Furukawa Unic URW370C4U Series Manual

SERIES
SERIES
OMURW37C4U50C4U547C4U201510A
PRINTED IN JAPAN
OPERATION
&
MAINTENANCE
MANUAL
MINI-CRAWLER CRANE
HEAD OFFICE : Nihonbashi nishikawa Bldg, 5-3, Nihonbashi
1-chome, Chuo-ku, Tokyo 103-0027, Japan
MODEL

0-1
INTRODUCTION
Request to those who operate the crane
MODEL
SPEC.
CODE NO.
SERIAL NO.
CAPACITY
LBS
Crane model
Specification
Serial number
Code number
URW375C4U
URW376C4U
URW505C4U
URW506C4U
URW547C4U
TOKYO JAPAN
MADE IN JAPAN
The operator’s manual describes correct operation methods, simple inspection, and ser-
vice for the UNIC crane.
Be sure to read this manual carefully to carry out correct and safe operation of the crane.
Operate the crane after you have understood the contents of this manual.
Although we take all possible measures to ensure quality of the crane, you are requested
to contact our business offices, UNIC sales agents, or authorized service stations when-
ever you have anything you do not understand.
◆ For making inquiries
◆Name plate of the machine is located at the side of column.
◆When making inquiries, ordering spare parts, and requesting repairs, be sure to inform us
of the crane model, specification, serial number, and date of manufacture which are indi-
cated on the name plate.

0-2
TABLE OF CONTENTS
8. HOW TO REFER TO WORKING
RANGE CHART AND RATED LOAD
CHART
󱯎Working range chart ……………………… 8- 1
󱯐Rated load chart …………………………… 8- 2
9. DESCRIPTION OF EACH
CONTROL DEVICE
󱯎Overwinding alarm ………………………… 9- 1
󱯐Automatic stop for overwinding …………… 9- 2
󱯒Boom angle chart ………………………… 9- 4
󱯔Warning horn ……………………………… 9- 8
󱯖Retaining mechanism for slinging wire rope …9-8
󱯘Automatic stop for leaving minimum wire rope
(With wire rope retaining roller) …………… 9- 8
10. HOW TO OPERATE CARRIER
󱯎Designation of each control lever
and its location …… 10- 1
󱯐Preparation before operation ……………… 10- 3
󱯒Precautions before operation
(air-bleeding procedures) … 10- 6
󱯔How to operate …………………………… 10- 7
󱯖How to Crawl ……………………………… 10-10
󱯘How to fasten carrier when in transportation … 10-15
11. HOW TO OPERATE CRANE
󱯎Designation of each control lever
and its location … 11- 1
󱯐Preparation before operation ……………… 11- 3
󱯒Inspection before starting crane operation … 11- 4
󱯔Procedures to set up outriggers …………… 11- 6
󱯖How to operate boom for derricking
(raising and lowering) … 11-15
󱯘How to hoist and lower the hook …………… 11-16
󱯚How to telescope boom …………………… 11-18
󱯜How to slew boom ………………………… 11-20
󱯞How to store crane ………………………… 11-22
󱯠Procedures for storing hook………………… 11-23
󱯡How to store outriggers …………………… 11-25
SETUP OF THIS MANUAL
󱯎URW370C4 series ………………………… 0- 4
󱯐URW500C4 series ………………………… 0- 5
󱯒URW547C4 ……………………………… 0- 6
1. FOR SAFETY OPERATION
󱯎Request to customers ……………………… 1- 1
2. SAFETY PRECAUTIONS ON
CARRIER OPERATION
󱯎Before operation …………………………… 2- 1
󱯐During operation …………………………… 2- 2
󱯒When loading and unloading ……………… 2- 4
󱯔After operation …………………………… 2- 4
3. SAFETY PRECAUTIONS ON
CRANE OPERATION
󱯎Before operation …………………………… 3- 1
󱯐During operation …………………………… 3- 2
󱯒After operation …………………………… 3- 4
4. DESCRIPTION OF CARRIER
EQUIPMENT ……………………… 4
- 1
5. DESCRIPTION OF CRANE
EQUIPMENT ……………………… 5
- 1
6. NAME PLATES
󱯎Description of name plates ………………… 6- 1
󱯐Stickers in detail …………………………… 6- 2
7. DEFINITION OF TERMS
󱯎Outrigger extension………………………… 7- 1
󱯐How boom-sections are extended ………… 7- 6
󱯒Net rated load ……………………………… 7-10
󱯔Rated load ………………………………… 7-10
󱯖Lifting capacity …………………………… 7-10
󱯘Working radius …………………………… 7-10
󱯚Boom length ……………………………… 7-10
󱯜Boom angle………………………………… 7-10
󱯞Lift above ground ………………………… 7-10

