I TE C E (Continued) lUBRICATION (It is recommended that the slides be lubricated with molybdenum disulphide in petroleum jelly.) Being a dosed hydraulic system, the internal mechanism of the attachment requires no additional lubrication except for an oil nipple provided for lubrication of the stylus arm bearings and this together with periodic lubrication of the slides is an that is necessary. PLAY IN SIDEWAYS An the slides are provided with gibs. Adjustment should be effected as required and the set screws and locknuts carefully tightened. REPLACEMENT Of HYDRAUUC RAM lEATHER (Fig.
10) WiTHDRAW "A" "E" Instructions for replacing the hydraulic ram leather seal.i.1.g the piston rod in the cylinder are as foHows:- Remove cap screws 'A' and wi.thdraw hydraulic slide in direction of arrow. Release set screw 'B' and raise item 'C' dear of the cross slide - cylinder and valve unit should now be dear. \ Remove end cover 'D' an~ withdraw piston and rod from the cylinder. Remove piston. "C"l FIG. HI Replace ram leather 'E' - care being taken to ensure that the sealing lip is not damaged. On assembling end cover 'D' use sealing compound on face.
This hydraulic equipment has been made in the simplest and most foolproof form without unnecessary complications, and we believe that !..'lis is the most effective way of dealing with such apparatus. IT IS IMPORTANT TO SWITCH OFF THE HYDRAULIC UNIT WHEN NOT IN USE, so as to minimise temperature rise in t.l}e hydraulic tank. Heat is generated when the hydraulic fluid is by-passed through the relief valve to the tank and if the pump is left running unnecessarily without utilising the copying slides, viscosity of the oil can be reduced and can affect smooth operation. 26