HTN-SERIES—TROUBLESHOOTING (TROWEL)
TABLE 6. TROUBLESHOOTING
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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| Safety Stop Switch malfunction? | Make sure that the Safety Stop Switch is functioning when the | |
| operator is seated; replace switch if necessary. | ||
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| Fuel? | Look at the fuel system. Make sure there is fuel being supplied to | |
Engine running rough or not | the engine. Check to ensure that the fuel filter is not clogged. | ||
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at all. |
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Ignition? | Check to ensure that the ignition switch has power and is | ||
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| functioning correctly. | ||
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| Other problems? | Consult engine manufacturer’s manual. | |
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| Loose wire connections? | Check wiring. Replace as necessary. | |
Safety Stop Switch not |
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functioning. | Bad contacts? | Replace switch. | |
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| Make certain blades are in good condition, not excessively worn. | |
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| Finish blades should measure no less than 2" (50mm) from the | |
| Blades? | blade bar to the trailing edge, combo blades should measure no | |
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| less that 3.5" (89mm). Trailing edge of blade should be straight | |
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| and parallel to the blade bar. | |
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| Spider? | Check that all blades are set at the same pitch angle as | |
| measured at the spider. A field adjustment tool is available for | ||
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| height adjustment of the trowel arms (see Optional Equipment). | |
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| Bent trowel arms? | Check the spider assembly for bent trowel arms. If one of the | |
| arms is even slightly bent, replace it immediately. | ||
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If trowel “bounces, rolls |
| Check the trowel arm bushings for tightness. This can be done by | |
Trowel arm bushings? | moving the trowel arms up and down. If there is more than 1/8" | ||
concrete, or makes uneven | |||
(3.2 mm) of travel at the tip of the arm, the bushings should be | |||
swirls in concrete”. |
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| replaced. All bushings should be replaced at the same time. | ||
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| Thrust collar? | Check the flatness of the thrust collar by rotating it on the spider. | |
| If it varies by more than 0.02" (0.5 mm) replace the thrust collar. | ||
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| Check the thrust collar by rocking it on the spider. If it can tilt | |
| Thrust collar bushing? | more than 1/16" (1.6 mm) [as measured at the thrust collar O.D.], | |
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| replace the bushing in the thrust collar. | |
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| Thrust bearing worn? | Check the thrust bearing to see that it is spinning free. | |
| Replace if necessary. | ||
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| Blade pitch? | Check blades for consistent pitch. Adjust per Maintenance section | |
| instructions if necessary. | ||
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| The main output shaft of the gearbox assembly should be | |
| Main shaft? | checked for straightness. The main shaft must run straight and | |
Machine has a perceptible | cannot be more than 0.003" (0.08 mm) out of round at the spider | ||
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| attachment point. | ||
rolling motion while running. |
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| Yoke? | Check to make sure that both fingers of the yoke press evenly on | |
| the wear cap. Replace yoke as necessary. | ||
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HTN- SERIES •