0-3
TABLE OF CONTENTS
12. U-WAVE, Radio remote control
device, (Option)
󱯎Request to those who operate the crane …… 12- 1
󱯐Safety precautions ………………………… 12- 2
󱯒Designation of each equipment …………… 12- 5
󱯔Inspection before crane operation ………… 12- 8
󱯖How to switch crane operation mode ……… 12-10
󱯘How to operate the crane through
radio control operation … 12-12
󱯚How to replace batteries of transmitter …… 12-35
󱯜Daily checks, trouble inspection …………… 12-38
13. MAINTENANCE AND
INSPECTION OF CARRIER
󱯎Inspection before operation ………………… 13- 2
󱯐Inspection and Maintenance which is to be carried
out every 250 hours or 3 months …………… 13-13
󱯒Inspection and Maintenance which is to be carried
out every 500 hours or 6 months …………… 13-21
󱯔Inspection and Maintenance which is to be carried
out every 1000 hours or 12 months ………… 13-23
󱯖Non-regular maintenance ………………… 13-29
󱯘Storage …………………………………… 13-34
󱯚Fitting safety covers ……………………… 13-35
󱯜Maintenance and inspection of engine……… 13-35
14. MAINTENANCE AND
INSPECTION OF CRANE
󱯎Inspection before operation ………………… 14- 2
󱯐Cleaning …………………………………… 14- 3
󱯒Inspection of bolts mounting
slewing bearings…… 14- 3
󱯔Replacement of wire rope (for winding-up)… 14- 4
󱯖Replacement of expendable parts ………… 14- 8
15. WATER SUPPLY AND
LUBRICATION TO CARRIER
󱯎Precaution when carrying out filling
water and lubrication …… 15- 1
󱯐List of recommended lubricant …………… 15- 2
󱯒Filling water and lubrication chart ………… 15- 4
16. LUBRICATION TO CRANE
󱯎Precaution when carrying out lubrication…… 16- 1
󱯐List of recommended lubricant …………… 16- 2
󱯒Lubrication chart …………………………… 16- 3
󱯔Lubrication ………………………………… 16- 4
17. MAJOR SPECIFICATIONS
󱯎URW375C4U(5-section boom) …………… 17- 1
󱯐URW376C4U(6-section boom) …………… 17- 7
󱯒URW505C4U(5-section boom) …………… 17-14
󱯔URW506C4U(6-section boom) …………… 17-20
󱯖URW547C4U(7-section boom) …………… 17-26
󱯘Major specification
(Radio remote control device) for
URW370C4U, URW500C4U, URW547C4U
………………… 17-34
18. MODE INDICATOR LAMP
(CONTROL BOX)
󱯎Mode indicator lamp (Control box) ………… 18- 1
19. MEASURES TO BE TAKEN IN AN
EMERGENCY ……………………19
- 1

