Cub Cadet Challenger 550, Service Manual

Page: 142 / 255

4‐46
Engine
Inspect the pinion gears
• Drive pinion gear(1)
•
Driven pinion gear(2)
Look at the teeth for pitting, galling
or wear
• O-ring
Replace
•
Bearings
Look for pitting or damage.
•
Universal joint movement
Look for smooth movement.
Selecting the middle drive and driven gear
shims.
•
Check gear lash
Middle drive gear shim (1)
Middle driven gear shim (2)
Middle gear lash 0.1 ~ 0.3 mm
Measure gear lash
• Temporarily install the left
crankcase half.
•
Wrap a rag around a screwdriver
and insert it into the right crankcase
speed sensor hole to hold the
middle driven gear.
•
Attach a dial gauge.
6.7
mm or 0.26 in
Measure at four points rotating 90
degrees each time.
If gear lash is incorrect adjust by
changing the shims.
Installing the middle driven shaft
•
Bearing retainer(1)
Bearing retainer 80 Nm or 59 ft lbs
Attach the ring nut wrench (2)
Caution:
The middle driven shaft bearing
Retainer has left handed threads,
to tighten turn it counterclockwise.