John Deere 318 User Manual
20. Inspect differential case and cover for wear, cracks
or damage. Replace case and/or cover if necessary.
Inspect case and cover bearing surfaces of output shaft
(A), intermediate shaft (B) and countershaft (C) for wear,
cracks or damage.
Inspect depth of oil grooves (D) in case and cover. If
depth of grooves are less than 0.25 mm (0.010 in.),
replace case and/or cover.
Inspect reinforcement ribs (E). If ribs protrude above
wear surface, file or grind flush.
Inspect bearing races (F) for wear. If bearing race is
worn away, replace bearings.
A—Output Shaft Bearing Surface
B—Intermediate Shaft Bearing Surface
C—Countershaft Bearing Surface
Differential Case Shown
21. Inspect output shaft bearings (A), intermediate shaft
bearings (B) and countershaft bearings (C) in case (D)
and cover (E) for wear, damage or corrosion.
Check that bearings turn freely.
Inspect case and cover for cracks.
Inspect axle shaft seals (F) in case and cover.
Two-Speed with differential lock; inspect shift rod seals
for wear or damage.
A—Output Shaft Bearings
B—Intermediate Shaft Bearings
F—Axle Shaft Seals
Differential/Disassemble and Inspect
316, 318 & 420 Lawn and Garden Tractors