Hydraulic Oil Pump Test - Section 32

Preparation for Test
1. Depressurize rear axle hydraulic system by slowly opening bleeder screw (57a).
2. Connect test gauge (038) with hose (038e) to rear axle distribution fitting (57) in place of bleed screw (57a).
3. Check oil level in oil reservoir, correct if necessary.
4. Connect HHT (refer to section 0).
5. Disconnect return line (T) at oil reservoir (2) and using a suitable hose (061), hold it in a measuring glass.


NOTE: To perform this rest, the oil fill quantity must be increased by 0.5 liters. If the oil reservoir was empty, the hydraulic oil pump must first be bled by disconnecting the high pressure flexible hose at the steel line. Run the engine and hold the hose into a container until the oil exits free of bubbles.


NOTE: Monitor oil level during testing, air must not be allowed to enter the system through the hydraulic pump.

Special Tools:

Figure 1:

Step 1.0: