Valve Assembly Internal Leakage Test

Hydraulic Test Program - Valve Assembly Internal Leakage Test (Model 129)

Preliminary work:
Leveling valve pressure test

Preparation for Test
1. Check oil level in oil reservoir, correct if necessary.
2. Disconnect connecting rods (54, 55) at front and rear leveling valve levers (set levers to neutral position).
3. Disconnect leak oil line of suspension struts at front axle and close steel line.
4. Disconnect return line (T) at oil reservoir.

Special Tools











2 Hydraulic oil reservoir
3 Rear axle levelling valve
6 Front axle levelling valve
54 Front axle connecting rod
55 Rear axle connecting rod
LL Leak oil return line - left suspension strut, front axle distributor/valve unit
T Return line - oil reservoir ditributor valve unit
038f Coupling (from hydraulic kit)
038n Vent screw (from hydraulic kit)
50 Distributor valve
52 Distributor

Test: