Planeta EHW-60 User manual

INSTRUCTION MANUAL
AIR HOIST
EHW-60
EHW-60R
EHW-120
EHW-120R
02-04-04-0001-0516-00-BA-ENG-PLA

CONTENTS
1. Safety lnstructions ......................................................................................1
2.
Specification s ………………………………………………………………………………………… 5
3. Checks and lnstructionsbefore Installation
...................................................................... 5
3.1 Checks of the Product ........................................................................................................................................ 5
3.2 lnstructions on Warking Condition s… ....................................................................... 5
4. Installation …………………………………………………………………………….. 6
4.1 Installation ....................................................................................................... 6
4.2 Before AirConnection ………………………………………………………………… 6
5. Checksafter Installationand Test Run
........................................................................... 7
5.
1
Check of Hoisting Operation................................................................................. 7
5 .
2
Check of the PreventiveDevice against Reverse Winding (Overlowering Limit Switch) ... 7
5 .
3
Check of the LiftingHeight ................................................................................ 8
5 .
4
Load Test ·····································································································8
6. Checks before Operation - At the beginning of each shift …………………………………………….9
6. 1 Check before Start up ………………………………………………………………………..
9
6. 2 Check by ldling Operation .................................................................................................
9
6. 3 Check by Load Operation …………………………………………………………………………… . 9
7. Periodic lnspections ……………………………………………………………………………………………. 10
8. Maintenance and lnspection …………………………………………………………………… 11
8. 1 Lubrication……………………………………………………………………………………………….11
8. 2 lnspection ……………………………………………………………………………………………………….
12
8. 3 Storing the Hoist ………………………………………………………………………..16
8. 4
Troubleshooting …………………………………………………………………………….. 17
9. Brake
Adjustment……………………………………………………………………………………. 18
10. Disassembly and Reassembly ………………………………………………………………………….18
10. 1
Proceduresof Disassembly …………………………………………………………………. 19
10. 2 Reassembly ……………………………………………………………………..
20
11. Parts List ……………………………………………………………………………… 26
• Disassembly Drawing of EHW-60 and EHW-120 ······················································ 28
• Disassembly Drawing of EHW-60R and EHW-120R ................................................... 30

-1
1. Safety lnstructions
lf the hoist is not used correctly, a serious accident may occur, such as dropping the Ioad.
For correct use, carefully read this manual before installation, operation, maintenance or
inspection.
Have full knowledge of equipments, safety information and instructions before using the hoist.
* After reading, keep this manual where hoist users can access easily.
1. 1 General lnstructions
WARNING
• Never use the hoist for Iifting or lowering people.
Never Iift a Ioad near people nor carry a Ioad over people.
• Before installing, operating,maintaining or inspecting the hoist, carefully read and
understand all of the instructions in this manual in order to avoid accidents as a
consequence of incorrect handling.
• Keep this manual available for all of the people who will install, operate or maintain
the hoist.
• Always check the supporting member from which the hoist is suspended is strong
enough to support the weight of the hoist plus the weight of the rated Ioad, etc.
The customer has the responsibility for this.
1. 2 lnstructions for Safe Operation
lf there is any conflict between the instructions in this manual and safety rules of your company,
give priority to ones which are more strict than others.
1. 2.1 General Handling
WARNING
• Never operate the hoist unless the contents of this manual and caution plate (warning
Iabei) are completely known.
• Never operate the hoist nor sling a Ioad unless you were trained in safety rules andin
operating manner of the hoist. Never allow untrained persons to do so.
• Never remove or deface any name plates, caution plates or warning Iabeis which are
attached to the hoist.
• Always check the hoist before each shift, and inspect it periodically.
• Never operate the hoist if you are not physically fit to do so.
The operator must have good hearing, vision and depth perception.
• When any instruction signs put on the push button switches such as "EQUIPMENT
BEING INSPECTED" or "DO NOT RUN", never operate the hoist until the sign is
removed by the designated person.

