Chris' 79 Hz tonner

[chris r]

The brakes have always been a bit touchy and grabby when cold as long as I've had the tonner. I've rekitted the front calipers, replaced all the hoses and had master re sealed.

I had another look at the drums as it wasn't raining or dark 

Glad I ordered new shoes 

 

The adjuster has done its dash. A couple of teeth have gone off to retirement and a lot more are mushed together 

Splashed out and ordered new adjusters along with a spring kit, seeing as it will all be apart may as well replace nearly everything.

Back into speedo schenanagins. 

I bought a little programmable thingy for the speedo controller which is still plan A (ish) 

It'll need a digital signal in and I'll have to sort out a hall sensor to make it a cleaner install. 

So plan b side quest is some period correct (for when tonner was new) electronic barrying. I'll use the existing sprinter inductive pickup in the gearbag and use a LM2917 frequency to voltage converter. There are a few circuit options and in should be able to get a square wave out. If I get really keen might be able to get a pwm signal out of it and feed it to the motor control board. 

Almost guaranteed it won't be anywhere close to the correct rpm for the speedo to read close to accurately but it's a fun side quest. 

[chris r]

Spring kit and adjusters were waiting for me when I got home 

Disassembled everything and insalled new genuine gm backing plate and hub in a can

New wheel cylinders ready to go 

New adjusters with letters for each side which is nice 

Not pictured was the battle with the new green spring,only to realise I fitted the old trailing shoe on the front. 

Spend ages fighting the new green retaining springs into position with correct new shoe 

Fought the other one and ended up reusing the original springs as the new ones are clocked 90 deg different (and one went ping and  went into orbit) 

All reassembled 

Will attack the other side later when I won't get rained on

 

 

[chris r]

Other side went way quicker when I reused some original springs 

New springs are clocked 90 deg different so don't fit in the same place as the originals did 

Same thing but quicker this time as the cylinder only gushed after I fondled it's nipple and gave it a wiggle. 

Same quick backing plate in a can as yesterday. Yes it'd be better to wire brush and paint it correctly. I am doing this on the lawn and it's survived 47 years like this so it'll survive a few more. It's also progress vs more fucking around on side quests 

The pins? From the wheel cylinder to the shoes needed a quick (emphasis on the quick) clean up 

And into the atmospherically controlled paint booth 

One side on 

Everything together again 

New adjuster. The old one was as mangled as the left hand side and also siezed 

Really pushed the boat out and got some new wheel nuts as the original nuts have had one too many ugga dugga and weren't the best condition 

Have to put the hub caps on as people might think I'm made of money seeing the gold zinc wheel nuts.

That's enough productivity for today. Will adjust them out and bleed them another day 

[chris r]

I was getting mad at the new adjusters not turning and blaming them for my incompetence. 

Turns out the picture I had with coloured springs was wrong.

I had the springs on the wrong side and they were locking the adjusters in place 

Swapped them and strangely enough they work. Quick adjustment and test drive and the catchy/grabby bullshit seems to be gone which is good. Will see how it goes. 

I've lost the plastic trim clips so chucked rivnuts in place of them 

Couple of M5 screws and washers and the trim piece is back on 

Dropped it off for a wof. Fingers crossed it passes 

[chris r]

Brakes passed wof which is good. 

Both outer tierod ends and a inner control arm bush need replacing. I'll order them once they arrive I'll cheat and get mechanic to fit as I'm not keen on rolling in the mud to change them 

[chris r]

Turns out everything I ordered listed for Hz doesn't fit. Tierod ends don't fit and bushes too small diameter and too short. 

One ton stuff must be more heavy duty. Mechanic is trying to source stuff through their suppliers and I've talked to the place I got my parts from and am waiting for a call back