3-S1
L3130 · L3430 · L3830 · L4630 · L5030, WSM
TRANSMISSION
1. TROUBLESHOOTING
[1] GENERAL
W1014322
Symptom Probable Cause Solution
Reference
Page
Excessive
Transmission Noise
• Transmission fluid insufficient
• Gear worn or backlash improper
• Bearing worn or broken
• Shift fork worn
• Spline worn
• Snap rings on the shaft come off
• Spiral bevel pinion lock nut improperly
tightened
• Improper backlash between spiral bevel
pinion and spiral bevel gear
• Improper backlash between differential pinion
and differential side gear
Replenish
Replace
Replace
Replace
Replace
Repair or replace
Tighten
Adjust
Adjust
G-7, 8
3-S46 to
S48
3-S43
3-S43
3-S43
–
3-S36
3-S46
3-S47
Gear Slip Out of
Mesh
• Shift linkages rusted
• Shifter or shift fork worn or damaged
• Shift fork interlock ball spring weaken or
damaged
• Interlock ball fallen
• Synchronizer unit damaged
• Gears worn or broken
Repair
Replace
Replace
Reassemble
Replace
Replace
–
–
3-S27, S63
3-S27, S63
3-S44
–
Hard Shifting • Shifter or shift fork worn or damaged
• Shift fork bent
• Shift linkage rusted
• Shaft part of shift arms rusted
• Synchronizer unit damaged
Replace
Replace
Repair
Repair
Replace
–
–
–
–
3-S44
Gears Clash When
Shifting
• Clutch does not release
• Gears worn or damaged
• Synchronizer unit damaged
Adjust or repair
Replace
Replace
G-24
–
3-S44
Differential Lock Can
Not Be Set
• Differential lock shift fork damaged
• Differential lock shift fork mounting clevis pin
damaged
• Differential lock shifter pin bent or damaged
• Differential lock fork shaft bent or damaged
Replace
Replace
Replace
Replace
3-S39
3-S39
3-S39
3-S39
Differential Lock
Pedal Does Not
Return
• Differential lock pedal return spring weaken
or damaged
• Differential lock shifter pin bent or damaged
• Differential lock fork shaft bent
Replace
Replace
Replace
–
3-S39
3-S39
Excessive or
Unusual at All Time
• Improper backlash between spiral bevel
pinion and spiral bevel gear
• Improper backlash between differential pinion
and differential side gear
• Bearings worn
• Insufficient or improper type of transmission
fluid used
Adjust
Adjust
Replace
Replenish or replace
3-S46
3-S47
–
G-7, 8
Noise While Turning • Differential pinion or differential side gears
worn or damaged
• Differential lock binding (does not disengage)
• Bearing worn
Replace
Replace
Replace
3-S42
3-S39
–