01/11 rev. 3/12/2013 LM-series fork-mountable booms
Copyright 2011 Vestil Manufacturing Corp.
FORK-MOUNTED LIFT MASTER BOOMS
USE AND MAINTENANCE MANUAL
VESTIL MANUFACTURING CORP.
2999 NORTH WAYNE STREET, P.O. BOX 507, ANGOLA, IN 46703
TELEPHONE: (260) 665-7586 -OR- TOLL FREE (800) 348-0868
FAX: (260) 665-1339
URL: WWW.VESTILMFG.COM EMAIL: SALES@VESTIL.COM
NOTE: Compliance with regulations, codes, and/or statutory (non-voluntary) standards enforced in the location where the
boom is used is exclusively the responsibility of the end user. Before the boom may be used for the first time, the end-
user/owner must perform an “Initial Inspection”. (See “Initial Inspection,” p. 21).
Table of Contents Table of Figures
Product Introduction…………………… 2 Fig. 1 LM-1T & -1NT Exploded Parts Diagrams & Parts Lists………. 5 - 8
Safety Principles……………………..... 3 Fig. 2 LM-OBT & -OBNT Exploded Parts Diagrams & Parts Lists..... 9 - 12
Safety Recommendations…………….. 3 – 4 Fig. 3 LM-HRT & -HRNT Exploded Parts Diagram & Parts Lists….. 13 - 16
Standard Design Elements………….. 4 Fig. 4 LM-EBT & -EBNT Exploded Parts Diagram & Parts Lists…… 17 - 20
Operation Instructions………………… 22 - 24 Fig. 5 LMS-(EBT & -EBNT)-46-(4k, 6k, & 8k) & Parts Lists……..…… 21
Inspections & Maintenance………….. 25 - 26 Fig. 6 Step 1 - Securely connect boom to fork truck...……………….. 24
Product Markings & Labels………….. 27 Fig. 7 Step 3 - Manual adjust degree of boom extension….………… 22
Fig. 8 [OBT Models] Step 4 - Boom Angle Adjustment ……………… 23
LM-HRT &
LM-HRNT
LM-EBT &
LM-EBNT
LM-1T &
LM-1NT
LM-OBT &
LM-OBNT
LM-series fork-mountable booms 01/11
Page 2 of 27
Copyright 2013 Vestil Manufacturing Corp.
PRODUCT INTRODUCTION
Thank you for purchasing a fork-mounted Lift Master boom (“boom”, “product” or simply “LM”) made by Vestil
Manufacturing Corporation (“Vestil”). Our booms are durable, high-quality products that combine safety-conscious design
features and rigorous engineering. Although operation and use procedures are relatively intuitive, all persons who might
use or operate of this product must familiarize themselves with the instructions provided in this manual.
Standard design features include: 2 fork pockets that receive the tines (forks) of a fork truck; 2 load attachment points
(hooks); and either a safety chain or safety strap to wrap around the fork carriage and prevent the boom from sliding off of
the forks during use. Dimensions of offered models, as well as other product specifications appear in the following table:
Model
Designation
Overall Height in
Inches (cm)
Maximum Rated
Load in Pounds (kg)
Net weight in
pounds (kg)
Telescoping boom variants
LM-1T-4 22.5” (~57 cm) 4,000 (~1818 kg) 399 (~181 kg)
LM-OBT-4 28” (~71 cm) 4,000 (~1818 kg) 405 (~184 kg)
LM-HRT-4 80” (~203 cm) 4,000 (~1818 kg) 875 (~398 kg)
LM-EBT-4 13” (~33 cm) 4,000 (~1818 kg) 333 (~151 kg)
LM-1T-6 22.5” (~57 cm) 6,000 (~2727 kg) 462 (~210 kg)
LM-OBT-6 28” (~71 cm) 6,000 (~2727 kg) 456 (~207 kg)
LM-HRT-6 80” (~203 cm) 6,000 (~2727 kg) 949 (~431 kg)
LM-EBT-6 13” (~33 cm) 6,000 (~2727 kg) 375 (~170 kg)
LM-1T-8 23.5” (~60 cm) 8,000 (~3636 kg) 656 (~298 kg)
LM-OBT-8 28” (~71 cm) 8,000 (~3636 kg) 622 (~283 kg)
LM-EBT-8 11.5” (~29 cm) 8,000 (~3636 kg) 562 (~255 kg)
Non-telescoping models
LM-1NT-4 25” (~64 cm) 4,000 (~1818 kg) 319 (~145 kg)
LM-OBNT-4 25” (~64 cm) 4,000 (~1818 kg) 325 (~148 kg)
LM-HRNT-4 79” (~201 cm) 4,000 (~1818 kg) 627 (~285 kg)
