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| TROUBLESHOOTING | |
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| Troubleshooting |
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Symptom | possible problem | Solution | |
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| Stop switch malfunction? | Make sure that the stop switch is functioning when the | |
| operator is seated. Replace switch if necessary. | ||
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| Look at the fuel system. Make sure there is fuel being | |
Engine running rough or not at all. | Fuel? | supplied to the engine. Check to ensure that the fuel | |
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| fi lter is not clogged. | |
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| Ignition? | Check to ensure that the ignition switch has power and | |
| is functioning correctly. | ||
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| Bad contacts? | Replace switch. | |
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Safety stop switch not functioning. | Loose wire connections? | Check wiring. Replace as necessary. | |
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| Other problems? | Consult engine manufacturer’s manual. | |
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| Make sure blades are in good condition, not excessively | |
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| worn. Finish blades should measure no less than 2 | |
| Blades? | inches (50mm) from the blade bar to the trailing edge, | |
| combo blades should measure no less that 3.5 inches | ||
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| (89mm). Trailing edge of blade should be straight and | |
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| parallel to the blade bar. | |
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| Check that all blades are set at the same pitch angle | |
| Pitch Adjustment? | as measured at the spider. A fi eld adjustment tool | |
| is available for height adjustment of the trowel arms | ||
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| (contact Parts Department). | |
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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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Trowel bounces, rolls concrete, or makes uneven |
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| Check the trowel arm bushings for tightness. This can | ||
swirls in concrete. |
| be done by moving the trowel arms up and down. If | |
| Trowel arm bushings? | there is more than 1/8 inch (3.2 mm) of travel at the | |
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| tip of the arm, the bushings should be replaced. All | |
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| bushings should be replaced at the same time. | |
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| Check the fl atness of the thrust collar by rotating it on | |
| Thrust collar? | the spider. If it varies by more than 0.02 inch (0.5 mm) | |
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| replace the thrust collar. | |
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| Check the thrust collar by rocking it on the spider. If it | |
| Thrust collar bushing? | can tilt more than 1/16 inch (1.6 mm) - as measured at | |
| the thrust collar O.D., replace the bushing in the thrust | ||
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| collar. | |
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| Thrust bearing worn? | Check the thrust bearing to see that it is spinning freely. | |
| Replace if necessary. | ||
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| The main output shaft of the gearbox assembly should | |
| Main shaft? | be checked for straightness. The main shaft must run | |
| straight and cannot be more than 0.003 inch (0.08 mm) | ||
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Machine has a perceptible rolling motion while |
| out of round at the spider attachment point. | |
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| Check to make sure that both fi ngers of the yoke press | ||
running. | Yoke? | ||
evenly on the wear cap. Replace yoke as necessary. | |||
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| Check to ensure that each blade is adjusted to have the | |
| Blade Pitch? | same pitch as all other blades. Adjust per maintenance | |
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| section in manual. | |
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page 48 — HHXg5
