cut The ramped shape reduces kickback ener-• gies without affecting performance

No out-of-the box ﬁling needed•

Resists breakage• Longer cutter life•

Sharpening is easy and consistent, every • time and serves as end-of-life indicator

CUTTER SEQUENCE

Standard sequence: 72LGX, 73LGX, 75LGX Skip sequence: 72JGX, 73JGX, 75JGX

72LGX F&B A107022 AG 1108

FILING

.025" (.6 mm)

INSTRUCTIONS

(without ﬁle guide)

A B C D

TOP PLATE ANGLE DOWN ANGLE DEPTH GAUGE SETTING FINISHED CUTTER

25º

VISE ROTATE ANGLE VISE TILT ANGLE HEAD TILT ANGLE DEPTH GAUGE SETTING FINISHED CUTTER

GRINDING

INSTRUCTIONS

25º

Failure to follow filing instructions can increase the level of kickback which

can result in severe injury to the saw operator or bystanders.

* Do not exceed the depth-gauge setting shown above

* Always file depth gauges back to their original rounded or ramped shape after lowering

File Size Assembled File

Guide

7/32" (5.6mm) 31686 (EA.) 70502 (12-PK.)

Round Files Depth Gauge

40458 (2-PK.)

10º

55º

When using an OREGON® ﬁle guide, ALWAYS hold it level, 0°, ﬂat on the Top Plate.

OREGON® 72LGX/JGX, 73LGX/JGX, and 75LGX/JGX Super

Guard® chains may be capable of kickback that could result in serious injury to the saw operator or bystanders. Although these chains have features designed to reduce kickback energies, these are NOT low-kickback chains. Do not use OREGON® 72LGX/JGX, 73LGX/JGX, or 75LGX/JGX Super Guard® chains unless you have experience and specialized training for dealing with kickback. Saw chain with lower kickback potential is available.

Maintenance Tools

Flat File Bench Grinder

Tool, .025"

31941 (10-PK.) 12211 (12-PK.) OR534-316

Wheel 5 3/4"

(3/16" Thick)

Mini Grinder Wheel, 4 1/4"

OR4125-316 (3/16" Thick)

Chain Replacement Parts

Chain Type Left-hand Cutter Right-hand Cutter Tie Strap Preset Tie Strap Drive Link

72LGX/JGX P26197 (25-PK.) P26198 (25-PK.) P23837 (25-PK.) P23910 (25-PK.) P65715 (25-PK.)

73LGX/JGX P26197 (25-PK.) P26198 (25-PK.) P23837 (25-PK.) P23910 (25-PK.) P68183 (25-PK.)

75LGX/JGX P26197 (25-PK.) P26198 (25-PK.) P23837 (25-PK.) P23921 (25-PK.) P30927 (25-PK.)

Which cutter sequence is best, standard or skip?

What type of cutting do you do? The cutter sequence to use:

I cut "non-ﬁbrous" woods of average size, with guide bars up to 24" Standard sequence (72LGX, 73LGX, 75LGX)

I cut ﬁbrous woods, such as cedar or hemlock Skip sequence (72JGX, 73JGX, 75JGX)

I cut large wood using very long bars, approximately 28" or longer Skip sequence (72JGX, 73JGX, 75JGX)

Do you cut wood in dirty or abrasive conditions?

If you cut abrasive woods such as railroad ties, skidded wood, fire damaged areas, partially logged areas after a skidder, or any place where wood is dirty, we recommend you use the MultiCut™ versions of OREGON® chains. MultiCut™ chains have extra-heavyduty chrome plating applied with an advanced plating process to withstand these kinds of tough, dirty conditions. It also allows you to maintain your saw chain without the need of any special tools. Contact OREGON® or your authorized OREGON® distributor for further information on MultiCut™ chains.

Standard Chain Part No.

72LGX M72LPX

73LGX M73LPX

75LGX M75LPX

(LGX not available in Multicut)

Multicut Part No.

For more information on these and other OREGON® products, contact your authorized OREGON® distributor, or:

OREGON® | BLOUNT, INC. PO Box 22127 · Portland, OR, U.S.A. 97269-2127 Phone: 503-653-8881 Fax: 503-653-4201 Web: www.oregonchain.com

IN CANADA: OREGON® DISTRIBUTION LTD. 505 Edinburgh Rd. N., Guelph, Ontario, Canada N1H 6L4 Phone: 519-822-6870 Fax: 519-822-4999

Printed in USA 72LGX F&B A107022 AG 1108