LM-EBNT-4 12” (~30.5 cm) 4,000 (~1818 kg) 251 (~114 kg)
LM-1NT-6 25” (~64 cm) 6,000 (~2727 kg) 382 (~174 kg)
LM-OBNT-6 28” (~71 cm) 6,000 (~2727 kg) 376 (~171 kg)
LM-HRNT-6 79” (~201 cm) 6,000 (~2727 kg) 697 (~317 kg)
LM-EBNT-6 12” (~30.5 cm) 6,000 (~2727 kg) 503 (~229 kg)
LM-1NT-8 23.5” (~60 cm) 8,000 (~3636 kg) 595 (~271 kg)
LM-OBNT-8 28” (~71 cm) 8,000 (~3636 kg) 461 (~210 kg)
LM-EBNT-8 11.5” (~29.2 cm) 8,000 (~3636 kg) 620 (~282 kg)
“Shorty” lift master booms
Telescoping variants
Model Total Length in
Inches (cm)
Maximum Rated
Load in Pounds (kg)
Net Weight in
Pounds (kg)
LMS-EBT-46-4 46.5 – 76.5
(118 – 194 cm)
4,000
(1,818 kg)
249
(113 kg)
LMS-EBT-46-6 46.5 – 76.5
(118 – 194 cm)
6,000
(2,727 kg)
281
(128 kg)
LMS-EBT-46-8 46.5 – 76.5
(118 – 194 cm)
8,000
(3,636 kg)
430
(195 kg)
Non-telescoping variants
LMS-EBNT-40-4 41.5 (~105 cm) 4,000 (~1818 kg) 196 (~89 kg)
LMS-EBNT-40-6 41.5 (~105 cm) 6,000 (~2727 kg) 228 (~104 kg)
LMS-EBNT-40-8 41.5 (~105 cm) 8,000 (~3636 kg) 380 (~173 kg)
Vestil Manufacturing Corp. created this manual to acquaint owners and operators of our fork-mounted booms with
safe operation and maintenance procedures. Employers are responsible for instructing employees to use the
product properly. Employees and any other person, who might foreseeably assemble, use, repair, or perform
maintenance on the boom must read and understand every instruction BEFOREHAND. Boom operators should
have access to the manual at all times and should review the directions before each use. Contact Vestil for answers
to any question you have after reading the entire manual.
Although Vestil diligently strives to identify foreseeable, hazardous situations, this manual cannot address every
conceivable danger. The end-user is ultimately responsible for exercising sound judgment at all times.
SAFETY PRINCIPLES
LM-series fork-mountable booms 01/11
Page 3 of 27
Copyright 2013 Vestil Manufacturing Corp.
Vestil manufactures 5 models of Lift Master booms. The 5 variants are distinguishable by boom length, whether the
boom length is adjustable or fixed, and maximum rated load. Each unit conforms to the generalized specifications
disclosed in this manual and fulfills our demanding standards for quality, safety and durability.
Vestil Manufacturing Corp. recognizes the critical importance of workplace safety. Each person who might participate
in the operation or maintenance of the product must read this manual. Read the entire manual and fully understand
the directions BEFORE using or performing maintenance on the boom. If you do not understand an instruction,
contact Vestil for clarification. Failure to adhere to the directions in this manual might lead to serious personal
injury or even death.
Vestil is not liable for any injury or property damage that occurs as a consequence of failing to apply either: 1) the
instructions that appear in this manual; or 2) the information disclosed on labels affixed to the product. Furthermore,
failure to exercise good judgment and common sense may result in property damage, serious personal injury or death,
and also are not the responsibility of Vestil.
This manual classifies personal injury risks and situations that could lead to property damage with SIGNAL WORDS.
These signal words announce an associated safety message. The reader must understand that the signal word chosen
indicates the seriousness of the described hazard.
