Problem | Possible Causes | |
|
| |
Cutting deck (or wing decks) will not | Engine RPM is too low. | |
raise. | Hydraulic oil level in reservoir is low. | |
| ||
| Lift arm pivots are binding. | |
| Relief valve in lift/lower control valve is stuck. | |
| Pilot valve in lift/lower control valve is damaged or sticking. | |
| Lift cylinder(s) is (are) damaged. | |
| Gear pump section for lift/lower control valve is inefficient. | |
|
| |
Cutting deck (or wing decks) raise, | Lift circuit lines or fittings are leaking. | |
but will not stay up. | Lift cylinder is damaged. | |
NOTE: Lift cylinders cannot provide | ||
Detents in lift/lower control valve are worn. | ||
an absolutely perfect seal. The cut- | ||
ting deck will eventually lower if left |
| |
in the raised position during storage. |
| |
|
| |
Front cutting deck drops too fast or | Flow control valve is not adjusted properly. | |
too slow. |
| |
|
| |
Cutting deck (or wing decks) will not | Lift arm pivots are binding. | |
lower. | Counterbalance pressure is excessive. | |
| ||
| Pilot valve in lift/lower control valve is damaged or sticking. | |
| Lift cylinder is damaged. | |
| Lift/lower control valve is worn or damaged. | |
|
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Hydraulic System | Page 4 | Groundsmaster |
