Potterton Medway Super, Инструкция по установке и обслуживанию

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6. REPLACEMENT OF PARTS – Page 14
e. Remove 2 screws above the chassis base securing the
governor to the automatic valve.
f. Remove 3 screws above the chassis base securing the
governor to the chassis base.
g. Carefully withdraw the governor complete with pressure
relief valve, TAKE CARE NOT TO BEND THE PUSH
ROD. IF THE ROD IS BENT, A NEW ONE MUST BE
FITTED.
NOTE: When removing the water governor, the
temperature selector spindle will disconnect itself from the
governor. On re-assembly the rod must be positioned before
the unit is secured in place.
h. Remove the push rod.
i. Remove 8 screws and separate the two halves of the
water governor.
Fig 26
DESCALE AND REGREASE
j Remove both the brass washer and ‘O’ ring from the top
opening. Clean the washer.
k Clean the top opening then pack with a silicone grease
such as Dow Corning 111. Fit a new ‘O’ ring and re-fit
the brass washer.
I. Hold the thrust plate, remove the fixing nut and lift out
the diaphragm assembly. Clean or renew as required.
On re-assembly, tighten the fixing nut finger tight plus a
¼ turn only.
m Check and if necessary replace the transfer port ‘O’ ring.
n Ensure the diaphragm assembly is correctly seated then
re-assemble the two halves of the governor. Insert the 8
screws and secure finger tight. Fully tighten all 8 screws
in the order shown.
o Clean, regrease and re-fit the push rod or replace with a
new one.
Fig 27
Fig 28