Identifies a hazardous situation which, if not avoided, WILL result in DEATH or SERIOUS
INJURY. Use of this signal word is limited to the most extreme situations.
Identifies a hazardous situation which, if not avoided, COULD result in DEATH or SERIOUS
INJURY.
Indicates a hazardous situation which, if not avoided, COULD result in MINOR or MODERATE
injury.
Identifies practices likely to result in product/property damage, such as operation that might damage
the boom.
SAFETY RECOMMENDATIONS:
Failure to read and understand the instructions included in this manual before using or servicing the boom constitutes
misuse. Study the entire manual before you use the product for the first time and before each subsequent use.
Read the manual to refresh your understanding of the safe operation, inspection and maintenance procedures explained
on p. 25-26. If questions remain after you finish reading the manual, contact Vestil for answers. DO NOT attempt to
resolve any problems with the boom unless you are authorized to do so and are certain that it will be safe to use
afterwards.
Electrocution might result if the boom contacts electrified wires. Reduce the likelihood that an operator or
bystander might be electrocuted by applying common sense:
DO NOT contact electrified wires with the boom;
DO NOT use the boom in an area where it will contact electrified wires;
DO NOT operate the boom close to electrified wires or other sources of electricity;
Before using the boom, always inspect the usage area for unusual conditions that require special precautions.
Material handling is dangerous. Improper or careless operation might result in serious personal injuries
sustained by the boom operator(s) and bystanders. Your use of the boom must always conform to OSHA material
handling regulations (29 CFR section 1910 Subpart N). Subpart N includes 2 sections that regulate the use of fork-
mounted boom-type devices: section 1910.178, “Powered industrial trucks,” and section 1910.179, “Overhead and gantry
cranes” (see http://www.osha.gov/). In addition to regulatory requirements, boom operators should conform to the
following:
DO NOT use a damaged boom. Inspect the boom before each use according to the inspection instructions on p. 22-23.
DO NOT use the boom unless it passes every part of the inspection.
DO NOT use the boom if the safety chain/strap is damaged or absent.
DO NOT use a malfunctioning or structurally compromised boom.
DO NOT lift the boom until it is securely connected to the carriage of the fork truck with the restraint strap.
DO NOT attempt to lift a load weighing more than the boom’s maximum rated load (see Table, p. 2).
DO NOT stand beneath or travel under the boom at any time, and especially not when a load is suspended. DO NOT
permit any person to stand beneath or travel under the boom or the load.
Inform all persons in the area that you are going to use the boom; instruct them to stay clear of the device and the
supported load during operation.
Failure to read and understand the instructions included in this manual before using or servicing the boom constitutes
misuse
(continued from p. 3)
DO NOT allow people to ride on either the boom or the load.
LM-series fork-mountable booms 01/11
Page 4 of 27
Copyright 2013 Vestil Manufacturing Corp.
DO NOT use the boom if any product label (see p. 24) is unreadable, damaged, or absent. Contact Vestil to order a
replacement label(s).
ALWAYS apply proper (fork) lift operation practices learned during your training program. Before raising the boom from
the floor AND before attaching the load to the boom, tilt the fork lift mast away from the boom to ensure that the boom
will not slide towards the tips of the forks.
ALWAYS load the boom according to the instructions that appear on p. 20-21. Failure to properly position a load might
cause the load to swing, which might result in the operator(s) or other persons sustaining serious personal injuries.
Standard design elements:
All Lift-Master booms share the features identified in the diagram below.
Boom
Boom sleeve
Cold shut
[Models featuring safety chains]
Fork
pockets
Supporting
frame
NOTE: In the exploded parts diagrams that appear on p. 4-17, the boom, boom sleeve, supporting frame and fork
pockets are referred to together as “Boom, base frame weldment”.
[Models that use safety straps instead of chains]
Boom
sleeve
Boom
sleeve
Supporting
frame
Supporting
frame
Safety strap
snap hook
attachment
p
oints
Safety strap
01/11 rev. 3/12/2013 LM-series fork-mountable booms
FIG. 1A: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-1T-4K, 6K, & 8K MODELS
Item No.