0-4
SETUP OF THIS MANUAL
URW370C4U
RS
URW370C4U
URW370C4U series
With radio remote controller
With cable remote controller
Manual specification
URW370C4U
R
SETUP OF THIS MANUAL
Crane covered in this manual have some difference in operation in accordance with the
specifications of with or without radio remote controller.
Difference in operation due to crane specifications is separately illustrated in this manual
for each specification.
Crane covered in this manual are roughly divided into three, the radio remote control
type, the cable remote control type and the manual control type.
1. Designation of specification
URW370C4 series of crane model is to be designated according to the number of sec-
tions of telescoping boom.
2. Designation of model
󱯎URW370C4 series
(Model) Number of boom section
URW375C4 5
URW376C4 6

0-5
URW500C4 series of crane model is to be designated according to the number of sec-
tions of telescoping boom.
2. Designation of model
(Model) Number of boom section
URW505C4 5
URW506C4 6
URW506C4U
RS
URW506C4U
Standard type
URW500C4U series
With radio remote controller
With cable remote controller
Manual specification
URW506C4U
R
URW505C4U
RS
URW505C4U
Short type
With radio remote controller
With cable remote controller
Manual specification
URW505C4U
R
Crane covered in this manual are roughly divided into two: short outrigger type and stan-
dard outrigger type.
1. Designation of specification
󱯐URW500C4 series

0-6
URW547C4U
RS
URW547C4U
URW547C4U series
With radio remote controller
With cable remote controller
Manual specification
URW547C4U
R
Crane covered in this manual are roughly divided into three, the radio remote control
type, the cable remote control type and the manual control type.
1. Designation of specification
󱯒URW547C4

MEMO

1-1
1. FOR SAFETY OPERATION
󱯎Request to customers
• Read preventive measures
against danger and cautions
stated in this manual for prop-
er understanding.
• Most accidents related to the
crane occur due to operation,
maintenance, and inspection
which have failed in observing
basic safety regulations.
… Failure to observe this may invite an accident resulting in injury or death.
CAUTION … Failure to observe this may cause damage to the crane.
◆Store this operator's manual where it is easily accessible to read it over and over again.
◆Failure to observe the right operation and maintenance/inspection illustrated in
this manual may cause trouble in the crane and may invite an accident, and this
will not only shorten its service life but will impair safety in the crane operation.
Please remember, in such cases, that no warranty will be given even if the crane is within
valid warranty period.
◆In order to prevent injury or death to crane operators and to those who stand close to crane
operating area due to operational mistake, caution plates are stuck on the crane.
You are requested to read them carefully.
◆Do not alter the crane.
• If you want to make an alteration, contact with UNIC sales agent or an authorized service
shop.
• UNIC does not bear any responsibility for troubles and /or accidents due to unauthorized
alteration.
Observeallthesafetyregulations!
◆Never failed to observe and CAUTION described in the manual as
they are of great importance in safety and the crane operation.

2-1
2. SAFETY PRECAUTIONS ON CARRIER OPERATION
󱯎Before operation
Observe the cautions for securing safety.
Failure to observe the cautions may cause trouble or serious accident.
2 Be sure to make inspection before oper- ation and periodical voluntary inspec-
tion.
If found something wrong, repair it immedi-
ately.
3 The crane is prohibited to crawl on a public road by the road traffic law.
1 Dress neatly and wear protectors such as helmet, safety shoes, and gloves without
fail.
Do not wear baggy clothes and accessories
which can be caught by control levers and fit-
tings, and oil-stained working clothes which
may catch fire.
WARNING
4 Check that no safety covers have been left removed.
It is very dangerous to start the engine,
to operate the crane with the safety cover
removed as the driving mechanism is
exposed.
5 Be sure to stop the engine before refuel-
ing or supplying and changing lubricant.
A fire source such as smoking cigarette in
mouth is strictly prohibited.
Failure to observe this may cause a fire.
6 When starting the engine in a small lim- ited area or indoors, open the windows
and doors for well ventilation.
Poor ventilation may invite an exhaust gas
poisoning.
7 Shift the interlock for crane-crawl lever to “Crawl” when crawling the crane.
Crane will not work by controlling crane
operation levers with the interlock for crane-
crawl lever shifted to “Crawl”.
Pedal
Crawling
Interlock for crane-crawl
operation
Crawling lever

