VARISCO M Series Instructions For Use And Maintenance Manual

VARISCO M Series Instructions For Use And Maintenance Manual Manual pdf 24 page image

Varisco S.p.A.Z.I. Nord - Terza Strada, 9 - 35129 PADOVA – ITALYTel.+39.049.8294111 Email: export@variscospa.comFax+39.049.8076762 Web: www.variscospa.com249.4.2 MECHANIC SEAL REPLACEMENT9.4.2.1 SMALL-SIZED PUMPS (MOD. 010 – 015 – 020 – 022)DISASSEMBLY1. Remove stator and pump body following the steps outlined in Chap. 9.3.1 (p. 1 and 2)2. Loosen the fixing grub screw (06) and remove the pump motor by extracting it in thedirection of the black arrow.3. Move the sleeve (07) in the direction of the black arrow.4. Unscrew the grub screw from the bush (08) in order to be able to move it along the shaft inthe direction of the black arrow.5. Extract the long pin (09) and detach the propeller shaft by moving the whole in the directionof the black arrow.6. Extract the hollow shaft (10) from the pump in the opposite direction of the black arrow,holding the seal face (11) to prevent it from damage upon the disjunction of the seal fromthe hollow shaft.7. Remove the stationary seat (12) using a screwdriver.RE-ASSEMBLY1. Check the condition of O’Rings, seal and stationary seat faces.2. Check the condition of the hollow shaft.3. Clean the hollow shaft, the housing (13) (see picture above) and all involved parts.4. Clean and oil the propeller shaft (Rust jams the shafts coupling, thus increasing the dangerof damage during disassembly).5. Wet with glycerine the hollow shaft (10) and the bush (08) on the involved area to ease theinsertion of the mechanic seal.6. Carefully clean the seal faces before assembly.7. Perform the steps backwards described in Chap. 9.5.2.1.1.WARNING: During re-assembly, it is necessary to distribute the pressure uniformly on the fixedring, to prevent malfunctioning or failures.9.4.2.2 MEDIUM AND LARGE SIZED PUMPSDOUBLE MECHANIC SEAL9.4.2.2.1.1 DISASSEMBLY1. Disconnect the flow pipes at the indicated points (01) (see picture A).2. Remove stator and pump body following the procedure in Chap. 9.3.1 (points 1 and 2).

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