Leveling Valve Pressure Test

Hydraulic Test Program - Leveling Valve Pressure Test

Preparation for Test
1. Check oil level in oil reservoir, correct if necessary.
2. Model 129
Disconnect connecting rod at front and rear leveling valve levers (set levers to neutral position) (Figure 1).
Model 140
Disconnect connecting rod at rear leveling valve levers (set lever to neutral position) (Figure 2).
3. Depressurize hydraulic system by slowly opening bleeder screw (3p or Gp). Connect drain hose and place into container.
4. Connect test gauge to leveling valve bleeder screw.
Model 129
Front axle: Connection "6p"
Model 140
Rear axle: Connection "3p" or leveling valve connection S2.

Special Tools











Model 129
Figure 1



3 Rear axle leveling valve
3p Bleeder screw
6 Front axle leveling valve
6p Bleeder screw
50a Pressure supply screw

Test 1.0:

Test 2.0:

Model 140
Figure 2



2 Hydraulic oil reservoir
3 Rear axle leveling valve
3a Connecting lever
3p Bleeder screw
7 Connecting rod

Test 1.0 - 2.0: