Troy-Bilt 12087 Owner's/Operator's Manual page 62

Troubleshooting
0;1 and work eccentric lever back and
forth by hand.
• Lubricate linkage that connects Wheel
Speed Lever to eccentric lever. Photo 5-48.
• Clutch inside transmission may be
binding. Disconnect linkage from ec-
centric lever and work eccentric lever
by hand. If difficult or impossible to
move, it may be due to a damaged key-
way on the wheel shaft. Contact
Technical Service Dept.
• Lubricate washers and castle nut on
pivot of lever. If necessary, remove roll
pin and back nut off 1/6th turn. Re-
place roll pin and test the movement.
• Apply grease to zerk fitting (if so
equipped) with grease gun until grease
appears around washers.
Connecting Rod
Photo 5-48: Check connecting rod,
shifting linkage and eccentric lever.
B. Lever shifts into FAST wheel gear,
but not into SLOW wheel gear-
• Connecting rod at end of lever might
be backwards, or bent in toward trans-
mission housing and hitting it. Other
shifting linkage might be bent.
Straighten or replace linkage. See
Photo 5-48.
• Clutch inside transmission may be
binding. See Problem 2-A.
C. Lever moves freely, but won't shift
in or out of gear-
• Eccentric shifting pin inside transmis-
sion may be broken (rare) or worn.
Disconnect linkage from eccentric lever
and try moving eccentric lever by hand.
See Photo 5-48. If lever moves easily,
contact the Technical Service
Department.
3
Wheels and Tines Won't Turn:
• Review operation of controls. See
Sections 3 and 4.
• Check condition and adjustment of
drive belt and reverse disc. See
Section 5.
• Mounting bolt for transmission drive
pulley may be loose. (See Photo 5-1).
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. See Section 3.
• Tines/PTO Clutch Lever may need
adjustment.
• Key for "dog" clutch on tine attach-
ment main drive shaft may be missing,
broken.
• Worm gears that drive the tine shaft
may be worn.
• Hardware holding tine holders to tine
shaft may be missing or broken. To
check, remove holders. See Section 5.
• Key for bronze worm gear on tine at-
tachment main drive shaft may be
missing or broken.
5
Tines Turn, But Wheels Won't:
• Check operation of Wheel Speed
Lever. Refer back to Problem 2.
• Hi-Pro key inside wheel clutch may
be missing, broken. If so, clutch will
not turn wheel shaft.
• FAST and SLOW speed wheel gears
may be worn. If only one gear is worn,
there will only be one wheel speed.
• Worm gear that drives pinion shaft and
pinion gears may be worn.
• FAST and SLOW speed pinion gears
may be worn. If only one gear is worn,
there will only be one wheel speed.
• Drive "dogs" on sides of wheel clutch
may be worn or broken. If only one side
of clutch is affected, there will only be one
wheel speed.
62
6
Wheels And Tines Turn On Top Of
Ground, But Stop Or Hesitate In Soil:
• Drive belt may be loose. See Section
5.
• Mounting bolt for transmission drive
pulley may be loose. See Photo 5-1.
7
Tiller Jumps While Tilling:
• Depth Regulator Lever set too deep
for soil conditions. Lower lever for
shallower setting.
• Engine throttle speed too fast.
• Tiller wheel speed too fast for soil
conditions. Change to LOW belt range
or SLOW wheel speed.
8
Depth Regulator Lever
Difficult To Move:
• Lubricate spring assembly and depth
adjustment bar. See Section 5.
• Check for bent depth adjustment bar.
9
Wheel And Shaft Move
Out To One Side:
• Snap ring on wheel shaft may be dis-
lodged from its groove. Raise wheels
off ground and check for back and
forth play in shaft. If there is play, one
or both snap rings is loose.
10
Tiller Pulls To One Side:
• Check tire pressure. See Section 5.
11
Tine Holder Bolt
Breaks Or Loosens:
• Earlier models have tine holder keys.
Check that keys are in keyways of tine
shaft. Without key in holder, left-side
tine bolt will tighten and break; right-
side bolt will loosen. See Section 5.
12
Poor Traction:
• Bar tread tires, tire chains, or wheel
weights may be needed. See
"Attachments."
13
Gear Oil Leak From Power Unit
Or Tine Affachment Transmissions:
• See Section 5.
14
Engine Lacks Power:
• Air cleaner restricted with dirt and/or
oil. See Section 5.