-2-
1. 2.2 Installation
WARNING
• Always employ specialists or weil trained persons for installation.
• Never install the hoist in any environments which is out of specifications.
For example, the hoist should not be exposed to rain or water.
• Always install stoppers at the end of the rails for travelling or traversing.
• Always check the supporting member for the hoist has enough strength.
• Make the hoist able to swing freely by using the top hook or the fitting.
* Never fix the hoist.
CAUTION
Never operate the hoist when the hoist is placed on the floor.
* Never operate the hoist with the wire rope slackened. Only operate the hoist when
it is hanging.
1. 2. 3 Air Pressure
WARNING
Operate the hoist within a working air pressure range of 0.4""0.6 MP a {4"'-'6 kgf/cni,
60"'-'85psi} .
lf the air pressure is less than 0.4 MPa {4kgf/cni, 60psi}, the preventive device against
reverse winding (overlowering Iimit switch) will not work.
1. 2. 4 Operation and Handling
WARNING
• Never Iift a Ioad greater than the rated capacity of the hoist.
Therated Ioad is marked on the hoist body.
• Never stand on a suspended Ioad.
Never use the hoist for Iifting, lowering or transporting people.
• Always stand clear of the Ioad.
Never walk under a suspended Ioad, and keep out of its area of projection.
Never place hands, feet, etc., under or between suspended Ioads.
• Never operate the hoist when anyone is in the travelling area of the Ioad.
• Always check there are no objects in the way of the Ioad or the Ioad hook when moving
the hoist.
• Never carry a Ioad over people.
• Never leave a Ioad suspended for any extended period.
• Always pay attention to the Ioad at all times when operating the hoist.
• Never swing the Ioad or the Ioad hook when moving the hoist.
• Never use the preventive device against reverse winding (overlowering Iimit switch) as
a means of stopping the hoist. lt is for emergency stop only.
Always stop the hoist before the buffer spring collides with the hoist body.
lt is for emergency only.

-3
• Never pull a Ioad at an angle.
Never Iift a Ioad when the Ioad hook is not over the load's center of gravity.
* Always move the hoist over the load's center of gravity before Iifting.
• Never allow the wire rope to touch structures having a sharp edge.
• Never use the wire rope of the hoist as a sling.
• Never do earth Iifting (Iifting locked Ioads ) .
• Never turn over a suspended Ioad.
* Always employ special equipments in case of turn over work.
• Always check movement of the push button switches before operation.
Never operate the hoist if the push button switches do not move smoothly.
• Stop the hoist immediately when up I down operations are contrary to the indications
marked on the push button switches.
• Always check operation of the brake before using the hoist.
Never use the hoist if the brake dose not work weil.
• Never operate the hoist when damaged or abnormal sound I vibrationoccurs.
• Never operate the hoist with the wire rope in any of the following conditions:
CD Kinked, deformed or corroded.
® The number of broken wires or the reduction of diameter reaches the service Iimit.
• Never perform cutting work on a Ioad suspended by the hoist.
• Never perform electrowelding work on a Ioad suspended by the hoist.
• Never use the wire rope of the hoist as a ground for welding.
• Never attach a welding electrode to the wire rope of the hoist.
• Never Iift any single Ioad with 2 or more hoists.
• Never lock the push button switches.
*The hoist must be operated by the operator hirnself I herself at all times.
• When moving a Ioad with a plain trolley, never push the wire rope but push the Ioad
itself. Never pull the Ioad.
CAUTION
• Never use the hook with a damaged or malfunctioning hook latch.
• Always operate the hoist carefully during Iifting and lowering Operations.
Never start, stop or reverse the hoist suddenly.
• Never allow the suspended Ioad to touch the nearby structure or power lines, etc.
• Never jerk the hose of the push button switches nor catch it on the nearby structure.
• Never allow the hoist or trolley to collide with the 1-beam stopper or the structure.
• Always check the Ioad hook can swivel smoothly before operating the hoist.
• Always position the slings at the center of the Ioad hook.
• When starting to Iift, stop the hoist once as the wire rope becomes tensioned.
* Never jerk the hoist. Carefully take up the slackened wire rope.
• Always check the Ioad-Iifting height of the hoist is enough for required work.

