ACI Hoist & Crane MLH-005 User manual

Mini Lever Chain Hoist
Lever Hoists PAGE: 1
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
OPERATION MANUAL
This operation manual is intended as an instruction manual for trained personnel
Responsible for the installation, maintenance, repair, etc. of this equipment.
Before equipment use, please read this operation manual carefully.
Serial Number: ______________________________
Date Purchased: ____________________________

Lever Hoists PAGE: 2
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
TABLE OF CONTENTS
1.0 WARRANTY.............................................................................................................................................................................. 3
2.0 SAFETY PRECAUTIONS.............................................................................................................................................................. 4
2.1 Safety Alert Symbols ................................................................................................................................................................. 4
3.0 GENERAL DESCRIPTION............................................................................................................................................................ 5
3.1 Hoist Construction .................................................................................................................................................................... 5
4.0: PREPARATION & PROCEDURES ................................................................................................................................................ 6
4.1 Prepare for use ......................................................................................................................................................................... 6
4.2 Attachment Points .................................................................................................................................................................... 6
4.3 Mounting the Hoist................................................................................................................................................................... 6
4.4 Pre-Operational Checks & Trial Operation................................................................................................................................ 6
5.0 OPERATING INSTRUCTIONS...................................................................................................................................................... 6
5.1 Hoisting (Pulling & Lifting) and Lowering.................................................................................................................................. 6
5.2 Hoist Operation: Free Chain...................................................................................................................................................... 7
5.2.1 Principle ...................................................................................................................................................................... 7
5.2.2: Operation .................................................................................................................................................................. 7
6.0: PRECAUTIONS WHILE OPERATING ........................................................................................................................................... 8
6.1 Warnings................................................................................................................................................................................... 8
6.2 Attaching the Load.................................................................................................................................................................... 8
7.0: ROUTINE CARE, INSPECTION, AND MAINTENANCE .................................................................................................................. 8
7.1 General ..................................................................................................................................................................................... 8
7.2 Inspection Classification ........................................................................................................................................................... 9
7.2.1 Frequent/Visual Inspection......................................................................................................................................... 9
7.3 Frequent Inspection................................................................................................................................................................ 10
7.4 Periodic Inspection ................................................................................................................................................................. 10
7.5 Inspection Schedule................................................................................................................................................................ 10
7.6 Chain Inspection ..................................................................................................................................................................... 11
7.7 Hook Inspection...................................................................................................................................................................... 11
7.8 Reject Opening........................................................................................................................................................................ 11
7.9 Storage.................................................................................................................................................................................... 11
7.10 Lubrication ............................................................................................................................................................................ 11
7.10.1: Recommended Lubricants ..................................................................................................................................... 12
8.0: TROUBLESHOOTING GUIDE ................................................................................................................................................... 13
9.0 DIMENSIONS & SPECIFICATIONS............................................................................................................................................. 14
10.0: EXPLODED VIEW & PARTS LIST ............................................................................................................................................ 15
10.1 Exploded View ...................................................................................................................................................................... 15
10.2 Parts List................................................................................................................................................................................ 16

Lever Hoists PAGE: 3
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
1.0 WARRANTY
Every product is thoroughly inspected and tested before it is shipped from the factory. If any problem develops within one year,
return the product prepaid to the factory. If an inspection reveals that the problem is caused by defective workmanship or material,
repairs will be made without charge and the product will be returned with the shipping prepaid.
Excluded Items
This warranty does not cover:
•Deterioration caused by normal wear, abuse, chemical or abrasive actions, improper maintenance, or excessive heat.
•Problems resulting from repairs, modifications, or alterations made by people other than factory or ACI representatives.
•If the product has been abused or damaged due to an accident.
•If repair parts or accessories other than ACI equipment are used on the product; they are warranted only to the extent that
they are warranted by the manufacturer of said parts or accessories.
Remarks
EXCEPT AS STATED HERE, ACI MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES FOR A PARTICULAR
PURPOSE.
Alterations or modifications of equipment and use of non-factory repair parts
can lead to dangerous operation and injury.
To avoid injury:
DO NOT alter or modify equipment.
DO NOT use equipment to lift, support or otherwise transport people.
DO NOT suspend unattended loads over people.

