Dennis Number 2 Pump

Apart from the routine maintainance of greasing the bearings and the priming pumps, it is also necessary to grease the valve gear when the operation becomes stiff.

Priming Pump Valve

This four-position valve is of a very simple design, a taper fit drilled in three places to give its functionality.

To lubricate:

  1. Slacken the locking ring (one closest to the pump body).
  2. Slacken the inner threaded portion and remove the assembly.
  3. Clean the taper fit.
  4. Lubricate with an insoluble grease (e.g. LM)
  5. Reassemble, tightening the assembly enough for the gland not to leak, but such that the valve rotates easily. If this is not possible the gland will need replacing.

Dennis Number 3 Pump

Apart from the routine maintainance of greasing the bearings and the priming pumps, it is also necessary to grease the valve gear when the operation becomes stiff.

Priming Pump Valve

This four-position valve is of a very simple design, a taper fit drilled in three places to give its functionality.

To lubricate:

  1. Slacken the locking ring (one closest to the pump body).
  2. Slacken the inner threaded portion and remove the assembly.
  3. Clean the taper fit.
  4. Lubricate with an insoluble grease (e.g. LM)
  5. Reassemble, tightening the assembly enough for the gland not to leak, but such that the valve rotates easily. If this is not possible the gland will need replacing.