Hydraulic System Pressure
- Disconnect pressure hose from power steering pump. Attach Pressure Gauge (MB990662-01) and Adapters (MB990993-01 and MB990994-01). See Fig 1. Tighten fittings to 22-29 ft. lbs. (30-39 N.m).
- Bleed system. See HYDRAULIC SYSTEM BLEEDING under LUBRICATION. Turn wheel several 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 122-140°F (50-60°C), check pressure. See POWER STEERING PUMP PRESSURE SPECIFICATIONS table. Reinstall pressure hose. Do not twist hose or let hose interfere with adjacent parts. Replace power steering pump if pressure is not within specification. Bleed system.
CAUTION:
DO NOT keep shutoff valve closed more than 3 seconds at a time. DO NOT keep steering wheel turned to full lock position for more than 10 seconds at a time.
POWER STEERING PUMP PRESSURE SPECIFICATIONS
| Application | psi (kg/cm2 ) |
|---|---|
| Valve Closed Or Wheel At Full Lock | 1205-1305 (85-92) |
| Valve Open (Standard) | 114-142 (8-10) |