-4
1. 2. 5 Maintenance, lnspection and Alterations
WARNING
• Never alter the hoist or its accessaries.
• Always use genuine parts for replacement.
• Always shut off the air supply before carrying out maintenance,inspection or repair.
• Always employ specialists or weil trained persons for maintenance,inspection and
repair.
• Always remove the Ioad from the hoist before maintenance, inspection or repair.
• Always disassemble the hoist on the floor.
• lf any problems are detected during maintenance or inspection, never use the hoist but
correct andrepair the problems immediately.
• Periodically, inspect the hoist thoroughly and replace any worn or damaged parts.
• Stretched, worn or damaged hooks should be discarded.
Never attempt to repair it, just replace it with a new hook.
e Always put up an instruction sign ( "EQUIPMENT BEING INSPECTED ", "DO NOT
OPENTHE VALVE", etc.) before carrying out maintenance,inspection or repair.
• Never do anything if you have any questions about the hoist, please do not hesitate to
contact your dealer or us.
CAUTION
• Follow the lubrication instructions.
• Never operate the hoist without lubricator and filter.
• Always hang the hoist when carrying out test run after maintenance or repair.
* Never operate the hoist with the wire rope slackened.

5-
2. Specifications
Model
Rated Ioad
kg
Lift
m
Airpressure
MPa lkgf/cm
2
f
Lifting
speed
m/min
Air
consumption
m
3
/min [normal]
Air
inlet
Mass
kg
EHW-60
60
1.9
0.4
l4f
18.5
0.55
R 3/8
9.2
0.5
l5f
22.5
0.7
0.6
l6f
26.0
0.88
EHW-60R
60
1.9
0.4
l4f
18.5
0.55
Re 3/8
9.5
0.5
l5f
22.5
0.7
0.6
l6f
26.0
0.88
EHW-120
120
1.9
0.4
l4f
11.0
0.59
R 3/8
9.4
0.5
l5f
13.5
0.75
0.6
l6f
16.0
0.93
EHW-120R
120
1.9
0.4
l4f
11.0
0.59
Re 3/8
9.7
0.5
l5f
13.5
0.75
0.6
l6f
16.0
0.93
Working conditions
Application area lndoor and normal atmospheric
conditions
Temperature range : -1 OO C to +500C
3. Checks and lnstructions before Installation
3 . 1 Checks of the Product
• Check the delivered hoist is what you ordered (check the name plate ) .
• Check there was no damage or deformation on the hoist during transportation.
• Check the pressure of the available air supply corresponds to the working air pressure of the
hoist.
3.2 lnstructions on Werking Conditions
WARNING
• Never use the hoist at a temperature below -100C or above +50°C,
CAUTION
• Do not install and leave the hoist outdoors.
lf it is necessary to use the hoist outdoors, always make a shelter with a roof for
housing the hoist.
• Under hostile environments such as high temperatures, high humidity, acidic, corrosive
and I or extremely dusty atmospheric conditions, the mechanical parts of the hoist may
be seriously damaged (for example, corroded).
Therefore, frequently check the hoist is maintained in normal conditions at all times.

