5
Pump Body
Each pump contains:
1 plunger (complete with integral non return valve)
1 plunger height adjustment screw
1 plunger return spring
1 grease outlet non-return valve
1 bleed screw
1 delivery hose outlet pipe
1 pump support bracket.
The grease is delivered from the reservoir via the feed hose / ”T” piece and fills
each pump primary chamber of the pump unit. When the system is primed the
grease then fills the secondary chamber via the plunger integral non-return valve.
Once the plungers are depressed by the train wheels, (or manually) the grease is
transferred via the outlet non-return valve to the outlet pipe and then through to
the delivery hoses.
On the return stroke of the plunger its integral non-return valve opens and allows
grease to flow into the secondary chamber from the primary chamber.
Plunger Height
Adjustment
Screw
A special locking screw operated with a 2.5mm Allen key that is adjusted from the
top of each pump body to adjust the height of the plunger. A pressure pad
operates on the side of the adjuster screw.
The higher the plunger in relation to the top of the rail the greater the grease
output
Plunger Return
Spring
There is one plunger return spring in each pump body.
The springs return the plungers to its static position after the plunger has been
depressed by the train wheel (or manually).
Grease Outlet
non-Return
Valve
There is one grease outlet non-return valve, in each pump body. The non-return
valve acts as a stop valve, preventing the grease in the Blade path from being
drawn back into the pump body as the plunger rises.
Once the plunger is depressed by the train wheel, (or manually), the grease is
transferred from the secondary chamber through the outlet non-return valve,
permitting grease to flow through to the Blade via the delivery hoses.
Bleed Screw
There is one bleed screw on each pump body.
Once open any air trapped in the secondary chamber, is able to be released when
the plunger is operated or fully raised.