5
Part No. Description Quantity
1
08-215-111
08-514-028
08-514-115
Boom, base frame weldment:
LM-1T-4k
LM-1T-6k
LM-1T-8k
1
1
1
2 08-145-008 Snap Hook 1
3
08-145-003
08-145-004
08-145-004
Shackle
LM-1T-4k: 2-ton max. rated load
LM-1T-6k: 3-ton max. rated load
LM-1T-8k: 4-ton max. rated load
1
1
1
4
08-145-001
08-145-002
08-145-002
Load hook
LM-1T-4k: 2-ton max. rated load swivel hook
LM-1T-6k: 3-ton max. rated load swivel hook
LM-1T-8k: 4-ton max. rated load
1
1
1
5
08-145-010
08-145-004
08-145-006
Shackle
LM-1T-4k: 2-ton max. rated load
LM-1T-6k: 3-ton max. rated load
LM-1T-8k: 5-ton max. rated load
1
1
1
6
08-145-009
08-145-002
08-145-005
Load hook
LM-1T-4k: 2-ton max. load clevis grab hook
LM-1T-6k: 3-ton max. rated load swivel hook
LM-1T-8k: 5-ton max. rated load D-fork hook
1
1
1
7 08-025-004 X-handle locking bolt 1
8
11211
11209
Support leg connecting bolt
LM-1T-4k & 6K: ½” – 13 x 2” UNC Z-plated bolt
LM-1T-8k: ½” -13 x 1-1/2” HHCS Z-plated bolt
1
1
9
36109
36110
Support leg nut
LM-1T-4k & 6K: ½” -13 UNC hex nut
LM-1T-8k: ½” -13 Z-plated hex nut
1
1
10
08-014-134
08-514-117
Front support leg
LM-1T-4k & 6K: casting
LM-1T-8k: weldment
1
1
11 99-145-025 3/16” x 36” safety chain 1
7
9
3
4
8
5
6
10
2
11
1
LM-series fork-mountable booms 01/11
FIG. 1B: LM-1T- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD RATINGS FOR VARYING
LOAD ATTACHMENT POINT AND BOOM EXTENSION COMBINATIONS
Page 6 of 27
Copyright 2013 Vestil Manufacturing Corp.
FIG. 1B: LM-1T- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD R
A
TINGS FOR
VARYING LOAD ATTACHMENT POINT AND BOOM EXTENSION COMBINATIONS
The center of gravity has a vertical component as well as a horizontal component. The vertical center of gravity is
located 15.5 in. (~39.4cm) above the bottom edges of the fork pockets. The horizontal component ranges from 31
inches to 47 inches measured from the outer edges of the fork pockets. As shown in the diagram above:
Retracted horizontal center of gravity (RHCG): boom fully retracted with a load attached at position A, the center
of gravity is located 31 inches (~79 cm) from the outer edges of the fork pockets;
Extended horizontal center of gravity (EHCG): fully extended with a load attached at position J, the center of
gravity is located 47 inches (~119 cm) from the outer edges of the fork pockets.
All other combinations (of boom extension and load position) yield horizontal centers of gravity located at or
between RHCG and EHCG.
Model EHCG RHCG VCG
LM-1T-4k 49½ in. (~126cm) 32 5/16 in. (~82cm) 13 5/16 in. (~34cm)
LM-1T-6k 46
5/16 in. (~123cm) 30 5/8 in. (~78cm) 12 3/8 in. (~31cm)
LM-1T-8k 47 in. (~119cm) 31 in. (~79cm) 15 ½ in. (~cm)
RHCG
VCG
EHCG
VCG
RHCG
LM-series fork-mountable booms 01/11
FIG. 1C: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-1NT-4K, 6K, & 8K MODELS
Item
No.
