J. D. NEUHAUS Profi 025Ti Operation Manual

Contents

J. D. NEUHAUS Profi 025Ti Operation Manual Manual pdf 49 page image

The motor and brake functions are achieved in part bymeans of shared components. The braking action isapplied at the lateral surfaces of the rotor. The rotor ispressed via spring force from the cover-side of themotor against a second braking surface located on theopposite side by means of a piston on which brakingmaterial is bonded.R E M OVA LThe hoist must first be unloaded and disconnected fromthe main air supply.Note: The following operations can be performed fromthe nameplate side after the motor has been removed. Checking vane wear, replacing the vaneswith starting aids if necessary. Checking brake wear, replacing the brake pistonif necessary. Renewing the motor lubrication.The replacement of the centre section halves with brakelining is described under a separate item. Unscrew the nameplate 1. Remove the motor cover bolts 2 and pull out themotor cover 3 (when the cover bolts are removed,tension of the brake springs 4 is fully released). Remove the brake springs. Remove the brake piston 5 from the internal cylinderintegrated in the motor housing. Pull out the rotor 6, removing the vanes 7 andstarting aids 8.Checking vane wear:(See illus. Checking vane wear, page 50).Worn vanes reduce the motorpower and consequently the lifting performance.Replacing thevanes together with the starting aids.Checking braking surfaces of the brake piston andthe centre section half with brake lining for wear anddamage:The circular wear pattern in the braking surfaces mustnot be deeper than 0.2 mm (see also illustrationpage 50). The extremely low-wear braking material willnot reach the wear limit of 0.2 mm within the design-dependent service life of the hoist, under intended use.Should the wear limit be reached prematurely, the actualpressure must be checked with the device switched on(the brake drags in the event of insufficient pressure).M O T O R I N S TA L L AT I O N /C H E C K I N G B R A K E L I N I N G S A N DVA N E S / M O T O R L U B R I C AT I O Npowered by air!MAINTENANCEPage 49Replacing brake discs, brake piston and vanes /Motor installation14/15813 1112 7 6 10 9 5 4 3 2 1