STX-SERIES — MAINTENANCE
Pitch Pressure Check
Access the pitch block and pitch pressure test port at the right- rear of the trowel (Figure 29). Removal of the
Figure 29. Pitch Block
1.Install 3000 PSI range pressure gauge to pitch pressure test port on pitch block (Figure 30).
2.Activate left pitch switch.
3.Flatten blades (bottom out the pitch cylinders).
4.Continue to hold down pitch switch and record pressure.
Pitch Pressure Adjustment
If the pitch pressure check is out of specification, check the following:
1.Correct hydraulic fluid level.
2.Plugged hydraulic oil filter.
3.Loose or leaky fittings
4.Ruptured/damaged hydraulic lines.
5.Faulty hydraulic pump.
6.Pitch pressure ReliefValve no longer at factory setting.
The Pitch Pressure Relief Valve is SET AT THE FACTORY, and normally should require no adjustment. If all other systems are found not to be defective and the pitch relief valve is suspect, (loosened jam nut for example), the following steps can be used to adjust the valve.
CAUTION
NEVER allow the pitch pressure to exceed 2700 PSI or equipment damage may result.
1.Remove right grill guard and right rear seat frame panel.
2.Install 3000 PSI pressure gauge to pitch pressure test port on pitch block (Figure 30).
3.Loosen jam nut on pitch block relief valve (Item A, Figure 31).
4.Adjust the relief valve (Item B, Figure 31) with allen wrench to proper pressure (2300 PSI)
5.Tighten jam nut, remove gauge and reinstall grill guard and frame panel.
A
B
Figure 30. Pitch Pressure Check | Figure 31. Pitch Pressure Adjustment |
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