Part No. Description Quantity
1
08-514-128
5
8
4
3
7
9
6
2
10
1
Page 7 of 27
08-514-129
08-514-130
Boom, base frame weldment
LM-1NT-4k
LM-1NT-6k
1
LM-1NT-8k
2 08-145-008 Snap hook 1
3
08-145-003
08-145-004
Shackle
LM-1NT-4k: 2-ton max. rated load
LM-1NT-6k: 3-ton max. rated load
LM-1NT-8K: 3-ton max. rated load
1
1
1
08-145-004
4
08-145-001
08-145-002
08-145-002
Load hook
LM-1NT-4k: 2-ton max. rated load
LM-1NT-6k: 3-ton max. rated load
LM-1NT-8k: 3-ton max. rated load
1
1
1
5
08-145-010
08-145-004
08-145-006
Shackle
LM-1NT-4k: 2-ton max. rated load
LM-1NT-6k: 3-ton max. rated load
LM-1NT-8k: 5-ton max. rated load
1
1
1
6
08-145-009
08-145-002
08-145-005
Load hook
LM-1NT-4k: 2-ton max. rated load
LM-1NT-6k: 3-ton max. rated load
LM-1NT-8k: 5-ton max. rated load
1
1
1
7
11211
11209
Support leg connecting bolt
LM-1NT-4k & 6k: ½” – 13 x 2” UNC Z-plated bolt
LM-1NT-8k: ½” – 13 x1-1/2” HHCS Z-plated bolt
1
1
8
36109
36110
Support leg nut
LM-1NT-4k & 6k: ½” – 13 UNC hex nut
LM-1NT-8k: ½” -13 Z-plated hex nut
1
1
9
08-014-134
08-514-117
Front support leg
LM-1NT-4k & 6K: casting
LM-1NT-8K: weldment
1
1
10 99-145-025 3/16” x 36” safety chain 1
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
Model HCG VCG
LM-1NT-4k 28
11/16 in. (~73cm) 10 13/16 in. (~27½ cm)
LM-1NT-6k 27 in. (~69cm) 10 13/16 in. (~27½ cm)
LM-1NT-8k 30
3/8 in. (~77cm) 11 ¾ in. (~30cm)
Center of gravity has both a horizontal component and a vertical component. The vertical center of gravity (VCG)
lies along a line 15.5 inches (~39.4 cm) from the bottom edges of the fork pockets. Similarly, the horizontal center of
gravity (HCG) is located 31 inches (~79 cm) from the outer edges of the fork pockets.
FIG. 1D: LM-1NT- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD R
A
TINGS FOR
VARYING LOAD ATTACHMENT POINTS
HCG
VCG
Page 8 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 2A: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-OBT-4K, 6K, & 8K MODELS
Item
No.
5
Part No.
Description
Quantity
1
08-514-119
08-514-122
08-514-125
Boom, base frame weldment
LM-OBT-4k
LM-OBT-6k
LM-OBT-8k
1
1
1
2 08-145-008 Snap hook 1
3
08-145-010
08-145-004
08-145-006
Shackle
LM-OBT-4k: 2-ton max. rated load
LM-OBT-6k: 3-ton max. rated load
LM-OBT-8k: 5-ton max. rated load
1
1
1
4
08-145-009
08-145-002
08-145-005
(Swivel) Load hook
LM-OBT-4k: 2-ton max. rated load
LM-OBT-6k: 3-ton max. rated load
LM-OBT-8k: 5-ton max. rated load
1
1
1
5
08-145-003
08-145-004
Shackle
LM-OBT-4k: 2-ton max. rated load
LM-OBT-6k & 8k: 3-ton max. rated load
1
1
6
08-145-001
08-145-002
Load hook
LM-OBT-4k: 2-ton max. rated load
LM-OBT-6k & 8k: 3-ton max. rated load
1
1
7 08-146-002 Boom pivoting spring 1
8 99-145-025 3/16” x 36” safety chain 1
9 13-025-003 1-1/8” grip (white 208) 1
6
7
9
3
4
2
8
1
Page 9 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
The center of gravity has a vertical component as well as a horizontal component. The vertical center of gravity is
located 13 in. (~33 cm) above the bottom edges of the fork pockets. The horizontal component ranges from 28 inches
to 47 inches measured from the outer edges of the fork pockets. As shown in the diagram above:
Retracted horizontal center of gravity (RHCG): boom fully retracted with a load attached at position A, the
center of gravity is located 28 inches (~71 cm) from the outer edges of the fork pockets;
Extended horizontal center of gravity (EHCG): fully extended with a load attached at position J, the center
of gravity is located 41-1/2 inches (~105 cm) from the outer edges of the fork pockets.
All other combinations (of boom extension and load position) yield horizontal centers of gravity located at
or between RHCG and EHCG.
