I ahve a 1989 sanderson 725 teleporter and am having difficulty setting up the brake cylinders. There is two one abouve the other that are attached to a pivot system. But I cannot seem to get them set so that both rods push fully into the cylinders. I dont know whether one rod wants to be longer than the other. Any ideas appreciated.

Low brake pedal almost always indicates a compromised hydraulic system. Check you brake fluid level. If it is ok and you haven't had anything replaced in the brake hydraulics system lately, such as a wheel cylinder or brake caliper, then the primary suspect is the master cylinder.

There are a number of solutions here

https://www.google.com/search?q=Sanderson+teleporter+won%27t+go+in+forward

..

Check the brake light switch above the brake pedal with a volt meter, when the pedal is pushed you should have 12 volts in and out.

you should be able to add fluid by unscrewing to top of the master cylinder. Check for leaks around the brake lines and calipers, or a leak at the master cylinder(where you check the fluid). If a leak is found you will have to repair it. the rubber brake lines in the wheel wells are susceptible to cracking. then you will have to bleed the brake system with new fluid. I would recommend having a professional do it for you.

Most carb. engines should idle between 725 and 750 R.P.M., lower the idle and be sure to check the timing. You should have an emissions label under the hood to explain the idle and timing.

You have to Remove the brake lines going to the cylinder, then remove the 2 nuts holding it to the brake booster.

Make sure u bench bleed the new master before you install, the new one should come with a bench bleed kit, u must attach the 2 hoses to both ports on the master cylinder where the brake lines connect to, then run the 2 hoses into the top of the reservor and fill it with fluid, use a screw driver and pump the master cylinder until you can see no air bubbles running through the hoses

Perkins is a hard engine to prime. Fill the fuel filter with clean diesel, there should be a hand pump on the left side(looking at the front of the vehicle) . There should be a bleed screw on top of the filter housing. Loosen the bleed srew and pump the hand pump untill you get a steady stream of fuel from it. Tighten the bleed screw. Loosen the injector bonnet nuts approximately 1 1/2 turns on all of the injectors. Turn the engine over until you see a steady stream of fuel from the the injector bonnets. Tighten the bonnet nuts, pump the handpump approx 10 times and start the engine. Give it half throttle until it stops stumbling and all of the air is worked out of the system.

under you hood,looking towards the windshield the clutch reservoir is on the right side of the brake master cylinder,

change dump valve under master cylinder