-6
4. Installation
4.1 Installation
WARNING
Always check the supporting member from which the hoist is suspended is strong
enough to support the weight of the hoist plus the weight of the rated Ioad, etc.
The customer has the responsibility for this.
CAUTION
Only operate the hoist when it is hanging.
Never operate the hoist when the hoist is placed on the floor.
lf operated, irregular winding occurs, causing darnage to the wire rope.
Make certain the hoist is properly installed.
A little extra time and effort in doing so can contribute a Iot toward preventing accidents
and
helping you get the best service possible.
The supporting member for the hoist should have successfully passed an
inspection for the applicable safety standard.
• Check the top hook is correctly rigged onto the supporting member and the hook latch is
correctly closed.
• Never use a supporting memberthat suspends the hoist at an angle.
4.2 Before Air Connection
WARNING
The hoist is designed to operate within a working air pressure range of 0.4,......0.6 MPa
{4,......6kgf/cm, 60---BSpsi}.
• Always keep the working air pressure no greater than 0.6 MPa{6kgf/cm}.
lf necessary, use an air regulator for reducing air pressure.
• Always keep the working air pressure no less than 0.4 MPa{4kgf/cni}.
lf the air pressure is less than 0.4 MPa{4kgf/cni}, the preventive device against reverse
winding which consists of an air pilot valve will not work.
• Check sufficient air can be supplied to the operating area of the hoist.
Campare the air supply from the compressor to the air consumption of the
hoist.
(See Chapter 2 "Specifications" .)
Forapipe of excessively small diameter or of great length, the pressure drop can become
large enough to prevent the specified performance.

-7
• Use an air hose whose inside diameter is at least 9.5 mm (318 in. ) .
• Before connecting the air hose or pipe to the hoist, be sure to flush or blow out with air to prevent
the invasion of foreign matter (dust, etc.) into the air motor.
• Compressed air supplied to the hoist should be free from moisture or foreign matter.
lnstall an air filter to eliminate them from air supply.
• lnstall a lubricator to feed lubricant to the air motor.
See Chapter 8, Section 8. 1
"Lubrication". (Never operate the hoist without lubricant.)
• Connect the air filter, regulator and lubricator as close to the hoist as possible.
• When the air hose is connected to the hoist, pour about 10 drops of lubricant into the connecting
port of the hoist.
See Chapter 8, Section 8. 1 "(3) Recommended Lubricants".
•lnstall a dump valve (drain valve) at the lowest point in the piping.
5. Checks after Installation and Test Run
5.1 Check of Hoisting Operation
Always keep the working air pressure no less than 0.4 MPa l4kgflcm',
60psil.
At the initial operation, repeat up
I down operations several times at low speed, then go to the full-
speed
operation.
Adjust the speed by Controlling the pushing force on the push
buttons.
At this point, check the lubricator is feeding lubricant to the air motor.
See Chapter 8, Section 8. 1 "Lubrication".
Check the indications marked on the push buttons correctly show the actual directions of up I down
operations.
5.2 Check of the Preventive Device against Reverse Winding
(Overlowering Limit Switch) -See Fig. 1
Slowly operate the hoist in the lowering direction while
paying attention to the air from the air exhaust hole.
Check the preventive device against reverse winding
works at the lower Iimit. (Check the hoist stops when the
wire rope extends1.9m).
lf the hoist dose not stop within 100 mm after starting
air exhaust, stop operation immediately.
Air exhaust hole
Fig. 1

8-
5 . 3 Check of the Lifting Height
WARNING
The preventive device against reverse winding (overlowering Iimit switch) and the buffer
spring are for emergency only.
Never use them for usual operations.
lf the buffer spring is
frequently used, the wire rope will be damaged and the suspended
Ioad may drop, causing serious danger.
Check the preventive device against reverse winding dose not work and the buffer spring dose
not collide with the hoist body during required work.
lf do, change the mounting height of the hoist.
5. 4 Load
Test
• Lift the rated Ioad a few inches off the floor and check ability of the brake to stop and hold the
Ioad without excessive
dritt.
ln case of using the hoist with the trolley, traverse the trolley over the entire length of
1-beam
with the rated Ioad suspended a few inches off the floor.
Check the condition of 1-beam and the length of the air hose.
• Lift 125 % of the rated Ioad and check the operation.
This test should be performed for the safety check concerning the hoist, 1-beam,
etc.

