Esco YAK 66/33/17 Ton Jack User manual

Equipment Supply Company
Instruction Manual
YAK 66/33/17 Ton Jack
ESCO #92007
Copyright © 2020 Equipment Supply Co., All rights reserved
REV.7.20.A

FOREWORD ..................................................................................................................................................................................................... 3
SAFETY REGULATIONS ................................................................................................................................................................................ 3
PACKING ........................................................................................................................................................................................................... 4
PUTTING INTO OPERATION ....................................................................................................................................................................... 4
USE ...................................................................................................................................................................................................................... 5
WARRANTY ...................................................................................................................................................................................................... 6
MAINTENANCE JOBS FOR THE END USER ............................................................................................................................................ 6
AIR BLEEDING .................................................................................................................................................................................................. 6
MAINTENANCE RESERVED TO A PROFESSIONALLY QUALIFIED ENGINEER .............................................................................. 6
TECHNICAL DATA SHEET ............................................................................................................................................................................. 9
DRAWINGS ....................................................................................................................................................................................................... 10
REQUESTING SPARE PARTS ........................................................................................................................................................................ 11
2

FOREWORD
Dear Customer, before using the jack, carefully read these instructions and become acquainted with the safety symbols.
- This handbook is an integral part of the machine which must be kept safely and be handy for the worker to consult
whenever needed.
- The contents of this manual comply with Machine Directive 98/37 EEC and the jack is type approved in conformity with
the European Norm EN 1494 and following amendments.
- The manufacturing company reserves the right to make modifications without prior notice and without incurring any
sanctions whatsoever, without prejudice to the safety and main technical characteristics.
- Failure to observe the instructions may cause personal injury, which in some cases may be mortal.
- The manufacturer is not liable for any damage to things or injury to people caused by an erroneous or incorrect use of
its product. The identification plate is on the side of the casing. DWG. 1
SAFETY REGULATIONS
- Only authorised personnel are allowed to use the equipment and they must know the contents of this operating and
maintenance handbook.
-The jack is an apparatus for lifting only and not for supporting, it is therefore absoltely forbidden to work in
any way under the vehicle being lifted until it is placed on the relative stands. DWG. 2
- Before starting to lift a vehicle it has to be blocked with the parking brake and/or by putting wedges under the
wheels, as illustrated in figure DWG. 3
- If the vehicle is loaded check load stability when lifting.
- Place the jack so that the load is centred over it and where the gripping points are indicated by the vehicle
manufacturer. DWG. 4
- During lifting and lowering, it is necessary to check there are no persons or animals under the suspended load or in the
vicinity.
- Before lowering the load make certain the handle is in the horizontal position. DWG. 5
- Never lift loads on sloping, uneven or soft ground. DWG. 6
- If extensions are needed use only those supplied by the manufacturer with the jack.
Do not use extensions without the relevant plate. Never use more than two extensions. DWG. 7
- Do not lift the load in a confined space so as not to run the risk of getting trapped. DWG. 8
- It is forbidden to use more than one jack simultaneously on the same load.
- Never tamper with the pressure relief valve that has the guarantee seal. DWG. 9
3

PACKING
- The body, handle and other parts of the jack are packed in a three-layer corrugated cardboard box with pallet; the
operating and maintenance manual plus the warranty certificate in a folder are also inside the box.
- The instruction “Keep upright” is clearly visible on the cardboard box containing the jack.
- Depending on the number of jacks shipped, pallets of different sizes are used.
- Either transpallets or forklift-trucks are used for handling.
PUTTING INTO OPERATION
Assembly
1. Take the handle, the jack and the extensions out of the cardboard box.
2. Loosen the two nuts 1296 from inside the chassis. DWG. 10
3. Loosen screw 1289 from the chassis and remove parts 1295, 1277, 1083 and 0304 keeping them assembled.
4. Fit the handle (the air distributor must be facing the pistons) inserting the coupling in the groove, put the parts
removed previously into the hole of the handle, tighten screw 1289 and then tighten nut 1296.
5. Connect the two air pipes between the jack and the handle with the quick couplings on the chassis respecting the
colour indication as showed on the sticker on the chassis itself. DWG. 11
CONNECTION TO THE COMPRESSED AIR SYSTEM
-Compressed air enters into the jack circuit through the quick coupling on the top of the manual lifting/descending
controls; it is therefore necessary to have a connecting pipe with a quick coupling compatible with that of the jack. Check
that the air supply pipe has a useful passage of at least 6 mm and it is not pinched or restricted anywhere. DWG. 12
WORKING AIR PRESSURE: 116 - 145 PSI
-Absolutely never put the following into the compressed air circuit: hydraulic or Vaseline oil, brake liquid, kerosene or
other liquids.
4

