SEAT Workshop Service and Repair Manuals

Pressing sealing flange with sender wheel onto crankshaft   Note! t  Gradual introduction of a new generation of sealing flanges with PTFE seal (Teflon). The sealing flange with spring ring will continue to be offered as spare part. When fitting a new sealing flange, be careful to use the same type of sealing flange that was previously fitted. t  The sealing flange with a PTFE sealing ring is equipped with a sealing lip support ring. This support ring serves the function of a fitting sleeve and may not be removed prior to installation. t  Sealing flange and sender wheel must not be separated or twisted after removal from packaging. t  The sender wheel of a sealing flange with spring ring has an Elastomer coating on the sealing surface to crankshaft. This coating must never come into contact with dirt or grease. t  The sender wheel is held in its installation position by a fixture on the assembly device -T10017- locating pin. t  Sealing flange and seal are one unit and must be replaced together with the sender wheel only. t  The assembly appliance -T10017- maintains its installation position to the crankshaft via a guide pin which is inserted into a threaded hole in the pressure plate/drive plate.

A -  Hexagon nut B -  Clamping surface (ground section of spindle) C -  Tool bell housing D -  Socket head bolt E -  Guide pin F -  Locating pin A - Assembling sealing flange with sender wheel on assembly appliance -T10017-

–  Screw hexagon nut -A- to shortly before the clamping surface (ground section) -B- on the threaded spindle.

–  Clamp assembly appliance -T10017- in a vice on clamping surface (ground section) on threaded spindle. –  Press the assembly bell -C- downwards, so that it rests on the hexagonal nut -A--arrow-.   Note! Inner part of assembly appliance and assembly bell housing must be at same height (level).

–  Remove securing clip -A- on new sealing flange.   Note! The sender wheel must not be taken out of the sealing flange or twisted.

The locating hole -B- on the sender wheel -C- must align with the marking -A- on the sealing flange.

–  Place the sealing flange (with the forward side downwards) on a clean flat surface. –  Push the sender wheel (sealing lip support ring for PTFE sealing ring) -A- downwards in direction of arrow until it lies on the flat surface.

The upper edge of the sender wheel and the forward edge of the sealing flange must align -arrows-.

–  Place the sealing flange, with the forward side on the assembly appliance -T10017-, so that the locating pin -A- can be inserted in the sender wheel hole -B-.   Note! Ensure the sealing flange lies flat on the assembly appliance.

–  Push the sender wheel -B- (Sealing lip support ring for PTFE sealing ring) onto the surface of the assembly appliance whilst tightening the three knurled screws -A-, so that the locating pin cannot slide out of sender wheel hole.   Note! Ensure the sender wheel remains fixed on the assembly appliance when installing the sealing flange. B - Assemble the -T10017- assembly device with the seal flange onto the crankshaft flange Prerequisites l  Crankshaft flange must be free of oil and grease. l  Engine positioned at TDC No. 1 cylinder. Work sequence

–  Untighten hexagon nut -A- to end of threaded spindle. –  Press down the feed screw for the assembly device in the direction of the arrow until the hexagonal nut -A- comes into contact with the assembly hood -C-. –  Align flat side of assembly bell housing towards oil sump side of crankcase sealing surface.

–  Secure assembly appliance to crankshaft flange with hexagon socket head bolts -A-.   Note! Screw hexagon socket head bolts -A- into crankshaft flange (approx. 5 threads).

–  Screw two M6×35 mm bolts -A- into cylinder block to guide sealing flange. C - Fitting assembly appliance -T10017- onto crankshaft flange

–  Slide assembly bell housing -A- in direction of arrow by hand until the sender wheel -B- (Sealing lip support ring for PTFE sealing ring) lies against the crankshaft flange -C-.   Note! The assembly appliance guide pin -D- is guided into threaded hole in crankshaft during the fitting sequence. This ensure the sender wheel reaches its final installation position. –  Hold assembly bell housing in this position and screw both assembly appliance hexagon socket head bolts hand tight. –  Screw hexagon nut -E- onto threaded spindle by hand until it lies against the assembly bell housing -A-. D - Pressing sender wheel onto crankshaft flange with assembly appliance -T10017-

–  Tighten assembly tool hexagon nut with torque wrench -SAT 8010- and ring spanner -SAT 8010/24c-. Tightening torque: 35 Nm.   Note! A small air gap must be present between cylinder block and sealing flange after tightening hexagon nut to 35 Nm. E - Checking sender wheel installation position on crankshaft

–  Untighten hexagon nut -A- to end of threaded spindle. –  Remove the two M6×35 mm hexagon bolts -B- from cylinder block. –  Screw the three thumb wheels -C- out of sealing flange –  Pull assembly appliance assembly bell housing -D- back to hexagon nut -A- (Only for sealing flange with spring ring).

The sender wheel has the correct installation position on crankshaft when a gap of -a- = 0.5 mm exists between crankshaft flange -A- and sender wheel -B-.   Note! t  If the sealing flange has a PTFE sealing ring, completely unbolt the assembly appliance -T10017- and remove the sealing lip support ring. t  To enable the measurements to be shown more clearly the crankshaft flange is illustrated without the fitted assembly appliance -T10017-.

–  Place a vernier caliper against the crankshaft flange -A- (hatched area).

–  Measure the distance -a- between vernier caliper and sender wheel with a feeler gauge -A-. Is measurement -a- too small: –  Re-press sender wheel → Anchor. When dimension -a- is achieved: –  Remove assembly appliance. –  Tighten the new securing bolts for the sealing flange using alternate and diagonal sequence. Tightening torque: 12 Nm.

–  Install engine speed sender -arrow-. Tightening torque: 5 Nm –  Install sump → Chapter. –  Assemble the intermediate plate. –  Install flywheel using new bolts. Hold flywheel with counter-hold -T20075- and tighten to Tighten torque: 60 Nm + 1/4 turn (90°) further F - Re-pressing sender wheel

–  Slide assembly bell housing -A- to sealing flange -B- by hand. –  Screw two M6×35 mm bolts -C- into cylinder block to guide sealing flange -B-. –  Screw hexagon nut -D- along threaded spindle, by hand, until it contacts the assembly bell housing -A-.

–  Tighten assembly tool hexagon nut with torque wrench -SAT 8010- and ring spanner -SAT 8010/24c-. Tightening torque: 40 Nm –  Check installation position of sender wheel on crankshaft again → Anchor. If dimension -a- is too small again: –  Tighten hexagon nut to 45 Nm. –  Check installation position of sender wheel on crankshaft again → Anchor.