Pitch Pressure Check
Access the pitch block and pitch pressure test port at the right- rear of the trowel (Figure 44). Removal of the
Figure 44. Pitch Block
1.Install 3000 PSI range pressure gauge to pitch pressure test port on pitch block (Figure 45).
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 Out of Specification
If the pitch pressure check is out of specification, check for the following:
1.Correct hydraulic fluid level.
2.Plugged hydraulic oil filter
3.Loose or leaking fittings.
4.Ruptured/damaged hydraulic lines.
5.Faulty hydraulic pump.
6.Pitch Pressure Relief Valve no longer at factory setting.
The Pitch Pressure Relief Valve is SET AT THE FACTORY, and normally should not require adjustment. If all other systems are found not to be defective and the pitch relief valve is suspect, 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.
WARNING
DO NOT attempt to adjust the Pitch Pressure Relief Valve while the engine is running.
1. | Remove right grill guard and right rear seat frame panel. |
2. | With the engine OFF, remove the end cover on relief valve |
| (Item A, Figure 46). |
3. | Adjust the relief valve (Item B, Figure 46) with allen wrench |
| and reinstall the end cover. |
1000
00 | 3000 |
20 |
|
150 200
100250
50300
bar psi
WIKA
4000
5000
1
2
3
4. | Start the engine and check the pressure as described |
| earlier. (See Pitch Pressure Check) |
5. | If pressure requires further adjustment, shut the engine |
| down and repeat steps 2 through 4 until pressure check |
| reads 2300 PSI. |
1Pressure Guage - 3,000 PSI Range
2Access Pitch Block at
3Pitch Pressure Test Port
Figure 45. Pitch Pressure Check
Figure 46. Pitch Pressure Relief Valve
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