-9
l{)
6. Checks before Operation- At the beginning of each shift
WARNING
• Always execute the following checks at the beginning of each shift.
• lf a malfunction occurs during the operation of the hoist, stop operation immediately
and take the necessary steps to rectify the problem.
Never operate the hoist if damaged or malfunctioning.
This is a serious hazard and could result in personal injury or death.
6.1 Check before Start
up
(1) Check the wire rope is not kinked,
deformed,
damaged, or worn.
See Chapter 8,Section 8. 2 "(2) lnspection of
Wire Rope and Service Limit ".
(2) Check the bottom hook is not stretched or
damaged
and the hook latch is in the normal position.
(3) For EHW-60R and EHW-120R, check the bottom
hook can swivel
smoothly.
Butter spring
Stopper
Locking portion of
the wire rope
E
E
c.o
>
e
<
0.
0.
<(
(4) Check the stopper is approx. 65 mm apart from the end
of the locking portion of the wire rope. (See Figure in right.)
WARNING
lf the buffer springcollides with the hoist body while the stopper is in contact with the
locking portion of the wire rope, the wire rope will be damaged and the suspended Ioad
may drop, causing serious danger.
(5) Check the trolley wheels track the rails properly and the wheels and rails are not
worn.
(6) Check the Iifting sling (suspension fastening) is not damaged or worn.
6.2 Check by ldling Operation
(1) Check the push button switches can be easily operated and the up I down operations are correct
as indicated.
Check hoisting speed can be changed from low to high speed by controlling the pushing force
on the push buttons.
(2) Check the preventive device against reverse winding functions correctly.
See Chapter 5, Section 5.2 "Check of the
Preventive Device against Reverse Winding
(Overlowering Limit Switch)".
(3) Check the hoist is not abnormally noisy or
vibrating.
6 . 3 Check by Load Operation
(1) Lift the rated or near the rated Ioad a few inches oft the floor and check ability of the brake
to
stop and hold the Ioad without excessive dritt.
(2) Check the hoist is not abnormally noisy or vibrating.

-10
7. Periodic lnspections
WARNING
• Always put up an instruction sign ( "EQUIPMENT BEING INSPECTED", "DO NOT
RUN", etc.) on the push button switches before carrying out inspections.
• Periodically, inspect the hoist thoroughly and replace any worn or damaged parts.
• Always shut off the air supply before carrying out inspections.
Exceptions are checks or inspections of the push button switches, brake, preventive
device against reverse winding, etc., during that the hoist should be operated.
• Preparinga special table for inspectionis recommended.
II Monthly lnspection
lnspect the hoist at least once a month. Gorreetand repair any problems which are detected.
• Required intervalfor inspectiondepends on the operating environment, operating frequency
and loading conditions of the hoist.
Therefore, make the inspectioninterval shorter according to your operatingcondition.
• For inspectionitems and methods,see Chapter 8,Section 8 . 2 "lnspection".
II Annual lnspection - Disassembly is required
Gompletely disassemble the hoist at least once a year for inspectionand maintenance.
Gorreet and repair any problems which are detected.
• Required interval for inspection depends on the operating environment, operating frequency
and loading conditions of the hoist.
Therefore, make the inspectionintervalshorter according to your operatingcondition.
• For inspectionitems and methods,see Chapter 8,Section 8. 2 "lnspection".
II Service Limit of Parts
lf any part is found to be worn beyond its service Iimit in the monthly, annual, or other
inspections, never reuse it.

