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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: KY..Rob on April 11, 2010, 09:46:53 pm

Title: What is (Hydroboost)?
Post by: KY..Rob on April 11, 2010, 09:46:53 pm

I'm getting ready to order a new power steering pump and hoses. After reading the thread about differences in hoses, and not being a "Hydroboost" System. What is a Hydroboost system? what years did they come in? or is it just an upgrade.

Thanks,

Rob..

Title: Re: What is (Hydroboost)?
Post by: Blazin on April 11, 2010, 11:31:00 pm

Hydro boost was only on 1 tons, all diesels, and all GM's full size wagons. The brake booster uses the power steering pump for its boost instead of vacuum.

Title: Re: What is (Hydroboost)?
Post by: micahadams on April 11, 2010, 11:33:28 pm

Its the power assist for the brake. Instead of having vaccum(brake booster) it uses the power steering pump and fluid. Its factory on 1 tons and diesels

Title: Re: What is (Hydroboost)?
Post by: KY..Rob on April 12, 2010, 04:13:52 pm

Thanks Guy's, I guess i don't have to worry about that then :-X

Rob..

Title: Re: What is (Hydroboost)?
Post by: SUX2BU99 on April 14, 2010, 10:02:33 am

Why was Hydroboost necessary anyway? Was it the weight of the vehicle which made it require more power at the brake booster that regular engine vacuum could not produce?

Title: Re: What is (Hydroboost)?
Post by: VileZambonie on April 14, 2010, 10:08:03 am

Diesel Engines don't produce enough natural engine vacuum while the power steering system provides more than enough pressure. An artificial vacuum pump was used in some light duty applications either pulley driven or gear driven off of the cam. Heavy Duty braking systems worked well with hydroboost too so gas engines also got them. The problems with them are usually oil leaks, morning sickness or accumulator failure.