
Copyright Meritor, Inc., 2020
MM-0861 / Revised July 2020
Page 52
Printed in USA
5
Prepare Parts for Assembly
6. Inspect the declutch and output shaft components, if applicable:
a.
Inspect the clutch collar internal splines, external declutch
teeth and shift for grooves. Replace worn, cracked, or
damaged collars.
b. Inspect the collar pads of the shift fork for wear. If the pads
are worn, replace the shift fork.
c.
Inspect the declutch shaft and yoke for wear, stress and
cracks at the splines, shaft and yoke ears. Replace worn or
cracked shafts and yokes.
d. Inspect the declutch or PTO push rod and piston for wear or
damage. Replace worn or damaged parts.
7. Inspect the rotor, housing, and idler of the oil pump, if equipped,
for scoring. Inspect the drive tab of the rotor assembly. Inspect
the splines on the pump inner rotor for cracks along the spline
area. Also, check for excessive wear. Replace the pump if these
conditions exist.
8. Remove and inspect the plug at the end of the input shaft. Verify
the orifi ce is clear of debris.
Helical Gears
Inspect the helical gear teeth, splines and journals. If any of the follow-
ing conditions exist, replace the gear.
• A crack in the root of a tooth or along the tooth fl ank.
CRACK
• Severe scoring or fretting on the surface of a tooth. Gears
with scoring and fretting on the teeth, but without cracks, may
continue to operate satisfactorily with higher noise.
SPALLING
• Cracks along the internal journal of the input gears.
CRACK
• Deep gouges or metal transfer along the input gear journals.
DEEP GOUGES
• Chipped or severely worn shifting splines on the input gears.
• Chipped or cracked splines on the output gears.
Shafts
Inspect the input and output shafts for damage to the gear journals,
shifting splines, threads and gear retaining splines. If any of the follow-
ing conditions exist, replace the shaft.
• Deep gouges or metal transfer along the input shaft journals.
METAL
TRANSFER
• Chipped or worn shifting splines on the input shaft.
Summary of Contents for MTC-4208X Series
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