-Install a filter dehumidifier-lubricator unit in the compressed air system.
- If you want to lubricate the compressed air circuit use exclusively:
AGIP OSO 100; MOBIL DTE 27; ESSO TERESSO 100;
SHELL TELLUS 100; BP ENERGOL HP 100
ACCESSORIES
The jack is supplied with two extensions or height adapters (120 mm the long extension, 70 mm the short extension), a
circular tooth plate (10 mm plate) and an extension holder.
NEVER USE MORE THAN TWO EXTENSIONS!
THE MANUFACTURER IS NOT LIABLE FOR ANY DAMAGE RESULTING AS A
CONSEQUENCE OF DISREGARD FOR THE ABOVE INDICATIONS AND THE WARRANTY
CONDITIONS ARE INVALIDATED THEREOF!
SCRAPPING AND DISPOSAL
- The lubricants must be disposed of in compliance with the anti-pollution laws in force.
- Scrapping the jack and its component parts must be carried out by the user in accordance with current laws.
USE
- Expressly observe the safety rules already described in this manual.
1) Position the jack under the supports as described in the manual of the vehicle
the manufacturing company is not responsible for any break or damage to the lifted vehicle or to persons or
property due to an incorrect use of the jack.
2. The handle positioning lever (A) is on the left in relation to the worker; by moving it upwards the stopping
system is released so the worker can then choose one of the three possible handle posi- tions. DWG. 13
3. When control (B) is in the perfectly central position, the jack is in the idle status.
4. By turning control B, located near the handle, towards the right in relation to the worker, the jack lifts the load.
5. By turning control B, located near the handle, towards the left in relation to the worker, the jack lowers the load.
DWG. 13
6. After lifting the load, it is absolutely essential to rest it on the support stands before doing any work under it.
REMEMBER THAT THE JACK IS A LIFTING DEVICE AND NOT A SUPPORTING
DEVICE!!!
- The operator’s employer will have to provide the necessary training and furnish the necessary information
about the pumping and shifting forces.
- If the distributor breaks during use, work directly on the flow of air, closing the safety cock no. 398, between the quick
coupling of the air inlet and the distributor itself. DWG. 14
-Before working with the jack, it is advisable to perform a few operations with no load in order
to acquire the sensitivity necessary to work safely with the jack.
5

Improper use
The air-hydraulic jack has been designed and made to lift transport vehicles. Any other use of the jack, such as for
instance lifting and/or moving persons, is considered to be definitely improper. All use of the jack not in conformity with
the safety rules listed in this manual is considered to be improper use.
WARRANTY
This jack is covered by a 12-month warranty starting from the date the warranty comes into effect or from the date the
jack leaves our factory if it has not already been rendered effective on-line; it covers all manufacturing defects but not
transport expenses, defects caused by improper use or damages suffered during transport. For more details please see
the card attached to this manual.
MAINTENANCE JOBS FOR THE END USER
- To ensure your jack a long life it is advisable to clean the pistons externally once a fortnight.
-Check the level of oil in the tank at least twice a year: this must be done with the pistons completely
lowered. The oil level must be up to the small bolt that is on the side of the cylinder/tank, you can check by loosening it.
If you have to top up the oil in the tank make certain the oil you are using is compatible with what is already inside the
tank so as not to compromise machine integrity. DWG. 15
- If the oil level is higher than it should be, even by only a little, or if the jack has been turned up- side down (as can easily
happen during transport), the oil is expelled through the suction pump as mist. This phenomenon disappears on Its own
when the oil level hase been restored. If the oil inside the tank exceeds the level by a lot, it is advisable to remove some
until it is back in the norm.
AIR BLEEDING
Each time the jack is serviced, removing and refitting parts connected to the tank and motorpump, it is advisable to bleed
off all air. Bleeding phases:
1. The pistons must be moved out completely.
2. Remove the casing and close the cock no. 0843.
3. Turn the jack over on to one side, leaving free access to the dowel no. 0541 on the side of the base. DWG. 16
4. Loosen (NEVER unscrew the dowel completely!) the dowel no. 0541 and move the pistons back in by hand.
5. Let all the air out from the dowel and continue until oil starts coming through and then close the dowel.
6. Put the jack back into the working position.
7. Open the cock no. 0843.
8. Move the pistons back in completely and check oil level.
9. Try to operate the jack without any load and if the piston lowers in jerks repeat the procedure at least 2 or 3 times.
MAINTENANCE RESERVED TO A PROFESSIONALLY QUALIFIED
ENGINEER
Having to carry out maintenance or overhauling, use exclusively genuine spare parts to ensure the utmost reliability for
the jack.
PROBLEMS
Solutions
6

