| Re: We need help please [message #311098 is a reply to message #311096] |
Tue, 29 November 2016 23:47   |
Bullitthead
Messages: 1411
Registered: November 2013
Karma:
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Senior Member |
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Not a GMC, and have no idea who made the systems, but maybe we can help...
Make sure the drive belt is still turning the pump and then:
1) Check the fluid level in the pump reservoir and check for a leak if it is low.
2) The bypass valve at the output connection of the pump could be blocked with debris or is malfunctioning.
3) If there is any filter in the system (including a screen in the reservoir), it may be blocked and need to be cleaned or replaced.
4) If the steering and brake systems are in series with each other (fluid flows from one to the other and then back to the pump and there is only 1 high pressure line to only 1 of the systems), one of the systems may have failed.
5) The new pump is bad.
6) The pulley on the pump has given up and is spinning but not turning the pump. Actually had this happen to me on a 1988 Ford F-150. It had a plastic pulley with a metal insert that was pressed on to the pump shaft, and the plastic gave up its grip on the insert.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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