To prevent unnecessary wear, it is important to maintain the hooklift continuously. Provided below is information regarding daily maintenance and servicing.
Daily Maintenance
Daily care, which only takes a few minutes, can prolong the service life of your hooklift.
Provided below are some daily steps to help maintain the hooklift.
- Check the oil level.
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Make sure that there are no trapped pipes or hoses. And that they are free from damage or leaks. -
Make sure that there are no fallen objects in between the hooklift’s different parts. - Check that the hooklift is free from deformation and cracks.
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Verify that all lighting and other electrical equipment functions correctly. -
Finish by inspecting the hydraulic pump.
If any damage is found, contact your JOAB workshop immediately.
Washing the hooklift
Newly lacquered surfaces must be cleaned using detergent and a sponge only. Do not use a high pressure washer. A high pressure washer should only be used after at least three weeks following treatment of surfaces.
Detergents contain acids. Make sure that the cleaning fluid used to clean surfaces contains less than 9pH. The maximum temperature of the cleaning fluid must not exceed 50 °C above the ambient temperature. After washing, make sure to rinse all surfaces thoroughly.
Cleaning the hooklift with a high pressure washer entails risks. All electrical components, even enclosed, are sensitive to water under high pressure.
When using a high pressure washer, make sure to hold the nozzle at least 45 cm from all lacquered surfaces. Use a standard nozzle only, do not use a turbo nozzle.
Always apply fresh grease around lubrication points after washing. For more information regarding the hooklift's lubrication points, refer to below.
Lubrication Points
The following image highlights the locations on the hooklift that shall be kept lubricated.
- Tip-cylinder (x 4)
- Auxiliary-lift-arm (x 4)
- Auxillary-lift-cylinder (x 4)
- Centre-lock (x 2)
- Extending-section cylinder (x 2)
- Shunting-pivot (x2)
- Rollers (x 2)
- Tip-pivot (x 2)
- Hydraulic-lock-cylinder (x 2)
hooklift L
- Hook-post-cylinder (X 2)
- Hook-post axle (X 2)
hooklift LA (optional)
Maintenance of the lubrication points on the hooklift should normally follow the vehicle's maintenance scheme for lubrication. However, the hooklift's lubrication points must be maintained after every 75 hours of operation.
If the vehicle is equipped with a central lubrication system, it is important to ensure that it functions correctly after every 75 hours. And in addition, any lubrication points that are not included in the central system are maintained.
Use grease type: NLGI 0 or thicker when a central greasing system is employed. Bearings with a high load, such as those in the rollers, must use a higher grease viscosity than normal.
Do not apply grease or oil onto the guide rails.
Service of the hooklift
During normal operation, it is recommended that the oil is changed as follows:
- Mineral oil – once every two years
- Green oil – once every year
JOAB recommends that the oil is changed during the autumn period.
If green oil is used for the system, always use the same type of oil and manufacturer of the oil.
The oil-filter must be changed after the first fifty hours of operation, then every year after that.
The air-filter should be replaced at least once every two years, or more often, as required.
Service-Reminder Sticker
A JOAB service sticker is placed on the inside of the drivers door to indicate when the hooklift is due for its next service. In the example shown opposite, the numbers around the outside represent the months January to December.
As the month numbered 1 (January) is missing from the sticker, this indicates that the next service is due during the month of January. Make sure that the hooklift is serviced in accordance with the sticker.
Torquing of Fasteners
All fasteners on the hooklift shall be re-torqued after 5000 km of operation. Vertical pendulum-bolts shall be re-torqued to 40 Nm. All other bolts shall be torqued as stated below.
| Threads | Torque 8.8 | Torque 10,9 |
|---|---|---|
| M8 | 24 Nm | 33 Nm |
| M10 | 47 Nm | 65 Nm |
| M12 | 81 Nm | 114 Nm |
| M14 | 128 Nm | 181 Nm |
| M16 | 197 Nm | 277 Nm |
| M18 | 275 Nm | 386 Nm |
| M20 | 385 Nm | 541 Nm |
| M24 | 518 Nm | 935 Nm |
Working on the hooklift
Before working on a raised hooklift the body must be removed from the hooklift. And the tip-supports must be in place to support the hooklift. Failure to do so, can lead to serious injury or death.
The hooklift is equipped with two tip-supports, as shown and described below.
These are used when working on the hooklift. They support the hooklift when it is raised and act as a safety measure in the event there is a hydraulic failure.
Shown opposite is the location for storing the tip-supports (shown in red) and the correct placement of them when used to support the hooklift.
The tip-supports are anchored onto the hooklift using two red anchor points, as shown opposite. Locate these on the hooklift and place the tip-support between them, as shown above, before working on a hooklift.