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New here! Hi to everyone, I have 2 Topkicks 89 and 91 both car haulers (my private use only). The 91 was being worked on by a mechanic who tried to rebuild the power steering/brake booster pump because of a front seal leak. After many tries he can't seem to get it right. It keeps blowing the seal out when the engine revs. I'd like to buy a new or reman pump but this one looks like a 1980-1990 pump and all the searches for a 1991 pump bring me to a different design. Is it possible mine being a 1991 could have been fitted with a phased out leftover design when new? I don't want to buy on looks alone but I need some help here. 

Edited by rustyoldcars
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  • 2 weeks later...

You best bet might be to have a dealer look the pump up.  It's probably not available anymore but you could search for it by part number and have a better chance of getting the right one.  There were many different pumps for those trucks, some were steering only and some were for steering and Hydro-boost brakes.  I don't remember if the pumps changed in 1991, but I do remember they sold 2 different types of TopKick in 1990, the new generation and the old Caterpillar 3208 powered version.. 

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Thank you I did a ton of research. GM dealers were no help. I somehow stumbled upon by luck a rebuilt supplier (Lares® - Remanufactured Power Steering Pump #4017
 https://www.carid.com/lares/remanufactured-power-steering-pump-mpn-4017.html?singleid=3510501573)

 

from Carid.com  same pump used on a 1975 International Travelall.  my tracking shows it being delivered today so I should be able to confirm if it is a replacement. Again a thank you 

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