2-2
SAFETY PRECAUTIONS ON CARRIER OPERATION
2 When crawling the crane, be sure to put outriggers in a condition of being stored
and store the hook.
1 The machine employs particularly small truck to facilitate working in a restrict-
ed space.
Since high performance crane is mounted on
the small truck, it has been built with a higher
center of gravity.
Take special care not to overturn the crane
when crawling on a unleveled ground.
󱯐During operation
3 Do not run the crane with a cargo hoist- ed or without the crane being stored.
4 Special care must be taken to run the crane slowly when making a quick turn
and crawling on a rough road.
5 When running over a bump, be sure to slow down the crane and direct it
straight to the bump to avoid unnecessary
shock to the crane body.
7 Be sure to use a foot-board to run over a ramp of more than 0.5ft(15cm).
8 Crawl the crane with low (1st) speed gear on a slope.
9 Be sure to use a pallet against the rub- ber crawler when parking the crane on
a slope.
10 Do not make an abrupt stop and start, and change a course on a slope.
11 When crawling up and down a slope, operate the crane by standing
at a higher position than the crane body.
12 Do not operate the carrier on the more steep slope than shows below,
as there is a risk of roll-over.
Less than 20°
Less
than
23°
Less than 10 °
on the unstable road
Less than
10°
Less than
0.6ft
(170 mm)
Move forwards and backwards
(straight)
When driving over a gap of the step, there is a risk of tipping
over caused by vibration or a shock. Therefore, make sure
the gradient of carrier is less than 10°, or the gap of the step
is less than 0.6ft (170 mm). The driving speed should be
“Very Low Speed” and sudden turning is strictly prohibited.
Left/Right gradients
Drive over a gap of the
step with either left or
right side of the carrier
・
6 When driven over an irregular road sur- face or going up and down the slopes,
the carrier must get over the slope straight and
try not to give any shocks to it.

2-3
SAFETY PRECAUTIONS ON CARRIER OPERATION
13 Do not run the crane over bumpy area, lying rocks with sharp edges,
rough solid rock, small broken stones, edges
of steel plate, steel bars for reinforcement,
scrap metals, and waste materials and on a
road such as in riverside where covered with
many stones which may remarkably shorten
service life of rubber crawler.
14 Do not take an article or an animal in the crane.
It may invite critical situation due to abrupt
swing or shift of center of gravity.
15 Do not park the crane over a place where withered grass or straw are
being spread.
It may cause a fire by heat of exhaust pipe or
exhaust gas.
16 Do not use the hook holder mount- ed in the rear side of the crane
body as a means of pulling a vehicle.
This may break the holder.
Hook holder
17 To avoid rubber crawler damage.
()
()
()
Be sure to drive both sides
of crawler in the same
direction for making a turn.
Do not drive both sides of
crawler in the opposite
direction each other.
Do not drive only one
side of the crawler.
For the white (or gray) crawler, observe the
driving strictly in terms of its characteristics.

2-4
SAFETY PRECAUTIONS ON CARRIER OPERATION
1 Return the crawling lever and run the engine at a low speed.
󱯔After operation
2 Shift the crawling lever to “Crane” posi- tion.
3 Stop the engine and remove dirt and dust stuck on the crane body.
Since dust stuck on the battery, electric wir-
ing, and engine related components such as
muffler may cause a fire in particular, be sure
to remove it.
4 Cover the crane or store it in a storage house to prevent it from being accessed
by unrelated persons such as children.
Cover the crane after heated sections have
been cooled off.
Putting a cover on while the crane body is
still hot may cause a fire.
5 Remove the starter switch key to store.
Failure to disconnect it may cause a fire as
cables short-circuited by gnawing animals
such as rat.
6 Disconnect a battery cable before the crane is to be stored for a long period of
time.
Cable (-) Disconnect
󱯒When loading and
unloading
1 When loading and unloading the crane, use a non-slip foot-board with a enough
capacity of strength, width, and length and
run the crane straight up and down at a very
low speed.
Changing direction of the crane on the foot-
board may cause the crane to fall off.
2 Stop the engine, apply parking brake, and put drags to wheels to secure the
mounting vehicle when loading and unload-
ing the crane.
Failure to observe this may cause the crane
to fall off because the vehicle shift while it is
being loaded and unloaded.
Work by following the instructions illustrated
in the sticker, “Loading and unloading proce-
dures”. (Refer to page 6-6.)

