Appendix A: Troubleshooting - Troy-Bilt 12090 Owner's Manual

Appendix A: Troubleshooting
CHECK OR TEST
(Checkor test in sequence shown
until problem is resolved.)
Engine
won't start
PROBLEM
Engineshutsoff when
Wheels/Tines/PTO Drive
Lever is ahiRedinto
FORWARD
Enginedoes not shutoff
when Forward Interlock
Levers are released while
Wheels/Tines/PTO Drive
Lever is in FORWARD
Throttle Lever in START position X
Wheels/Tines/PTO Drive Lever
in NEUTRALposition X
Forward Interlock Wire Harness
connector securely mated X X
Forward Interlock Levers not being
squeezedprior to shifting Wheels/
Tines/PTO Drive Lever to X
FORWARDposition
Visually inspect for bare, broken
or disconnected wires X X
Check handlebar wire harness X X
Check transmission wire harness X X
Troubleshooting Procedures
1 Wheels/Tines/PTO Drive Lever:
A. Lever does notstay in FORWARD-
. Drive belt may be too tight. Raise belt
adjustment block a little (Sect. 5).
• Clutch pawl spring at end of lever may be
overstretched, install new spring.
B. Lever hard to shift into REVERSE-
. Check reverse disc for wear (Sect. 5).
• Check adjustment of reverse disc and/or
reverse spring and plunger assy. (Sect. 5).
• Clean and re-lubricate motor mount bars,
belt adjustment block and linkages on lever
(Sect. 5).
C. Tiller staysin REVERSEwhenlever is
released-
. Lubricate motor mount bars, belt adjust-
ment block and linkages on lever (Sect. 5).
• Check adjustment of reverse spring and
plunger (Sect. 5). If problem persists,
contact Technical Service Department.
D. Leversticks in FORWARD-
. Lubricate motor mount bars, belt adjust-
ment block, and linkages on lever (Sect. 5).
If problem continues, contact the Technical
Service Department.
E. Leverhard to shift into FORWARD-
. Follow advice for Problem 1-D. Also check
for possible bent motor mount bar that could
be binding in engine mount holes.
2 Wheel Speed Lever:
A. Lever hard to shift, or sticksin FAST or
SLOW wheelgear positions-
Figure 5-43: Check connecting rod,
shifting linkage and eccentric lever.
• Lubricateeccentricleverat rearof power
unit transmission(Figure5-43). If rust is
present,usepenetrating oil and work
eccentricleverbackandforth by hand.
• Lubricatelinkageto WheelSpeedLeverto
eccentriclever(Figure543).
• Clutchinsidetransmissionmay be binding.
Disconnectlinkagefrom eccentricleverand
work eccentricleverby hand. If difficult or
impossibleto move,it may be dueto a
damagedkeywayon thewheelshaft.
ContactTechnical S erviceDepartment.
• Lubricatewashersandcastlenut on pivot
of lever. If necessary,removeroll pin and
back nut off 1/6thturn. Replace roll pin and
test the movement.
• Applygreaseto zerkfitting (if so equipped)
with greasegun until greaseappearsaround
washers.
B. Levershifts into FASTwheel gear, but
not into SLOW wheel gear-
. Connecting rod at end of lever might be
backwards, or bent in toward transmission
housing and hitting it. Other shifting linkage
might be bent. Straighten or replace linkage
(Figure 5_43).
• Clutch inside transmission may be binding
(Problem 2_A).
C. Levermoves freely, but won't shift in or
out of gear-
• Eccentric shifting pin inside transmission
may be broken (rare) or worn Disconnect
linkage from eccentric lever and try moving
eccentric lever by hand (Figure 543). If
lever moves easily, contact the Technical
Service Department.
3 Wheels and Tines Won't Turn:
• Review operation of controls (Sect. 3 & 4).
• Check condition and adjustment of drive
belt and reverse disc (Sect. 5).
• Mounting bolt for transmission drive pulley
may be loose. (See Figure 5q). If so, drive
belt or reverse disc will turn pulley, but
pulley won't turn main drive shaft.
• Worm gears that drive wheel and tiller
shafts may be worn.
4 Wheels Turn, But Tines Won't:
• Tines/PTO Clutch Lever must be in ENGAGE
position (Sect. 3).
• Tines/PTO Clutch Lever may need adjust-
ment.
• Keyfor dog clutch on fine attachmentmain
driveshaft may be missing,broken.
• Wormgearsthat drivethe tine shaft may
be worn.
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