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| troubleshooting | |
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| Troubleshooting | ||
symptom | possible problem | solution | |
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| Other problems? | Consult engine manufacturer’s manual. | |
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Safety stop switch not functioning. | Loose wire connections? | Check wiring. Replace as necessary. | |
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| Bad contacts? | Replace seat cushion (contains the switch). | |
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| Make certain blades are in good condition, not | |
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| excessively worn. Finish blades should measure no | |
| Blades? | less than 2"" (50mm) from the blade bar to the trailing | |
| edge, combo blades should measure no less that 3.5"" | ||
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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 | |
| Spider? | as measured at the spider. A fi eld adjustment tool is | |
| available for height adjustment of the trowel arms (see | ||
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| 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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| Check the trowel arm bushings for tightness. This can | |
If trowel “bounces, rolls concrete, or makes uneven |
| be done by moving the trowel arms up and down. If | |
swirls in concrete”.. | Trowel arm bushings? | there is more than 1/8"" (3.2 mm) of travel at the tip of | |
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| the arm, the bushings should be replaced. All bushings | |
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| 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"" (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"" (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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| Blade pitch? | Check blades for consistent pitch. Adjust per | |
| Maintenance Section instructions if necessary. | ||
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Machine has a perceptible rolling motion while | Spider Finger Screws? | Adjust per procedure in Maintenance Section. | |
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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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NOTICE
Refer to MQ Setup/Inspection/Test Procedures Manual for Troubleshooting Details.
page 36 — stxd6i
