Tuesday 17th April.
Following yesterdays work (see below) further attention today was focused on transmission "B" end faults and wiring.
Firstly, air, it was found that "B" end would not reverse, so a test rig was made to test the reverser mechanism from the shed supply. This was successful and the fault traced to the new solonoid valves. A quick check and change of wires found the valves now dumpin air from say reverse whn forward selected, so that the piston in the reverser was not being "held on". That fixed the transmission reverses ok. Next came some more wiring with ensuring connections and interlocks again proved correct.
The control pistons were checked on "B" end after yesterdays lack of power, the primary control piston was slow, it was removed and cleaned, now "B" takes power.
With reversing, power and electrics ok it was felt a test run was in order! so for the first time in 3 years D1010 moved out of the shed, onto the "mainline" and ran round the station on both engines and transmission with no faults being apparent in either "A" or "B" end.
Further tiding up was completed and covers put back on. In addition "B" can Feed air cut-off valve changed, new "O" rings at "A" end straight air brake valve. Several covers refitted.
Next job is the task of renewing the 2" vac pipe at "A" end under the cab floor, this is being made locally and hopefully will be refitted shortly ready for a vacuum brake test - the above test run being done in air passenger.
On a hot but quiet day at Williton, Geoff, Julien and Bob decended onto D1010 to progress the on going fault diagnosis. At the weekend a "fly" cable had been added at "B" end to get D1010 to power, this by-passed several important relays and therefore could not be left on, the fault had to be found and cured. It is pleasing to report that with D1010 running yet again fault diagnosis was successful and a wrongly wired cable in the transmission terminal box was found after checking the reverse directional interlocks.Once this was swapped, the "fly" cable removed and the transmissions both worked and indicated in the correct froward/reverse direction.
Progress now to tomorrow (Tuesday) when again D1010 will be run up and test pipes added to air and hydraulic circuits.