IH: Oiling & Lubrication - Sub-04B

Article by sifty of the XLFORUM ¹⁾

The oil return fitting is on top of the case beside the vent, not in front of the pump.
So there's no easy way to route the lines toward the front for a filter.
The return needs to run down and forward to the oil filter and back to the tank.
(in addition to the vent line and the oil feed to the pump)

The oil tank mounting bracket has a large grommet in it.
The hole was enlarged to help cut down kinks while passing 3 lines through it.
The hole was filed out to a rounded rectangular shape and a large round grommet was cut down fit the new hole.

Because of tight space, short sections of copper tubing were used in place of thick rubber hose.
A short piece of rubber was placed at each end of the copper lines.
The ID of the copper tubing is slightly smaller than the desired 3/8” so it isn’t ideal.
But it avoids any 'squishing' of the rubber lines.
And is probably still may be better than the 90 degree elbow joint at the output connection.

The copper is refrigeration tube which is soft drawn and in a coil and doesn't need annealing.
Copper work-hardens easily however.
A tubing bender was used for the bends in small increments with care not to make too tight a bend.
The only problems were with double bends that the former couldn't get around.
The tube tended to flatten out or kink when trying to bend by hand.