Steering - Power Steering Pump Replacement Tips
Information IB08-10-S001Issue Date: FEBRUARY 2008
Diagnostic Tips/Recommendations When Power Steering Pump Replacement Is
Necessary
(This Bulletin Supersedes IB06-10-S001)
Affected Vehicles
2003-2008 Isuzu Ascender
2007-2008 Isuzu i-290/i-370 (TI)
2006 Isuzu i-280/i-350 (TI)
Service Information
This bulletin is being revised to update Model Years.
In order to help improve customer satisfaction and reduce comebacks, use the following tips when replacing a power steering pump:
1. Low or no pressure from the power steering pump may be the result of dirty or contaminated fluid, which could cause the pressure relief valve to stop functioning. Using the proper tools, flush and bleed the power steering system. Any residual contaminants will result in pump failure.
2. When removing the pulley, use the proper special tools. Because the pulley alignment is critical, distorting the pulley may damage bearings on the new power steering pump.
3. Be sure to use only the new O-rings included with the power steering pump. The new reservoir O-ring must be lubricated with OE-specific power steering fluid prior to installation. Also make sure that the control valve O-ring is in its exact groove position and is NOT covering the pressure bypass hole.
4. Bleed the power steering system according to the procedures/recommendations in the Service Manual.
Following these procedures and using the correct tools and fluids should help ensure that the new power steering pump operates properly. Skipping steps may cost you time and trouble later.
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