h16tp(x - AJ Maskin AS

Sheet C042CORRECTIVE MAINTENANCE SHEETCHANGING THE HYDRAULIC PUMPFolio 1/2Caution!Ensure that the oil is not toohot.Caution!Use a container to collect oilto prevent pollution of theenvironment.8 - Preliminary operations• Put the machine in the maintenance configuration (see corresponding paragraph).• Switch off electric power (see corresponding paragraph).• Close the shut-off valve, if any. Otherwise, empty the hydraulic tank.2 - Removing the hydraulic pump• Mark and disconnect the pump hoses (1).NB:Unscrew the hoses slowly to release residual hydraulic pressure.Caution!It is essential to put thecomponent in slings beforedismantling/re-assemblingit.• Put caps on the hoses.• Remove the pump’s fixing screws and washers (2) on the motor flange (3),and remove the pump (5).• Remove the spined split hub (6) by unscrewing the tightening screw (7).• Remove the hydraulic unions (4) screwed on the pump (see figure on page 2/2)• Discard the O-rings.3 - Installing the hydraulic pump• Fit new O-rings to the unions.• Screw the hydraulic unions to the pump.• Lubricate, then install the spined split hub on a new pump.• Ensure that the spined hub is against the pump shaft shoulder.• Coat the hub tightening screw with normal blue loctite 243 then tighten to atorque of 83 N.m (61 lb.ft).• Install the pump on the flange and fix using fixing screws, previously coatedwith normal blue loctite 243 bleu and fitted with new grower washers. Tightento a torque of 86 N.m.• Reconnect the hydraulic hoses according to the marks made during dismantling.• Open the shut-off valve, if any.• Check the level of the hydraulic tank and top up if necessary.• Before re-starting, fill the pump pan with hydraulic oil (hole L).4 - Additional operations• Put the machine back into the operational configuration.• Make several extension cycles to purge the hydraulic circuit.• Check the level in the hydraulic oil tank• Adjust pump output, the load sensing pressure limiter and the main pressurelimiter (see corresponding sheet).