3-1
3. SAFETY PRECAUTIONS ON CRANE OPERATION
󱯎Before operation
• When the crane is to be operated close
to the power transmission or distribution
line, contact in advance with a local power
company to make arrangements concern-
ing safety for starting the crane operation.
• If crane operation close to the power trans-
mission or distribution line is unavoidable,
be sure to secure safety distance from the
power lines.
List of target safety distance
Power transmission line
Voltage Safety distance (target)
500,000 volts 36ft(11.0m) or more
275,000 volts 23ft(7.0m) or more
187,000 volts 20ft(6.0m) or more
154,000 volts 17ft(5.0m) or more
66,000 volts 14ft(4.0m) or more
22,000 volts 10ft(3.0m) or more
Power distribution line
Voltage Safety distance (target)
6,600 volts 7ft(2.0m) or more
2 Shift the interlock for crane-crawl lever to “Crane”.
1 Be sure to make inspection before oper- ation and periodical inspection for sling-
ing implements.
If a defective slinging implement is used, fall
of lifted cargo may result.
3 Turn ON the overwinding alarm switch.
4 Make sure that each safety device is always functioning properly.
Be sure to turn ON the overwinding alarm
switch before starting crane operation.
• The crane is not electrically insulated.
• When the crane is operated near the power
transmission line or the power distribution
line, there may be a risk of electric shock
due to electric discharge even if a part of
the crane such as boom will not make a
direct contact with the power lines.
5 Keep a safety distance away from the high-voltage power line to avoid an
electric shock.
6 Do not operate the crane when wind velocity exceeds 22mph(10m/sec). and/
or while thundering.
Crane operation while strong wind is blowing
can cause fall of a lifted cargo or overturn of
the crane as the boom and/or a lifted cargo
are hit by a gust of wind.
7 Pay attention that anyone except per- sons concerned will not enter within a
working radius of the crane.
Take good care to carry out safety operation
by keeping a close watch around the working
area.
Pedal Interlock for crane-crawl
operation
Crawling lever
Crane

3-2
SAFETY PRECAUTIONS ON CRANE OPERATION
10 Operation with the crane kept leaning makes it unstable when a
cargo is lifted up.
Such operation can cause the crane to be
overturned.
8 Make sure that the ground on which outriggers are to be set up is solid and
firm.
When setting up the outriggers on an
unleveled ground or on a slope, be sure to
place a support (such as plank, steel plate
etc.) under the outrigger foot flanges to keep
the crane level.
In addition, when the crane is to be operated
on a soft ground, take the same measures to
prevent the outrigger foot flanges from sink-
ing into the ground when a cargo is lifted up.
9 Lift up the crawler by approx. 2in. (50mm)from the ground.
11 In normal crane operation, be sure to set up the crane level with the
outriggers fully extended.
12 Do not stand under or in front of the hook when unhooking as it swings.
13 Do not try adjusting hydraulic equipment.
󱯐During operation
1 Pay attention that the hook will not be overwound.
Be sure to turn ON the “overwinding alarm
switch”.
• Remember that the hook is wound up
when boom is extending.
• If the hook hits against the boom top due
to overwinding of the hook, it may cause
damage to wire rope and the sheaves at the
boom top and may cause the fall of lifted
cargo.
2 Operate each lever slowly and smooth- ly.
An abrupt lever operation with a cargo lifted
gives an excessive shock to the crane which
may cause damage or overturn to the crane.
3 Slew the crane at low speed.
Swing of a lifted cargo increases working
radius of the crane which may cause it to be
overloaded.
4 If the engine speed is too slow when operating the crane, press the accelera-
tor to increase it.
Crane operation with the engine (and pump)
running at low speed may cause a cargo
hoisted up to swing due to pulsation of
the engine.
This is not a malfunction but impairs smooth
control of the crane.
5 Overloaded operation is strictly prohib- ited.
Crane operation with a load exceeding the
rated load hoisted may cause damage or over-
turn to the crane.
DANGER
BEFORE OPERATING THE CRANE
IT IS MANDATORY TO
OUTRIGGERS
SET UP ALL THE