Lever Hoists PAGE: 4
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
2.0 SAFETY PRECAUTIONS
2.1 Safety Alert Symbols
Throughout this manual are steps and procedures that can prevent hazardous situations, the following symbols are used to identify
the degree or level of hazard seriousness.
DANGER, WARNING AND CAUTION NOTICE
Symbol
Description
Danger
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury and property
damage.
Warning
Indicates an imminently hazardous situation which, if not
avoided, could result in death or serious injury and property
damage.
Caution
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury or property
damage.
Notice
Notifies people of installation, operation or maintenance
information which is important but not directly hazard related.
Failure to read and comply with any of the limitations noted in this manual can result in serious bodily injury or
death, and/or property damage.

Lever Hoists PAGE: 5
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
3.0 GENERAL DESCRIPTION
This document provides information and maintenance of ACI Lever Hoist/ Puller. Operators and persons maintaining the hoist
should be familiar with this manual. Following the precautions, procedures and maintenance practices in this manual should ensure
long and reliable operation.
People responsible for the installation operation, and or maintenance of the hoisting equipment should be familiar with the
American National Standard ANSI B30.21 for guidelines on the safe operation of lever hoists. That document contains rules on
inspection requirements and records that may be required by some of the regulatory agencies.
3.1 Hoist Construction
The Steel Body Lever Hoist/ Puller is a dependable way to accurately position heavy loads, loading and lifting freely suspended loads
within the hoist’s rated load. The reversing lever and free-chain wheel provide an ease of control, even with work gloves. The hoist
can be used in confined spaces due to the short handle and low handle chair.

Lever Hoists PAGE: 6
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
4.0: PREPARATION & PROCEDURES
4.1 Prepare for use
When unpacking the hoist, inspect carefully for any damage that may have occurred during shipping. Check for loose, missing, or
damaged parts.
Lubricate the chain along the whole length with a good quality chain and wire rope lubricant. Make sure the structures supporting
the hoist are strong enough to support the entire rated load.
4.2 Attachment Points
WARNING: Prior to attaching the hoist ensure that all attachment points, suspension components and supporting structure are
adequate to support the hoist and its load. If necessary, consult a professional that is qualified to evaluate the adequacy of the
suspension location and its supporting structure.
4.3 Mounting the Hoist
•Hook Mounted to a Fixed Location – Attach the hoist’s top hook to the fixed suspension point.
•Ensure that the fixed suspension point resets on the center of the hook’s saddle and that the hook’s latch is engaged.
4.4 Pre-Operational Checks & Trial Operation
•Confirm the adequacy of the rated capacity for all slings, chains, wire ropes and all other lifting attachments before use.
Inspect all load suspension members damage prior to use and replace or repair all damages parts.
•Verify and correct all chain irregularities prior to operating the hoist.
•Record the hoist’s Model Number & Serial Number (from the plate on the hoist).
•Ensure that the hoist is properly installed to a fixed point.
•Ensure that all nuts, bolts, and split pins (cotter pins) are sufficiently fastened.
•Confirm proper operation
oBefore operating read and become familiar with Operation.
oBefore Operating ensure that the hoist meets the Inspection, Testing, and Maintenance requirements of
ANSI/ASME B30.21.
oBefore operating ensure that nothing will interfere with the full range of the hoist’s operation.
5.0 OPERATING INSTRUCTIONS
5.1 Hoisting (Pulling & Lifting) and Lowering
To lift or pull a load, turn the reversing lever to the UP position and move the handle in a clockwise direction. To lower a suspended
load, turn the reversing lever to the DOWN position and move the handle in a counterclockwise direction.
CAUTION: With no load on the hoist, reciprocating the handle may result in only a back-and-forth movement of the chain with no
overall hook movement. When this happens, the chain may be positioned by applying a light pull in the chain with the free hand, or
by using the free chain feature.

