GMC brake booster output stroke measurements

 Original motorhome booster, a "metric" replacement and Hydroboost. These are output rod strokes.

I used these straps and a rod to hold the input rods all the way in.

Galaxy S4 screen replacement

Samsung phone fix. We found very good instructions on youtube here
https://www.youtube.com/watch?v=KyC8ctDFhg8

Master cylinder shootout

Airboat rudder fix

 Airboat rudder with a bent and cracked control tab attachment

 After straightening we ground out both sides of the crack with a rotary file

 Tig with 4043 rod

Coolant pump impeller R&R

The GMC came with a cast 4.25" water pump impeller. This can be swapped to a replacement water pump. Replacements mostly have a stamped open back impeller of a smaller diameter.

       

 Original 4.25" cast impeller compared to the generic 3.875" impeller

I set the clearance .015" minimum. Using a pump affinity calculator like-

https://en.wikipedia.org/wiki/Affinity_laws


Changing only the impeller diameter makes around a 12% difference in pressure.

              Jacket water pressure at road speed with OEM 4.25" impeller

Alaska

Destruction Bay

                                                 Watson Lake

                                  Alaska Highway

                                       By Watson lake...We picked up a mouse hitch hiker ha

                             Turn again bay

                                     Seward

 Taylor Highway

               Speedo gear gave out but I had a new one!

   Cruise control gave out in multiple ways... Foam filter deteriorated enough that the solenoid couldn't pull in, removed. Minimum speed switch went erratic so it got jumpered with a paper clip at the transducer. Stalk switch went out so it was replaced with a door bell button for engage and jumpered the hold part to always be on. Still turns off with the brake pedal. Love my auto throttle.

   Glacier by Denali

   On the way to Homer spit

        Fish at homer spit

     On the way to Stewart

   Fellow GMC at Stewart...This coach was Darren Paget's who did stainless countertops

 

Norm Alinson present owner

 

Ferry to Dawson

                                         Dawson

 

Dawson

 

Attempted window repair  from rocks thrown by a nine axle truck. The window later cracked big and needed replaced

 

Lost a headlight too

 

Talkeetna

Took a flight around Denali from K2

 

Around Denali

                                      

 

Transportation museum Whitehorse

 

Richardson Highway

 

Glacier view camp

                                             Hyder

                      Tunnel to Whittier, share with train and one way traffic

 

Going in

Ancient DuoTherm heat strip and dehumidify mod

Wanting some method of dehumidifying our GMC living area when it is cooler than what would require the aircon compressor to stay running I came up with this mod. The heat strip installed is not listed for our aircon but it can be made to fit. The plan was to use the original thermostat to control the heat element with an inverting relay.  A side benefit would be the option to use it for dehumidifying by alternating the compressor and heat.

Not listed to fit our aircon but it will by drilling a couple holes. All of this can be done from the bottom no need to go on the roof.

                                            Duotherm circa 1975

      Element installed, two holes need drilled and some trimming on the screen

 Grainger 5Z484 relay with pigtails soldered on 120vac coil 15 amp SPDT. Any like rated relay would work. This was Ebay 10$ and will fit in the electrical box.

                                  Relay out of focus and in the box

       Paper pattern of the proposed switch box

             Aluminum cut and ready to fold up for the real box

                                      Folded up ready to install

                                                    Installed switch box.
Operation is cool on heat off - just cools, heat on cool off -just heats, Cool and heat both on - compressor and heat alternate on the thermostat thus dehumidifying. We like it.