THE MOTOR WILL NOT START, OR IT RUNS BADLY.
- Check that the air supply line is not choked. - The seals (1101) are worn, replace them! - The seals (1101) fitted
on the piston (1102) have difficulty in sliding: both the cylinder and the ram have to be dismantled and lubricated.
THE JACK DOES NOT LIFT THE LOAD.
- Check the oil level by means of the screw (1401). - There is dirt underneath the valves : remove the casing, close
the tap 843, turn the jack over so the cylinder is horizontal and the motor pump vertical, loosen the cap (518),
remove the bearings and springs and blow inside to thoroughly clean it. Next, reassemble and if necessary knock
the bearings again (40) and (521), repeat the bleeding operation illustrated on the previous page and put the jack
back into its normal position and reopen the tap. - Check the hydraulic block (1152), paying special attention that
the pistons (89) and (264), which control opening and closing of the descent valves, have not become rigid, in which
case dismantle them and grease them.
THE JACK LIFTS, BUT COMES DOWN UNDER THE LOAD.
- Dismantle the assembly (1152) and check that under the valves (40) and (83) there are no impurities, then, after
carefully cleaning, readapt the pin (83) in its seat with a light blow with a hammer. If it is not possible to obtain a
seal on the pin, replace the valve (KIT0265) complete with the pin (83). If the load still falls even after fitting the
jack, carry out the following step. - Completely drain the tank and the cylinder of oil, loosen the cylinder and check
the washer (210); if it is damaged, replace it. Refit everything and tighten the cylinder. Fill the oil tank with oil to the
required level; operate the jack a couple of times without the load; bleed and then top up the oil level when the
pistons are lowered.
THE RAMS FAIL TO GO BACK IN COMPLETELY EVEN WITH THE LEVER IN THE
DESCENT POSITION.
Check the suction-pump (935) and check that the piston (130) slides well: it is a good idea to grease or lubricate it;
unscrew and, if necessary, clean the silencer (267), then screw it back down.
OIL LEAKS
- If the jack expels oil from the silencer (1109), it means: the pumping element (1104) is scored or damaged and
must be replaced; the seal (1106) is worn and must be replaced. - Oil leaks from the suction pump (935): check for
the excess oil in tank. If the jack has been turned upside down or damaged the leak will soon stop; - If oil is leaking
from the silencer (267) and point B has failed to solve the problem, you must check the integrity of the hydraulic
block (1152): replace the seals (90) and (26). If the leak still persists, replace the whole unit (1152).
7

OTHER CASES.
- If the pistons lift up very slowly check that the tap 843 between the tank and motor pump is open. - If the jack is
malfunctioning when lifting or lowering, check the spring (1046), the rubber ball seal (429) and the smooth sliding
of the piston (130).
8

TECHNICAL DATA SHEET
9

Multi-language
DISEGNIZEICHNUNGENDRAWINGSDESSINSDIBUJOS
10

11

REQUESTING SPARE PARTS
WHEN ORDERING SPARE PARTS, THE FOLLOWING MUST BE SPECIFIED:
1) LIFT MODEL
2) SERIAL NUMBER
3) PART NUMBER
4) PART DESCRIPTION
5) QUANTITY DESIRED
12

CONTACT INFO:
www.esco.net - [email protected]
15270 Flight Path Drive
Brooksville, FL 34604
PH. 352.754.1117
Toll Free. 1.800.352.9852 (US, Canada Only)
Fax: [phone]
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