Lever Hoists PAGE: 7
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
5.2 Hoist Operation: Free Chain
5.2.1 Principle
•Free chaining allows the load chain to be moved freely because the brake is released under no load situations.
•Pulling the free knob actuates the internal spring to release the mechanical brake allowing the load chain to be pulled in
either direction to the desired length.
•The brake is engaged during lowering or lifting the load.
5.2.2: Operation
•DO NOT operate the hoist Free Knob while a load is applied to the hoist.
•DO NOT touch the hoist Free Knob during lifting or lowering of the load.
•ALWAYS check that the selector is placed in the proper position.
•Set the Selector to the “N” position. The Selector is located under the Free Knob on the hand lever.
•Pull the Free Knob pout. The Free Knob turns counterclockwise and “snaps” out.
•Pull the load chain to move the hook to the desired position.
•DO NOT pull the chain suddenly in the free chain mode. Excessive pulling may set the brake and not allow the load chain to
move. If this occurs the hoist must be reset.
•To reset the hoist to operate, rotate the Free Knob clockwise while pulling lightly on the load side chain. Once slack is
removed, the Free Knob “snaps” in. This resets the brake and allows the hoist to be operated with the hand lever.
•DO NOT attempt to use the free-chain feature while there is any load on the hoist.
Table 5.2.2.1
Lever Hoist Operation
Selector Position
Lever Rotation
Load Movement
UP
Clockwise
Lift
DOWN Counterclockwise Lower
Table 5.2.2.2
Signal Warnings
Signal Color
Load Status
Instructions
Green
Safe Load
Continue Operation
Red
Overload
DO NOT Continue Operation

Lever Hoists PAGE: 8
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
6.0: PRECAUTIONS WHILE OPERATING
6.1 Warnings
•Do not lift or pull more than the rated capacity.
•Do not use a handle extension (cheater bar). The hoist is designed to pull rated loads with low handle effort. If a cheater bar
seems necessary to lift the load, the hoist is overloaded.
•Stand clear of the load at all times. The operator should have sufficient room to use the hoist without endangering himself.
6.2 Attaching the Load
1. Be sure there are no twists in the load chain as it enters the hoist. This condition should be constantly checked on double
chain hoists because it is possible for the load block to be "capsized" or flipped over one or more times, putting twists in the
chain. The presence of a twist may not be obvious when the hook block is in the lowered position but can cause serious
chain binding when the hook is in its fully raised position.
2. Never load on the end of the hook. Use attachments that will seat in the saddle of the hook
3. Make sure that slings and other rigging are in good condition and have sufficient capacity. Never wrap the hoist chain
around a load.
**DO NOT OPERATE THE HOIST FROM AN OFF-BALANCE POSITION.
OPERATOR SHOULD HAVE FIRM FOOTING OR BE OTHERWISE SECURED BEFORE OPERATING THE HOIST.
Check the hoist each time it is used by lifting the load just clear of its supports and checking to be sure that the load is secure in the
hook and that the hoist brake is holding the load without slipping.
•Never raise the hook block into the bottom of the hoist or run the hook down until the slack chain is pulled tight.
•Never attempt to free-chain the hoist with any load on the hook.
•Do not leave a suspended load unattended.
•Do not throw or drop the hoist or drag it along the ground.
•Do not use a damaged or malfunctioning hoist.
Lifting a load with two hoists is not recommended. If unavoidable, care must be taken that neither hoist is overloaded.
7.0: ROUTINE CARE, INSPECTION, AND MAINTENANCE
7.1 General
The inspection procedure herein is based on ANSI/ASME B30.21. The following definitions are from ANS/ASME B30.21 and pertain
to the inspection procedure below.
•Designated Person: a person selected or assigned as being competent to perform the specific duties to which he/she is
assigned.
•Qualified Person: a person who, by possession of a recognized degree or certificate of professional standing, or who, by
extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems
relating to the subject matter and work.

Lever Hoists PAGE: 9
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
•Normal Service: that distributed service which involves operation with randomly distributed loads within the related load
limit, or uniform loads less than 65% of rated load for not more than 15% of the time.
•Heavy Service: that service which involves operation within the rated load limit which exceeds normal service.
•Severe Service: that service which involves normal or heavy service with abnormal operating conditions.
7.2 Inspection Classification
Table 7.2.1
Inspection Classification
TYPE
DESCRIPTION
Initial Inspection Prior to initial use, all new, altered, or modified hoists shall be inspected by a designated
person to ensure compliance with the applicable provisions of this manual
Inspection
Classification
The inspection procedure for hoists in regular service is divided into two general
classifications based upon the intervals at which inspection should be performed. The
intervals in turn are dependent upon the intervals at which inspection should be
performed. The intervals in turn are dependent upon the nature of the critical components
of the hoist and the degree of their exposure to wear, deterioration, or malfunction. The
two general classifications are herein designated as FREQUENT and PERIODIC, with
respective intervals between inspections as defined below.
7.2.1 Frequent/Visual Inspection
Frequent inspections are visual examinations by the operator or other designated personnel with interval per the following criteria.
•Normal Service – Monthly
•Heavy Service – Weekly to Monthly
•Severe Service – Daily to Weekly
•Special or Infrequent Service – As recommended by a qualified person before and after each occurrence.
Visual inspection will be performed by a qualified person who will make records of apparent external conditions to provide the basis
for a continuing evaluation.
A qualified person shall determine whether conditions found during inspection constitute a hazard and whether maintenance of the
equipment is required.
•Normal Service – Yearly
•Heavy Service – Semi-Annually
•Severe Service – Quarterly
•Special or Infrequent Service – As recommended by a qualified person before and after each occurrence.
Written, dated and signed inspection reports should be maintained on all critical items, such as safety devices, brakes, hooks, ropes,
chains, etc. All worn, damaged or malfunctioning parts should be repaired or replaced to maintain a SAFE operating hoist. Warning
labels affixed to the hoist or trolley should be kept clean and visible at all times. Warning labels should be replaced if loose or
illegible.