-11
8. Maintenance and lnspection
WARNING
• Never alter the hoist or its accessaries.
• Always remove the Ioad from the hoist before maintenance,inspection or repair.
Exception is a inspection of brake, etc.
• Always put up an instruction sign ( "EQUIPMENT BEING INSPECTED", "DO NOT
OPEN THE VALVE", etc.) before carrying out maintenance, inspection or repair.
• Always shut off the air supply before carrying out maintenance, inspection, or repair.
Exceptions are checks or inspections of the push button switches, brake, preventive
device against reverse winding, etc., during that the hoist should be operated.
• Always employ specialists or weil trained persans for maintenance, inspection and
repair.
• Always disassemble the hoist on the floor.
• Always use genuine parts for replacement.
• Replace any parts damaged or wom beyond its service Iimit.
• Always excute the Ioad test after disassembling the hoist for maintenance or
inspection. See Section 8. 2 "(9) General Operation lnspection".
Always use the hoist correctly for safety and getting the best
service.
8.1
Lubrication
(1) Air
motor
• T o prevent the air motor from dry operation, continuously lubricate using a lubricator.
• Adjust the lubricator so that lubricant is fed at a rate of s s drops per 1 m
3
of air during
hoist operation.
• Periodically check the oillevel in the lubricator, and replenish if necessary.
Never allow the oillevel to go below the indicated line.
• Periodically remove drain water deposited in the air filter bowl.
WARNING
Always shut off the air supply before putting lubricant in the lubricator.
(2) Reduction Gear
Unit
• Periodically put grease into the grease nipple on the casing.
• Required quantity of grease is 5 10 cm
3
(5 10 ml) .
• Determine the lubrication interval according to the operating frequency.
• Lubricate in the no-load condition.
Operate the hoist with no Ioad several times after
lubricating.

-12
(3) Recommended Lubricants
The following table shows the recommended
lubricants.
Always use the same type or equivalents recommended by the oil
manufacturer.
Manufacturer
Airmotor
(Lubricator)
Reduction gear
cncl. bearing of)
reduction gear
Esso
Arox 22
Teresso 32
Beacom EP2
Mobil
Almo Oil No.525
Mobilux EP2
Shell
Tellus Oil C32
Torcula Oil 32
Alvania Grease EP2
• When disassembling, apply Iithium saponified molybdenum disulfide grease ( Molykote
BR2-S, and the like) corresponding to the No. 2 class of NLGI (National Lubrication Grease
Institute) to the 0-rings for dynamic seal.
8. 2 lnspection
(1) lnspection of Hook and Service Limit
WARNING
Never repair the hooks.
Always replace a stretched, worn or damaged hook with new one.
llllnspection on Hook Opening, Craks and Wear.
lf any of the following conditions apply to the inspected hook, never reuse, always
replace
with new one.
• The hook opening is visibly stretched, or the opening dimension is different from the
specified.
• The hook is deformed or cracked.
Carefully check for any bends or cracks on the hook
shank.
• Wear on the hook saddle, where the Iifting sling (suspension fastening) rests, reaches
the service Iimit.
• The hook latch is damaged or malfunctioning.

-13
I
Standard
dimension
Service
Iimit
A
26.0
-
B
19.0
16.9
c
27.5
-
D
18.0
15.9
I
Standard
dimension
Service
Iimit
E
3.18
2.95
Number of
all wires
Limit of broken wires
in one lay
10%
close each other and
in the same strand
5%
133(7X19)
13
7
- Hook Opening Dimension and Wear Limit
For the hook opening dimension A or C, measure the hook before use as a reference for later
inspections.
(2) lnspection of Wire Rope and Service Limit
Operate the hoist in the lowering direction until the preventive device against reverse
winding
(overlowering Iimit switch) works. Then inspect the wire
rope.
- Never use the wire rope having any one of the following defects.
• Kinked, deformed or corroded.
• The number of broken wires reaches the service Iimit.
• The reduction of diameterreaches the service Iimit.
- Wear Limit and Limit of Broken Wires.
The number of broken wires in one lay should be no greater than
1 0 % of all wires.
And the number of broken wires which are close each other and in the same strand should
be no greater than 5 %.
(mm)
- Replacement Parts
Always use a manufacturer's replacement wire
rope.
Using other wire ropes could cause damage to the preventive device against reverse
winding
(overlowering Iimit
switch ) .

