Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

Hydraulic powerhead

August 10, 2023, 10:56:38 am

Anybody have or know of a hydraulic powerhead for a 1989 GV ORED
Originally Oshkosh part #111835C.
Freightliner also has two GM part numbers: #18006232 and 18004527.
Seems these brake boosters are no longer made or available.

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Re: Hydraulic powerhead

Reply #1 – August 11, 2023, 07:36:38 am

If those are NLA (no longer available) have you thought about using a rebuild service in your area? Working on old cars we run into this quite often so rebuilding is our best option at times.

Mike

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Re: Hydraulic powerhead

Reply #2 – August 11, 2023, 09:40:53 am

Yup. Just called Skarlupka Services, Inc near Antigo, WI. They worked on our coach a few years ago and did a great job and we were quite satisfied with the work and price.
For those who might be interested, they are specialists in the DD 8.2 V8 engines. Why, you ask? Because the potato farmers up here in Northern Wisconsin have quite a few of these Detroit Diesel engines running the irrigation equipment in the fields. Reliable as all get-out. And Dick Skarlupka, his son, and crew, work on these engines every year to maintain them and keep them operating.

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Re: Hydraulic powerhead

Reply #3 – August 31, 2023, 09:59:29 am

Well, here is an update on my brake situation:
Turns out the powerhead was just fine. My problem was the new master cylinder NOT getting brake fluid from the remote reservoir.
I purged the lines of air by using a small one gallon pressure tank, fresh brake fluid, and opening each bleeder in turn. Then I connected the two hoses coming from the reservoir and started threading the brake lines that go from the master cylinder to the small manifold. Once I got the fittings started I had the DW open the two fill caps on the reservoir. Brake fluid started leaking out the fittings until I tightened the fittings.
Then she put the caps back on and, will wonders never cease!!! We had brakes!!! All this after only installing and removing the master cylinder five (or six) times and finally discovering that the reservoir caps had to be loose or off.
I made a discovery that the master cylinder WITH the hose adapter is available on Amazon for around $405 but, I bought a master cylinder with the reservoir mounted on the master cylinder for about $100. Check the stamped number on the side of the master cylinder and use that to research for a new one. Just carefully swap the new reservoir for your old hose adapter. Use the new "special" O-rings that are on the bottom of the new reservoir.

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