Hydraulic System Pressure Test
- Disconnect pressure hose from oil pump. Attach Pressure Gauge (MB990662-01) and Adapters (MB990993-01 and MB990994-01). Tighten fittings to 22-29 ft. lbs. (30-39 N.m).
- Bleed system. See HYDRAULIC SYSTEM BLEEDING under LUBRICATION. Close gauge valve 3 times to bleed air from gauge. Start engine and let idle. Place thermometer in reservoir. Check fluid level. Add fluid as necessary.
- When fluid temperature reaches 131°F (55°C), check pressure. Refer to OIL PUMP PRESSURE SPECIFICATIONS table. Reinstall pressure hose. DO NOT twist hose or let hose interfere with adjacent parts. Replace oil pump if pressure is not to specification.
CAUTION:
DO NOT
keep shut-off valve closed more than 3 seconds at a time. DO NOT
keep steering wheel turned to lock for more than 10 seconds at a time.
OIL PUMP PRESSURE SPECIFICATIONS
| Application | psi (kg/cm2 ) | |
|---|---|---|
| Montero | ||
| Valve Closed | 1067-1166 (75-82) | |
| Valve Open (Standard) | 142 (10) | |
| Valve Open (Limit) | 218 (15) | |
| Pickup & Ram-50 | ||
| Valve Closed | 1067-1116 (75-82) | |
| Valve Open (Standard) | 114-142 (8-10) | |
| Valve Open (Limit) | 213 (14.7) | |