13-
·
Standard
dimension
Service
Iimit
B
2.6
2.0
(3) lnspection of Brake and Service Limit
Disassemble the brake and inspect the lining and component parts.
For
disassembly, see Chapter 10, Section 10. 1 "Procedures of Disassembly".
• Does wear on the lining exceed the service Iimit ?
• Are Springs (50) decayed, cracked or flawed ?
• Are there any pressed marks or cracks at the engaged part between Brake wheel(32) and
Shaft (30)
?
•ls the air exhaust hole® on Brake cylinder (48) open ?
• Are there flaws, deformation or wear on 0-rings (49), (53) ?
Brake cylinder (48)
Brake wheel (32)
Brake cone
(51)
0-ring (53)
-
S
-
h
-
a
-
ft
-
(
-
3
-
0
-
)
----- -.
--------------- 0-ring (49)
Spring (50)
Lining
II Wea r Limit of Lining
(mm)
- Replacement Parts
• Always replace Springs (50) whenever Brake cone (51) is replaced.
• Replace all Springs (50) at the same time.
(4)
lnspection of Hook Holder
• ls there any deformation or cracks on the hook holder ?
• Are the bolts and set screws loose ?
- For EHW-60R and EHW-120R
• ls the bearing damaged or warn ?
That which does not rotate smoothly (feels
rugged when manually rotated) is beyond it
service Iimit.
• Are there any pressed marks, deformation, flaws, cracks or corrosion on the wire rope
anchor pin?

-15
Standard
dimension
Service
Iimit
A
3.2
3.4
a
3.0
2.7
b
30.0
29.7
c
18.5
17.5
(5) lnspection of Casing
• Are there any flaws, cracks, or deformation ?
Carefully check the part where the top hook is
attached.
• Are the bolts loose ?
(6)
lnspection of Switch and Valve
• Are there any flaws, deformation or wear on the 0-rings ?
• Are the springs decayed, cracked or flawed ?
• ls the hose damaged, or is the connection part loose ?
• Do the push buttans correctly return to the neutral position after being pushed ?
• Are the bolts loose ?
• ls the silencer in the handle clogged ?
• Check the pilot valve for the preventive device against reverse winding.
See Valve body(14) in the disassembly drawing (on Page 28 or 30).
Does the pilot valve return quickly when released after pressing the tip of the valve ?
(7)
lnspection of Air Motor
- Replace parts which show the following conditions :
• The vanes are warped (curved), seized or cracked.
Wear on the vanes reaches the service Iimit.
• The side face of the rotor is gouged or seized.
• The vane slot of the rotor is worn beyond the service Iimit or is narrower than the standard
dimension.
• The rotor is cracked, or the keyway is deformed.
• There is a visible indent or deformation on the key.
• The end plate is gouged or seized, or the surface is rough due to wear.
• Abnormal wear, flaw or corrosion is found on I in the cylinder.
• The bearings are damaged, worn, or do not rotate smoothly (feels rugged when manually
rotated ) .
11111 Wear Limit of Vane and Rotor
(mm)

-15-
(8) lnspection of Reduction Gear Unit
• Are there any shavings, burrs, marks, or deformation on the keyway or the brake wheel
engaging portion of the shaft ?
• ls any part deformed or cracked ?
• Are the bearings damaged or worn ?
Those which do not rotate smoothly
(feels rugged when manually rotated)
are beyond their service Iimit.
• The wear Iimit of the gear on the pitch circle
should be within 5 % of the original dimension
of tooth thickness.
Pitch circle
Bottom circle
Tooth thickness
Wear
(9) General Operation lnspection
After completing the inspections described in the foregoing sections, reassemble the
whole
unit according to Chapter 10, Section 10. 2 "Reassembly" and inspect as follows :
llldling
• Check the push button switches can be easily operated and up I down operation are correct
as indicated.
• Check hoisting speed can be changed from low to high speed by controlling the pushing
force on the push buttons.
• Check the preventive device against reverse winding functions correctly.
See Chapter 5, Section 5. 2 "Check of the Preventive Device against Reverse
Winding (Overlowering Limit Switch ) ".
• Check the hoist is not abnormally noisy or vibrating.
- Load Test
• Check for malfunctions while Iifting and lowering.
Operate the hoist at least twice through the full Iifting
range.
• Lift the rated Ioad a few inches off the floor and check ability of the brake to stop and hold
the Ioad without excessive dritt.
• Check there is no significant reduction in the hoist performance.
• Check the hoist is not abnormally noisy or vibrating.
8.3
Storing the' Ho ist
lf the hoist is to be stored for a long time, supply rust-proofing oil, for example, "Shell
Ensis
Fluids SDB", etc., through the air inlet port and run the hoist at low speed for several seconds.
Store the hoist in a dry location.