FIG. 2B: LM-OBT- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD RATINGS FOR VARYING LOAD
ATTACHMENT POINT AND BOOM EXTENSION COMBINATIONS
RHCG
EHCG
VCG
Model EHCG RHCG VCG
LM-OBT-4k 47
1/8 in. (~120cm) 31 13/16 in. (~81cm) 14 3/8 in. (~36 ½ cm)
LM-OBT-6k 44
3/16 in. (~112cm) 31 in. (~79cm) 14 3/8 in. (~36 ½ cm)
LM-OBT-8k 51
11/16 in. (~131cm) 35 in. (~89cm) 15 ¼ in. (~39cm)
LM-OBT-4k
LM-OBT-6k
LM-OBT-8k
Page 10 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 2C: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-OBNT-4K, 6K, & 8K MODELS
Item No. Part No. Description Quantity
1
08-514-132
08-514-135
08-514-136
Boom, base frame weldment
LM-OBNT-4k
LM-OBNT-6k
LM-OBNT-8k
1
1
1
2 08-145-008 Snap hook 1
3
08-145-010
08-145-004
08-145-006
Shackle
LM-OBNT-4k: 2-ton max. rated load
LM-OBNT-6k: 3-ton max. rated load
LM-OBNT-8k: 5-ton max. rated load
1
1
1
4
08-145-009
08-145-002
08-145-005
Load hook
LM-OBNT-4k: 2-ton max. rated load
LM-OBNT-6k: 3-ton max. rated load
LM-OBNT-8k: 5-ton max. rated load
1
1
1
5
08-145-003
08-145-004
08-145-004
Shackle
LM-OBNT-4k: 2-ton max. rated load
LM-OBNT-6k: 3-ton max. rated load
LM-OBNT-8k: 3-ton max. rated load
1
1
1
6
08-145-001
08-145-002
08-145-002
Load hook
LM-OBNT-4k: 2-ton max. rated load
LM-OBNT-6k: 3-ton max. rated load
LM-OBNT-8k: 3-ton max. rated load
1
1
1
7 08-146-002 Boom pivoting spring 1
8 99-145-025 3/16” x 36” Safety chain 1
9 13-025-003 1-1/8” grip (white 208) 1
1
7
5
6
2
8
9
3
4
Page 11 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 2D: LM-OBNT- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD R
A
TINGS FOR
VARYING LOAD ATTACHMENT POINTS
Center of gravity has both a horizontal component and a vertical component. The vertical center of gravity (VCG)
lies along a line 15 inches (~38 cm) from the bottom edges of the fork pockets. Similarly, the horizontal center of
gravity (HCG) is located 35-7/8 inches (~91 cm) from the outer edges of the fork pockets.
HCG
VCG = 15 in.
m) (~38c
VCG
Model HCG VCG
11 5/8 in. (~29 ½ cm) LM-OBNT-4k 26 ¾ in. (~68cm)
11 5/8 in. (~29 ½ cm) LM-OBNT-6k 26 ¾ in. (~68cm)
LM-OBNT-8k 30
3/8 in. (~77cm) 11 7/16 in. (~29cm)
Page 12 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 3A
: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-HRT-4K & 6K MODELS
Item
No.
Part No.
Description
Quantity
1
08-514-005
08-514-006
Boom, base frame weldment
LM-HRT-4k
LM-HRT-6k
1
1
2 08-145-008 Snap hook 1
3 08-025-004 X-handle locking bolt 1
4
08-145-003
08-145-004
Shackle
LM-HRT-4k: 2-ton max. rated load
LM-HRT-6k: 3-ton max. rated load
1
1
5
08-145-001
08-145-002
Load hook
LM-HRT-4k: 2-ton max. rated load
LM-HRT-6k: 3-ton max. rated load
1
1
6
08-145-010
08-145-004
Shackle
LM-HRT-4k: 2-ton max. rated load
LM-HRT-6k: 3-ton max. rated load
1
1
7
08-145-009
08-145-002
Load hook
LM-HRT-4k: 2-ton max. rated load
LM-HRT-6k: 3-ton max. rated load
1
1
8 99-145-025 3/16” x 36” safety chain 1
3
4
5
6
7
2
8
1
Page 13 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
The center of gravity has a vertical component as well as a horizontal component. The vertical center of gravit
y
(VCG) is located 38 inches (~97 cm) from the bottom edges of the fork pockets. The horizontal center of gravit
y
(HCG) ranges from 3 inches up to 8 inches from the front edge of the vertical support. As depicted in the diagra
m
above:
Retracted horizontal center of gravity (RHCG): boom fully retracted, with a load attached at position A, th
e
horizontal center of gravity is located 8 inches (~20cm) from the front edge of the vertical support;
Extended horizontal center of gravity (EHCG): boom fully extended, with a load attached at position I, th
e
center of gravity is located 3 inches (~7.6cm) from the front edge of the vertical support.
