Service Manual

Flexplate ISB, ISBe and QSB (Common Rail [...]
Page 16-14 Section 16 - Mounting Adaptations - Group 16
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WARNING
Batteries can emit explosive gases. To reduce the
possibility of personal injury, always ventilate the
compartment before servicing the batteries. To
reduce the possibility of arcing, remove the negative
(-) battery cable first and attach the negative (-)
battery cable last.
WARNING
This component or assembly weighs greater than 23
kg [50 lb]. To prevent serious personal injury, be sure
to have assistance or use appropriate lifting
equipment to lift this component or assembly.
• Disconnect the batteries. Refer to Procedure 013-009
(Battery Cables and Connections) in Section 13.
• Remove the drive gear. Refer to OEM instructions.
Initial Check
For automotive and industrial applications, inspect the
flexplate ring gear teeth for damage.
If the flexplate ring gear is damaged, make sure to
evaluate the following possible causes prior to replacing
the flexplate.
Mechanical
A mechanical issue can typically be identified by seeing
damage to the ring gear of the flexplate in 3 distinct
locations for 6 cylinder engines (commonly called 120
degree milling), and 2 locations for 4 cylinder engines
(commonly called 180 degree milling). The following can
be causes for mechanical issues:
1 The possibility of improper starter motor spacing.
Refer to Procedure 013-020 (Starter Motor) in Section
13.
2 The interference between the ring gear land area and
the starting motor pinion. The wrong starting motor
might be installed. Refer to the original equipment
manufacturer's specifications.
3 The possibility of a defect with the starter motor pinion.
Inspect the pinion for nicks and burrs. If replacement
of the starting motor is necessary, Refer to Procedure
013-020 (Starter Motor) in Section 13.
4 The torque converter/transmission is damaged or
incorrectly mounted. Refer to the original equipment
manufacturer's specifications
5 Incorrect starting motor pinion to flexplate ring gear
pitch and teeth match. Refer to the original equipment
manufacturer's specifications.