Installing – Insert lock cylinder into door handle. – Clamp door handle in vise with protective pads. Attach mount -1- – and coupling plate -2- on lock cylinder. Install torsion spring -1- into lock – cylinder housing so that torsion spring end points toward rear. Position Assembly tool -T10009- with – narrow slot - arrow- onto torsion spring -1-. Press down outer sleeve of – Assembly tool - T10009- until it makes contact on mount -1-. Assembly tool - T10009- is depicted with a cut-out section to clarify following assembly steps. Turn Assembly tool -T10009- 180° – toward right until slot -arrow- points toward front. Press down center rod -1- of – Assembly tool - T10009-. Doing this compresses torsion spring. Torsion spring end springs out of slot – in assembly tool and locks in mount. Now, carefully lift – outer sleeve -1- of Assembly tool - T10009-. Now center rod -2- becomes visible, which is slid over lock cylinder. Lift Assembly tool -T10009- far – enough until groove in lock cylinder becomes visible. Torsion spring -1- – must be engaged in mount -arrow-. For assistance, torsion spring can – be pushed into slot in lock cylinder using a low screwdriver. – Remove assembly tool. Place paddle on – torsion spring and press downward. Torsion spring disengages from slot in lock – cylinder via circular motions and can be compressed further. – Insert locking washer. – Perform function test.