Test results

Rock in the seat resting on the backrest; check the correct fastening to the floor (four M10 bolts)

Move on to Step 1

Bolts securing seat to floor slack

Retighten the seat to the floor following the correct tightening cycle

Check the fastenings of the guides to the seat (5 bolts) if the noise disappears

Move on to Step 2

Noise disappears

Retighten the guides to the seat following the correct tightening cycle

Check for clearance at the seat lifting hinges and for noise at the torsion spring

Move on to Step 3

1. Excessive clearance in the seat lifting hinges

2. Noise from torsion spring

1. Replace the seat lifting assembly

 Op. 7045A36 DRIVER'S SEAT MANUAL HEIGHT ADJUSTMENT DEVICE - R.R

2. Lubricate the torsion spring and check the condition of the bush

Check that the cushion springs are correctly fastened under the base

Move on to Step 4

Detachment of spring mounting from front/rear crossmember

Reattach cushion springs to front/rear crossmembers

Check the condition of the cushion spring terminal moulding and spring join moulding

End of diagnosis

1. Spring terminal moudling broken or spring joint moulding broken

2. The noise persists

1. Replacement of front cushion spring assembly plate

2. Lubricate that contact areas of the spring moulding with molybdenum disulphide, if the noise persists move on to Step 5

Check that the backrest is correctly fastened under the base of the cushion (four M8 bolts, two on each side)

End of diagnosis

Fixing bolts loosened

Retighten the backrest to the base under the cushion following the correct tightening cycle