A
ll other combinations of boom extension and load position yield horizontal centers of gravity located
3
inches to 8 inches from the front edge of the vertical support. (See “Range of possible horizontal center
s
of gravity” in diagram above).
FIG. 3B: LM-HRT- 4K & 6K CENTERS OF GRAVITY AND MAXIMUM LOAD R
A
TINGS FOR
VARYING LOAD ATTACHMENT POINT AND BOOM EXTENSION COMBINATIONS
VCG
EHCG
Model EHCG RHCG VCG
LM-HRT-4k 3 in. (~7.6 cm) 8 in. (~20 cm) 38 in. (~97 cm) RHCG
LM-HRT-6k 3 in. (~7.6 cm) 8 in. (~20 cm) 38 in. (~97 cm)
Page 14 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 3C
: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-HRNT-4K & 6K MODELS
3
5
4
6
Item No. Part No. Description Quantity
1
08-514-007
08-514-022
Boom, base frame weldment
LM-HRNT-4k
LM-HRNT-6k
1
1
2 08-145-008 Snap hook 1
3
08-145-003
08-145-004
Shackle
LM-HRNT-4k: 2-ton max. rated load
LM-HRNT-6k: 3-ton max. rated load
1
1
4
08-145-001
08-145-002
Load hook:
LM-HRNT-4k: 2-ton max. rated load
LM-HRNT-6k: 3-ton max. rated load
1
1
5
08-145-010
08-145-004
Shackle
LM-HRNT-4k: 2-ton max. rated load
LM-HRNT-6k: 3-ton max. rated load
1
1
6
08-145-009
08-145-002
Hook
LM-HRNT-4k: 2-ton hook
LM-HRNT-6k: 3-ton max. rated load
1
1
7 99-145-025 3/16” x 36” safety chain 1
1
2
7
Page 15 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 3D: LM-HRNT- 4K & 6K CENTERS OF GRAVITY AND MAXIMUM LOAD RATINGS FOR
VARYING LOAD ATTACHMENT POINTS
= Center of gravity
Center of gravity has both a horizontal component and a vertical component. The vertical center of gravity (VCG) lies
along a line 38 inches (~97 cm) from the bottom edges of the fork pockets. Similarly, the horizontal center of gravity
(HCG) is located 8 inches (~20cm) from the front edge of the vertical support.
Model HCG VCG
LM-HRNT-4k 12
1/8 in. (~31cm) 37 3/16 in. (~94 ½ cm)
LM-HRNT-6k 12
1/8 in. (~31cm) 37 3/16 in. (~94 ½ cm)
Page 16 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 4A: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-EBT-4K, 6K & 8K MODELS
2
3
1
4
5
6
7
Item
No.
Part No.
Description
Quantity
1
08-514-001
08-514-028
08-514-192
Boom, base frame weldment
LM-EBT-4k
LM-EBT-6k
LM-EBT-8k
1
1
1
2 08-025-004 X-handle locking bolt 1
3
08-145-003
08-145-004
08-145-004
Shackle
LM-EBT-4k: 2-ton max. rated load
LM-EBT-6k: 3-ton max. rated load
LM-EBT-8k: 3-ton max. rated load
1
1
1
4
08-145-001
08-145-002
08-145-002
Load hook
LM-EBT-4k: 2-ton max. rated load
LM-EBT-6k: 3-ton max. rated load
LM-EBT-8k: 3-ton max. rated load
1
1
1
5
08-145-010
08-145-004
08-145-006
Shackle
LM-EBT-4k: 2-ton max. rated load
LM-EBT-6k: 3-ton max. rated load
LM-EBT-8k: 5-ton max. rated load
1
1
1
6
08-145-009
08-145-002
08-145-005
Load hook
LM-EBT-4k: 2-ton max. rated load
LM-EBT-6k: 3-ton max. rated load
LM-EBT-8k: 5-ton max. rated load
1
1
1
7 08-145-028
99-145-025
LM-EBT-4k & 6k: safety strap
LM-EBT-8k: 3/16” x 36” safety chain
1
1
Page 17 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 4B: LM-EBT – 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD RATINGS FOR
VARYING LOAD ATTACHMENT POINT AND BOOM EXTENSION COMBINATIONS
The center of gravity of the boom ranges between a minimum of 34.5 inches and a maximum of 54.5 inches from
the outer edges of the fork pockets. As shown in the diagram above, the horizontal center of gravity may be located at
any point from RHCG to EHCG:
RHCG [stands for “Retracted horizontal center of gravity”]: boom fully retracted, and load attached at position A,
the center of gravity is located 34.5 inches (~88cm) from the outer edges of the fork pockets;
Extended horizontal center of gravity (EHCG): fully extended with a load attached at position J, the center of
gravity is located 54.5 inches (~138cm) from the outer edges of the fork pockets.
