RE-013
2010
Rotating Electrics Flywheel
Ring Gear Failure
All Makes
Ring gear fails after fitting of new
flywheel or starter motor
In several cases when a starter motor or flywheel is replaced the original and new starter or flywheel ring gear fails
shortly afterwards.
When a starter motor is replaced it is imperative to ensure the bell housing is thoroughly cleaned and the flywheel ring
gear is thoroughly checked for any signs of damage. The flywheel ring gear is induction hardened so any damage occurred from the failed starter will remove the hardened surface and subsequent wear will be accelerated, producing the
results in the pictures below.
Wear on flywheel has removed
induction hardening, accelerating
wear when new starter has been
fitted
A similar issue happens when a new
flywheel is fitted and the original starter
has damaged or worn teeth. This will
cause accelerated wear on the new
flywheel and the original starter motor.
When a new flywheel is fitted, always
check the starter motor for any signs
of damage or wear, including wear
between the pinion and pinion shaft.
Replace if necessary. Always ensure
the gearbox bell housing is clear of any
flywheel dust and foreign objects when
fitting a new flywheel.
When an original starter motor is used
with a new flywheel, the worn pinion
teeth will not mesh cleanly with the
ring gear, causing accelerated wear on
both parts
www.valeoservice.co.uk
Valeo Service (UK) Ltd,
Heming Road, Washford, Redditch, Worcestershire, B98 0DZ
Tel: 01527 838300 Fax: 01527 523732