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Maltunetion
Main Causes
Solution
Motor does not run.
Slow rotation or no
rotation of Motor.
• lnsufficient air pressure.
• Supplied air volurne is insufficient.
• Inside diarneter of pipe is too srnall.
• Powder or dust in Motor.
• Vanes have been enlarged due to
rnoisture or long terrn storage.
• Vanes are burned due to the dry
operation.
• Vanes are worn or darnaged.
• 0-rings of rnain valve is darnaged.
• Brake does not release.
• Reduction gear :
lncorrect assernbly. Or gears, bearings,
etc., are worn or darnaged.
• lncrease air pressure.
• lncrease cornpressor output.
• Replace pipe with a larger inside diarneter.
• Clean Motor then Lubricate.
Clean air filter and replace filter elernent.
• Replace Vanes.
Discharge drain water frorn air filter.
Or clean air filter and replace filter
elernent.
• Clean Motor and polish Vanes.
Replace Vanes if required.
Supply oil to lubricator or clean lubricator.
• Replace Vanes.
• Replace 0-rings.
• Check the darnage etc. on 0-rings.
• Disassernble and check.
Replace the worn or darnaged parts.
Brake does not
work sufficiently.
• Lining is worn.
• Main valve does not return to the neutral
position.
• Replace with new Brake corn.
• Check the darnage on 0-rings and Springs,
etc.
Hoist does not run
in the lowering
direction.
• Preventive device against reverse
winding works incorrectly.
• Disassernble and check.
Hoist does not run
in the Iifting direction
after preventive
device against
reverse winding
works.
• lnsufficient air pressure.
• Preventive device against reverse
winding does not release.
• lncrease air pressure.
• Rernove the Ioad, then try Iifting.
lf Iifting cannot be done, disassernble and
check.
8. 4 Troubleshooting
WARNING
lf a malfunctionoccurs during the operation of the hoist, stop operation immediately and
take the
necessary steps to rectify the problem.
Never operate the hoist if damaged or malfunctioning.
This is a serious hazard and could result in personal injury or death.
CAUTION
Careless repairs can cause darnage to the hoist or personal injury.
Therefore, be careful but thorough when making repairs.
The following table shows probable causes and solutions of common
malfunctions.
lf any malfunctions not shown below happen, please contact your dealer or us.

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9.Brake Adjustment (See Fig. 2.)
CAUTION
Always shut off the air supply before carrying out brake adjustment.
The brake has been adjusted before shipping.
But the braking force will decrease because of wear
on
the lining during operation.
Therefore, the brake should be inspected and readjusted.
Make the readjustment in the following manner :
 Loosen the hex. nut.
Tighten the set screw i/6---2/6 turns clockwise.
And lock the set screw with the hex. nut.
Lift the rated Ioad and repeat up I down operation several
times.
Setscrew
Hex. nut
Fig. 2
Check ability of the brake to stop and hold the Ioad without excessive dritt.
NOTE : lf the set screw is over-tightened, the Iifting ability of the hoist will decline.
10. Disassembly and Reassembly
WARNING
• Always shut off the air supply before carrying out disassembly or reassembly.
• Always disassemble or reassemble the holst on the floor.
• Always employ specialists or weil trained persons for disassembly and reassembly.
CAUTION
• Careless work can cause darnage to the hoist or personal injury.
Therefore, take care during disassembly and reassembly.
• Before reassembly, thoroughly clean all disassembled parts and check for cracks,
flaws, deformation and wear.
• Never use acidic solvents for cleaning.
• Replace any damaged or excessively worn parts.
Also replace burred or damaged screws.