All other combinations of boom extension and load position produce a horizontal center of gravity located
somewhere between RHCG and EHCG.
Outer edges of
fork pockets
EHCG
VCG
RHCG
Model EHCG RHCG VCG
LM-EBT-4k 56
1/2 in. (~143 ½ cm) 4 7/16 in. (~11 cm) 36 in. (~91 ½ cm)
LM-EBT-6k 56
1/2 in. (~143 ½ cm) 4 7/16 in. (~11 cm) 36 in. (~91 ½ cm)
LM-EBT-8k 57
1/8 in. (~145 cm) 4 13/16 in. (~12cm) 38 in. (~96 ½ cm)
Page 18 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 4C: EXPLODED PARTS DIAGRAM & PARTS LIST FOR LM-EBNT-4K, 6K & 8K MODELS
Item
No.
Part No.
Description
Quantity
1
08-514-003
08-514-004
08-514-191
Boom, base frame weldment
LM-EBNT-4k
LM-EBNT-6k
LM-EBNT-8k
1
1
1
2
08-145-008
Snap hook
1
3
08-145-003
08-145-004
08-145-004
Shackle
LM-EBNT-4k: 2-ton max. rated load
LM-EBNT-6k: 3-ton max. rated load
LM-EBNT-8k: 3-ton max. rated load
1
1
1
4
08-145-001
08-145-002
08-145-002
Hook
LM-EBNT-4k: 2-ton max. rated load
LM-EBNT-6k: 3-ton max. rated load
LM-EBNT-8k: 3-ton max. rated load
1
1
1
5
08-145-010
08-145-004
08-145-006
Shackle
LM-EBNT-4k: 2-ton max. rated load
LM-EBNT-6k: 3-ton max. rated load
LM-EBNT-8k: 5-ton max. rated load
1
1
1
6
08-145-009
08-145-002
08-145-005
Hook
LM-EBNT-4k: 2-ton max. rated load
LM-EBNT-6k: 3-ton max. rated load
LM-EBNT-8k: 5-ton max. rated load
1
1
1
7 99-145-025 3/16” x 36” Safety chain 1
1
7
5
6
3
4
2
8
9
Page 19 of 27
Copyright 2013 Vestil Manufacturing Corp.
LM-series fork-mountable booms 01/11
FIG. 4D: LM-EBNT- 4K, 6K & 8K CENTERS OF GRAVITY AND MAXIMUM LOAD R
A
TINGS
FOR VARYING LOAD ATTACHMENT POINTS
HCG
VCG
Center of gravity has both a horizontal component and a vertical component. The vertical center of gravity
(VCG) lies along a line 15 inches (~38 cm) from the bottom edges of the fork pockets. Similarly, the horizontal
center of gravity (HCG) is located 35-7/8 inches (~91 cm) from the outer edges of the fork pockets.
Model HCG VCG
LM-EBNT-4k 32
1/16 in. (~81 ½ cm) 3 15/16 in. (~10 cm)
LM-EBNT-6k 30
1/8 in. (~76 ½ cm) 3 5/8 in. (~9 cm)
4 1/16 in. (~10 cm) LM-EBNT-8k 32 ¼ in. (~82 cm)
Page 20 of 27
Copyright 2013 Vestil Manufacturing Corp.
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
/