Lever Hoists PAGE: 10
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
7.3 Frequent Inspection
•All functional operating mechanisms for proper operation and adjustment, maladjustment and unusual sounds.
•Hoist braking system for proper operation
•Hooks and latches in accordance with ANSI/ASME B30.10
•Hook latch operation
•Load chain reeving for compliance
•Hoist Lever for bends and cracks
•Hoist support for damage
7.4 Periodic Inspection
•Requirement of frequent inspection
•Evidence of loose, bolts, nuts, or rivets.
•Evidence of worn, corroded, cracked, or distorted parts such as load blocks, suspension housing, chain attachments,
clevises, yokes, suspension bots, shafts, gears, bearings, pins, rollers and locking and clamping devices.
•Evidence of damage to hook retaining nuts or collars and pins, and welds or rivets used to secure the retaining members.
•Evidence of damage or excessive wear of load and idler sheaves
•Evidence or worn, glazed or oil contaminated friction disks; worn pawls, cams or ratchet; corroded, stretched, or broken
pawl springs in brake mechanism.
•Evidence of damage to supporting structure
•Function label on hoist for legibility
•Warning label properly attached to the hoist and legible
•End connections of load chain stopper link
7.5 Inspection Schedule
Table 7.5.1
Inspection Schedule
Interval
Inspection
Daily
a. Check the hooks and the hook latches for cracks or deformities. Twisted hooks
or hooks with throat openings more than the reject openings listed in Table 5-1
should be replaced.
b. Check chain for wear and twisting.
c. Check brake for drift.
Quarterly a. Check for loose screws, nuts, etc.
b. Check load sprocket and hand chain wheel for wear.
Annually
a. Inspect for worn gears, pawl, spring, ratchet and shafts.
b. Check for worn break discs.
c. Inspect chain in kerosene or other non-corrosive solvent and inspect for wear,
nicks, or distortion of any kind.

Lever Hoists PAGE: 11
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
7.6 Chain Inspection
Inspect the chain for wear or corrosion. Push Links together and inspect the mating surface between the links. Pay special attention
to the links that most often through the hoist.
7.7 Hook Inspection
Inspect the hooks for deformation, chemical damage and cracks. Hooks damaged having a throat opening greater than the reject
opening (shown below) must be replaced.
7.8 Reject Opening
Table 7.8.1
Reject Opening Sizes
Capacity (ton)
Standard dimension (in)
Reject Opening (in)
3/4
1.10
> 1.21
1 1/2
1.32
> 1.45
3
1.57
> 1.73
6 1.67 > 1.84
7.9 Storage
•Never leave or store the hoist with the brake locked. Loosen the brake by operating the hoist as if lowering a load.
•Avoid leaving the hoist in a wet or corrosive environment. Clean and dry the hoist before storage whenever it has been
exposed to dirt or water.
•Inspect the hoist for signs of wear, damage, or malfunctioning parts. Do not return a defective hoist to a storage area
without clearly marking it as defective.
7.10 Lubrication
a. a. Good lubrication is vital to long chain life. The chain should be kept well-oiled with chain Lubricant. Be sure that the oil is
worked into the area between the links.
b. b. If the hoist is disassembled for inspection or repair re-lubricate the moving parts according to the Lubricant table.
If the chain is worn or damaged, replace the entire chain
with new chain supplied by the hoist manufacturer. Do
not substitute. Do not attempt to weld chain or use
connecting links.