3-3
SAFETY PRECAUTIONS ON CRANE OPERATION
6 Pulling a cargo sideways, straight, or obliquely is strictly prohibited.
These operation may cause slewing mem-
bers, booms, columns, and derrick cylinder to
be damaged.
7 When a cargo to be lifted is detached from the ground, stop lifting it up tem-
porarily to confirm safety.
• When a cargo to be lifted is detached from
the ground, stop lifting it up temporarily
to make sure that the cargo is kept hori-
zontally, the crane maintains its stability,
and the rope slinging up the cargo is posi-
tioned properly.
Then lift it up again after making sure of
the safety.
• For lowering a cargo, stop lowering it
immediately before it touches the ground
then lower it again gradually.
8 Do not leave from operating position with a cargo hoisted.
Lower a hoisted cargo onto the ground before
leaving from the operation site.
10 Do not stay under a hoisted cargo.
9 Do not get up on a cargo being hoisted.
This may cause a fall from the cargo being
hoisted.
11 Pay attention that wire ropes will not be paid out unnecessarily to
prevent ropes from being wound around the
drum irregularly.
• Operation such as paying out wire ropes
further with a cargo placed on the ground,
retraction and/or lowering boom loosen
the ropes to cause them irregular winding
which results in remarkable shortening
service life of the ropes.
• Wind the first layer of rope firmly and
regularly around the drum.
• Correct kinks of rope immediately with a
mallet.
12 Pay extra attention to underground crane work in which the hook must
be lowered further than the work on the
ground.
When paying out wire ropes, be sure that
more than 3 turns of rope must always be left
on the drum.
• Oil temperature is apt to rise easily if
repeated operation of winding up and
down the hook, especially in a high lift, is
required.
• Excessive high temperature of hydraulic
oil damages high-pressure hoses and gas-
kets being employed to cause the oil to
spout out so that a scald may result.
13 Stop crane operation when tem- perature of hydraulic oil exceeds
176°F(80°C).

3-4
SAFETY PRECAUTIONS ON CRANE OPERATION
󱯒After operation
1 Make sure that the booms, the outrig- gers, and the hook have been stored
before crawling the crane.
Temperature of both hydraulic and gear
oil is high immediately after crane opera-
tion so that accumulated high pres-
sure still remains.
Removing filling cap, draining oil, or replac-
ing oil filter while temperature is still high
allows hydraulic and/or gear oil to spout out
and a scald may result.
2 Do not carry out maintenance and inspection while temperature of either
hydraulic oil or gear oil is still high.
3 Since temperature on the engine and the hood in the side is too high immediately
after crane work, touch them after they have
been cooled down.

4-1
4. DESCRIPTION OF CARRIER EQUIPMENT
17
19
8
10
6
14 7
9
521 4 3
14
18
17
11
12 16
20
13
URW505C4U

4-2
17
19
8
10
6
14 7
9
521 4 3
14
18
17
11
12 16
20
13
URW375C4U / URW376C4U / URW506C4U / URW547C4U
DESCRIPTION OF CARRIER EQUIPMENT