Governor pressure test

7. Disconnect 0 to 7 bar gauge and connect 0 to 20 bar gauge to inspection plug hole.
8. Select ’D3’ or ’D4’, release handbrake and allow wheels to rotate freely.
9. Using assistance, hold throttle control fully open.
10. Run engine at 1000 rev/min and observe pressure recorded on gauge: Standard = 8.2 to 8.9 bar Service limit = 7.5 bar
11. If pressure is low, throttle valve B is faulty.
12. On completion of test, disconnect gauge.
13. Fit a new sealing washer to inspection plug, fit and tighten plug to 18 Nm.
14. Connect cable to throttle control drum.
15. Carry out governor pressure test.

Governor pressure test

1. Run engine until it reaches normal operating temperature.

2. Remove governor pressure inspection plug, discard sealing washer.
3. Connect gauge (0 to 7 bar) of gauge set 18G 1554 to inspection plug hole.
4. Select ’D4’, release handbrake and allow wheels to rotate freely.
5. Increase engine speed until speedometer reads 38 mph, 60 kph and observe pressure recorded on gauge: Pressure = 1.7 to 1.9 bar
6. If pressure is low or non-existent, governor valve is faulty.
7. On completion of test, disconnect gauge.
8. Fit a new sealing washer to inspection plug.
9. Fit and tighten plug to 18 Nm.