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Remember to have sufficient hydraulic oil in the priming pump to be able to prime the complete system without introducing air.

 
The bleeder at the top of the valve assembly, or valve block, will need to be loosed to expel the initial air from the priming hose and pump after the first several strokes. (FIG 12 and 14)

 
After all the air is expelled, then continue to operate the priming pump while observing accumulator capacity indicator as it retracts see (FIG 4a and 4b).
Also observe pressure gauge. Do not exceed 100 PSI (1 bar) (FIG 3)

WARNING: One more pump stroke could over- pressurise the system and cause damage to the accumulator and pressure gauge. BE VERY CAREFUL! 

Now proceed to bleed rams, (remember to have the accumulator pumped up to full before attempting to bleed each ram) (FIG 3).

Early type bleeders (plus those fitted on aluminium chassis) will need to be slacked off, and one side of the cap held down; a container should be placed under each end of the ram while bleeding. 
On later type bleeders the plugs need to be removed see (FIG 17).

FIG 17

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