Troubleshooting, Problem possible cause correction – Troy-Bilt 644H-Bronco User Manual
Page 25
![background image](/manuals/210698/25/background.png)
25
Section 5: Maintenance
TROUBLESHOOTING
Before performing any corrections, refer to the appropriate information in this Manual, or in the Engine Owner’s Manual, for the
correct safety precautions and operating or maintenance procedures. Contact your local authorized Engine Service Dealer for
engine service. Contact your local authorized equipment dealer or the factory for all other service problems.
PROBLEM POSSIBLE
CAUSE
CORRECTION
Engine does
1. Spark plug wire disconnected.
1. Reconnect wire.
not start.
2. Engine Throttle Control Lever incorrectly set.
2. Put lever in START position.
3. Fuel tank empty.
3. Add fuel.
4. Choke control (if so equipped) in incorrect position.
4. See Engine Owner’s Manual.
5. Stale gasoline.
5. Drain fuel and add fresh fuel.
6. Dirty air filter(s).
6. Clean or replace filter(s).
7. Defective or incorrectly gapped spark plug.
7. Inspect spark plug.
8. Carburetor out of adjustment.
8. See Engine Service Dealer.
9. Misadjusted throttle control cable.
9. See Engine Service Dealer
10.Dirt or water in fuel tank.
10. See Engine Service Dealer.
Engine runs poorly.
1. Defective or incorrectly gapped spark plug.
1. Inspect spark plug (see Engine Owner’s Manual).
2. Dirty air filter(s).
2. Clean or replace (see Engine Owner’s Manual).
3. Carburetor out of adjustment.
3. See Engine Service Dealer.
4. Stale gasoline.
4. Replace with fresh gasoline.
5. Dirt or water in fuel tank.
5. See Engine Service Dealer.
6. Engine cooling system clogged.
6. Clean air cooling system (see Engine Owner’s Manual).
Engine overheats.
1. Engine cooling system clogged.
1. Clean air cooling area (see Engine Owner’s Manual).
2. Carburetor out of adjustment.
2. See Engine Service Dealer.
3. Oil level is low.
3. Check oil level (see Engine Owner’s Manual).
Engine does not
shut off.
1. Misadjusted throttle control or ignition switch.
1. See Engine Owner’s Manual or Engine Service Dealer.
Wheels and Tines
1. Improper use of controls.
1. Review Sections 3 and 4.
will not turn.
2. Worn, broken, or misadjusted drive belt(s).
2. See “Checking Drive Belt Tension,” Section 5.
3. Internal transmission wear or damage.
3 Contact local dealer or the factory.
4. Bolt loose in transmission pulley.
4. Tighten bolt.
Tines turn, but
1. Wheel Drive Pins not in WHEEL DRIVE.
1. See “Wheel Drive Pins” in Section 3.
wheels don’t.
2. Internal transmission wear or damage.
2. Contact local Dealer or the Factory.
Wheels Turn, but
1. Tine holder mounting hardware missing.
1. Replace hardware.
Tines Don’t.
2. Internal transmission wear or damage.
2. Contact local Dealer or the Factory.
Poor tilling
1. Worn tines.
1. See “Tines” (Section 5).
performance.
2. Improper Depth Regulator setting.
2. See “Tilling Tips & Techniques,” Section 4.
3. Incorrect throttle setting.
3. See Section 4.
4. Forward Drive Belt slipping.
4. See “Checking Forward Drive Belt Tension,” Section 5.
- 634F--Bronco
- TB2450
- 12190-3HP
- 13A-344-563
- 830
- TB230
- 769-00425A
- 14049
- TUFFY 630CN
- 52066
- Mustang Colt ZT
- Mustang Colt ZT
- 12068-7HP
- 634K--ProLine
- Mustang RZT
- 12235
- 13028
- 70
- 640
- 640
- TB110
- 12209
- 683-Horse
- 665B
- 540
- 630C-Tuffy
- 52057
- RZT 50
- YM1500
- YM1500
- TB475SS
- Tuffy 12155
- 11A-436N063
- 12227-3.75HP
- 466
- 2-Cycle Trimmer TB32 EC
- Super Bronco
- 12217-3.5HP
- TB15CS
- TUFFY 630C
- TB2246
- 12157
- 68J-Horse
- 682
- TB130
- 12214-5.5HP
- Colt RZT
- 643C Tuffy/Bronco
- 12215
- 31/2 HP
- TB415CS
- 549
- REAR-TINE TILLER 675B
- TUFFY 634K
- 20 Volt Lithium-Ion Battery-Powered Trimmer TB60AF
- TBSS
- PONY 664D
- 12060
- PONY E666MM
- 12087C
- Transmatic Lawn Tractor 77T
- 682J-Horse
- 682J
- 2-Cycle Gasoline Trimmer/Brushcutter TB90BC
- 13095
- 3312GR
- 13074-GTX 18
- 436
- TUFFY 643C
- TB45E
- 640C-Tuffy
- TUFFY CRT 640C
- TB144
- TB144
- TB2000
- 12211
- TB70SS
- 24A-070F766
- Pro Line
- Pro Line
- TB55REX
- 15008
- 643B Super Bronco
- TB245CS
- TB25ET
- 12001C
- AutoDrive 604
- TB490BC
- GT54
- TRU CUT 100
- 644H
- 13101 - GTX 16
- 460
- 13053-15HP
- Series 540
- 13035
- J830
- TB270 ES
- 24B-060F766
- 258
- ARBRE DROIT
- ARBRE DROIT
- T-106
- 13104
- TB590BC
- 645A-Bronco
- TB55B
- TB10CS
- HYDROSTATIC LAWN TRACTOR - HORSE 769-06304
- series 650
- E683F
- TB65REX
- 12087
- 12090
- 12234
- TB65SS
- TB26TB
- 12185
- 52052
- 24C-060F063
- TB554
- TB554
- E666M-Pony
- TB22 EC
- 4-Cycle Gas Trimmer TB525 EC
- TB3000
- J860
- 340
- TBR18
- 769-03618
- TUFFY 1634A
- TB260
- P/N 769-00485A
- TB350 XP
- 148H
- GTX 18
- TB20DC
- 52067 - 5HP
- 12180
- TB154
- 643D - Tuffy/Bronco CRT
- TB75SS
- 1900678
- PRO LINE 644HMBRONCO
- TB495
- TBAH
- 12065
- 680
- 680
- TB25CS
- Straight Shaft Trimmer
- SUPER BRONCO TB415CS
- 449
- 654J
- RZT MUSTANG ZT50
- 12168
- 12159
- TB26CO
- TB310QS
- E666M
- E666M
- V560
- 634B-Super Bronco
- TBGC
- 41AC55RP966
- 41AC55RP966
- TB525CS
- 675B--Pony
- TB20CS
- TB20CS
- TB25C5
- 12001
- 1900634A
- 664D-Pony
- 12097
- TB90BC
- RZT SERIES ZT42
- 106
- 52065
- 440
- TBC57
- 660
- 660
- 52064
- 650
- Automatic Lawn Tractor
- 429
- tb25ght
- TB50
- 12194
- 12165
- 12183
- 2-Cycle Trimmer TB2040 XP
- 12212
- F753B
- 12204-10HP
- TB32CS
- TB475SS EU
- 12191-5HP EN
- E682L EN
- 645A Super Bronco ES
- 20” Rotary Mower — Model Series 100
- 24A-060F063
- 640 Series
- Models 721
- BRONCO 5 HP
- Pony
- Pony
- Bronco
- Horse