Lever Hoists PAGE: 12
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
Table 7.10.1
Lubrication Schedule
PART
DESCRIPTION
FREQUENCY
Gears, bearings Check operation of the part Annually
Pawl pivot pin, guide
roller pin and hook
shanks
Check operation of the part Annually
Chain wheel treads
Check operation of the part
Quarterly
Chain
Lubricate chain, under normal usage
Lubricate chain, under heavy usage require to be
lubricated more frequently
Weekly
7.10.1: Recommended Lubricants
Table 7.10.1.1
Recommended Lubricants
Part Lubricant
Gears, bearings, pawl pivot pin, guide roller
pin, hook shanks, and chain wheel treads Any good quality gear grease
Chain Chain Lube
Brake parts, ratchet teeth
Do not Lubricate
The brake surfaces must be kept free of any trace
of oil or grease. Apply lubricant sparingly to the
parts near the brake to avoid oil contamination of
the brake.

Lever Hoists PAGE: 13
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
8.0: TROUBLESHOOTING GUIDE
Problem
Possible Causes
Corrective Action
Pinion shaft does not return to
position after free chaining.
1. Wear of the spline section of the
pinion shaft.
2. Deformation or damage of the
return spring.
3. Mechanism fouled with foreign
matter such as dirt and dust.
Replace with new parts.
Replace with new parts.
Disassemble and clean.
Slip caused by ineffective braking.
1. Worn out friction discs.
2. Oil on the braking surface.
3. Incorrect assembly of the brake
system.
Replace with new ones.
Disassemble and clean.
Assemble correctly.
Load dropped while lowering. 1. Damaged friction discs.
2. Foreign matter in the braking
system.
Replace with new ones.
Disassemble and clean.
Jammed operating handle.
Over-tightening of the brake.
Operate the lever hoist as if lowering
a load.
Noises during hoisting and lowering
operation.
Wear or deformation of the load
chain and load sheave. Replace with new parts.
Operating handle becomes difficult
to operate during lifting or lowering
operation.
1. Over-hoisting or over-lowering.
2. Twist in the load chain causing it to
get caught between load sheave and
from the load chain.
Operate the hoist in opposite
direction.
Operate the hoist in opposite
direction and remove the twist load
chain guide.

Lever Hoists PAGE: 14
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
9.0 DIMENSIONS & SPECIFICATIONS
0.75T, 1.5T & 3T
6T
Model LH-015 LH-030 LH-060 LH-120
Capacity (tons) 3/4 1 1/2 3 6
No. of columns of load chain 1 1 1 2
Handle pull rated loads (lbs.) 60 66 75 83
Distance (in)
A 5.83 6.81 7.87 7.87
B 3.43 3.90 4.41 4.41
C 5.20 5.71 7.83 9.06
D 10.94 14.88 15.28 15.28
E 1.1 1.3 1.6 1.7
Ø 1.40 1.67 1.97 2.09
H 13.0 15.7 20.5 25.2
Net weight (lbs.)
for 5 ft lift
15.21 24.0 45.6 62.0
Packing measurement (in) 15 x 5 x 6.7 18.9 x 5.1 x 7.9 21.8 x 7.3 x 8.9 21.8 x 7.9 x 8.9
Extra weight per feet of extra lift
(lbs.)
0.53 0.94 1.48 2.96

Lever Hoists PAGE: 15
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
10.0: EXPLODED VIEW & PARTS LIST
10.1 Exploded View
6 Ton

Lever Hoists PAGE: 16
Model MLH
MLH-005 & MLH-010
www.ACIHoist.com|© 2021 ACI HOIST. All rights reserved | 1-866-4-A-HOIST
10.2 Parts List
Item # Part Name/Description
1 Top hook assembly
2
Safety latch kit
3
Top hook shaft
4
Bottom Hook Assembly
5 Chain pin & lock nut
7
Gear cover set
8
Reinforced plate
9
Load gear
10
Pinion shaft
11
Gear side plate
12
Chain stripper
13 Stay bolt
14
Pin
15
Load sheave assembly
16
Load sprocket
17
Load Gear
18
Chain guide
19
Lever side plate assembly
20
Pawl spring
21
Pawl
Item #
Part Name/Description
22
Snap ring
23 Brake seat
24
Ratchet disc
25
Friction disc
26
Twisting spring
27
Brake plate
28
Bushing
29
Stop knob
30 Brake cover
31
Socket head screw and spring
washer
32
33
Snap ring
34
Change over gear
35 Lever handle assembly
36
Snap ring
37
Handwheel
38
Snap ring
40
Rubber grip
41
Bolt and locking nut
48
Load chain
49 End chain ring