Alatas Service | Workshop Repairs |
Location | Singapore |
Crane Manufacturer | Liebherr |
Crane Model | HS885 |
Winch Manufacturer | Zollern |
Winch Model | Free Fall Winch |
A customer called on the Singapore Workshop for this Zollern free fall winch overhaul. Our Workshop was handed a Zollern free fall hoisting winch, together with hydraulic motor and new spare winch drum.
For the job, the customer required an inspection of the winch gearbox and overhaul it if necessary. We would then reassemble the whole unit with the new spare winch drum and complete the project hydraulic motor and function test.
Inspection before Zollern Free Fall winch overhaul
The dismantling of main hoisting winch gearbox and parts conducted with NDT testing as was the 1st and 2nd stage planetary gear carrier.
All planetary gears, gear raceways and pin assemblies were examined by NDT testing and no defects found.
The inner gear ring unit was examined and found to have no major damages and all bearing seating faces and operational gears had no defects discovered.
All planetary gear bearings were found in an acceptable condition so were can be cleaned and re-used.
The following units were also found in satisfactory condition:
Brake discs
Brake piston
Brake housing
Brake spring
Job Gallery for Zollern Winch Free Fall Overhaul
Inspection
Zollern free fall winch Variable Displacement Motor, A6VM200 supplied by customer to carryout function test on the winch once repaired New winch drum General Drawing of the winch
Dismantling of Zollern Free Fall Winch
Gearbox removed from the winch Brake unit removed from the winch unit Brake discs were found in satisfactory condition and can be cleaned and re-used Bolts to be replaced as standard
Reassembling of Zollern winch
Brake unit reassembly in progress Brake unit piston assembled with new seal kit Brake unit completely assembled and secured with new set of screws Gearbox installation in progress Installation of intermediate housing to the gearbox Gearbox mounting flange installed to the gearbox Drive unit completely assembled
Testing and transportation
Touch up paint on complete winch unit and secure it on a pallet ready fro delivery. Lifting Slings to be always placed on the winch drum during loading and unloading as stated in the attached signage