Oil Priming and Fuel Uplift pump overhauls, Chris Baily
A while ago I agreed with Matt Lindley to overhaul some motors for the D1041 project. The first ones he asked to be done were the Oil Priming Pump from B end and the Fuel Lift Pump which serves A End power unit. Both were transported back to my premises, then over the course of two weeks, and a total of 24hrs total work, they were refurbished, tested and then returned to Bury ready to refit to D1041.
|Motors with Pumps and Mountings removed||Pumps in the parts washer for crud removal|
Both machines were stripped at the same time, in the following manner:
• Pumps removed from each motor, then the pumps de-greased
• Motor covers removed
• Mounting adapters removed and de-greased
• Brushes removed
• Fan end covers removed
• Armatures removed
With both motors now reduced to their component parts, a thorough inspection could be made. The fuel lift pump was particularly dirty and greasy inside, and the electrical readings for it were quite low.
|Both motors stripped down before internal cleaning||Close up of cleaned commutator|
Both field casings were washed out with solvents, then heat applied to dry them out. The armatures were also given a clean with solvents then the commutators gently cleaned up with light grade emery cloth.
Then, with everything dried and the commutators masked off, a coat of anti-tracking varnish was applied to the armatures, fields and end covers. Once dry, the masking was removed and both armatures were re-fitted. Finally, the fan end covers were re-fitted and bolted up.
|Armatures after coat of anti-tracking varnish||.. and the Field casings after varnishing|
All of the old paint on the motor casings and mounting stands was then removed with a wire wheel on a drill and needle gun in hard to reach places then treated with a coat of anti-corrosive primer and finished in silver.
Once dry the brushes were refitted, and temporary wires fitted to test the motors from a battery supply for 10 minutes each.
|View inside a rebuilt motor before external work||Motor casing and stand stripped to bare metal|
The pumps and covers were needle gunned to remove all old paint then these were also treated with anti-corrosive primer and finished in silver. Once dry the pumps were refitted and patch painting done to complete them.
|Pumps cleaned and bare of paint||Motor and stand after a coat of primer|
|Motor, stand and Pump in Silver||Job Done .. Both motors with pumps refitted after testing|
The previous report (30/09/2011) can be viewed here
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