C 3500 Truck 2WD V8-305 5.0L (1988)
Power Steering Line/Hose: Customer Interest
P/S - Whine On Cold Start
Number:
88-355-3B
Section:
3B
Date:
OCT., 1988
Subject:
POWER STEERING WHINE ON COLD START
Model and Year:
1988 C/K 1,2,3
TO:
ALL CHEVROLET DEALERS
The power steering pump on some 1988 C/K trucks may whine on cold start. This can be caused by improper clamping of the pump inlet hose to the
inlet tube. This condition can allow air to be pulled into the pump system. Low power steering fluid level may also contribute to the condition.
FIGURE 1 - POWER STEERING PUMP HOSE CONNECTIONS
SERVICE PROCEDURES (Figure No. 1)
To remedy the above condition, check the pump inlet hose clamp for proper installation and the power steering fluid for proper level. Inspect and repair
condition as detailed below.
INSPECTING CLAMPS AND HOSES
Check Oetiker clamp (3) on the pump inlet hose assembly (2) for tightness. When the clamp is initially installed, some degree of springback is normal.
The springback should result in no more than a 1.5 MM (.06 in.) gap in the clamp as shown in view "C" of Figure No. 1.
If gap is excessive, remove old clamp and install new clamp. New clamp and hose must be installed on tube to dimensions shown in view "C". Crimp
new clamp (3) down to zero gap and allow clamp to spring back. Check for 1.5 mm (.06 in.) maximum gap. Use crimping tool J35910 to obtain