This thread sliped past me back in April
.
Good you got her fixed.
I had a problem with our new 240. the trip would get to 10.9 and would stop. then 3 months later the odometer quit on the way to the GTG
. the spedo worked fine.
I have read the Diesel Giant fix a few times, and have a PNP spedo out of a 79 300TD that I have taken apart, but didn`t get into pulling the shaft and number wheels out.
So now I have to finally fix one. the 80 240 has the 85 mph spedo, and I up graded to a 100mph spedo from PNP. well this one slips too.
Pop off the needle, remove the 2 screws on the face, and lift it off. remove the 2 screws in the back side and lift off the metal housing.
If you want to go deeper, there are 2 more screws. remove them and lift off the final part, and you will see the magnet that rotates in the cup that drives the needle.
The shaft with the brass gear that all the number wheels hang on, has a bushing on the end. I poped it off with a set of dykes, don`t squeeze the shaft, but close enough to fit under the bushing and then pry down it it will fly off
.
I was in the laundry room doing this on the dryier laying on a towel. bushing flew down behind the water heater
, now Iam crawling through the daddy long leg spider webs, dust lint and mouse turds. but finally found it
.
I placed a piece of tape on the numbers like DG did, then pulled out the brass gear and shaft. idea of tape is so they don`t get turned and screw up the milage. gave me trouble getting it out as a unit, so removed tape and removed ea wheel and placed in a line on the towel.
used a 6" needle nose Vice grip to put ridges in the shaft for the pot metal gear to grip onto. also the VG is the same width as the gear.
then slide in the shaft, place the pot metal gear on.
there are 6 grey cogs on a seperate shaft. slide one against the PMG, then slide on the wheel with the white gear, then a grey cog, the next wheel/cog etc...
Also as the wheels are being placed, be sure to line up your correct milage.
when the last wheel is on and the shaft is through the frame, then push on the brass bushing. I set the brass gear end on something solid, and used a hammer to tap it on. be careful not to send her home against the frame or the shaft might bind.
I added the Super Glue to the PMG/shaft, and kept the assembly tipped towards the brass gear. didn`t want the glue to run down the wrong way. even then had to turn the shaft, noticed the glue was making the shaft stiff as it dried. but turning it kept it free. maybe don`t really need it.
Then it is just a matter of putting it all back together.
NOTE: it might be a good idea to lift the needle over the pin it rest against. make a mark on the edge of the face as a reference point when replacing the needle, or the needle will read fast or too slow.
Hope this helps.
Charlie