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7 4-monthly maintenance jobs HS Preventive Maintenance 01/2006 US E dition 50 7

HS Preventive Maintenance 7 4-monthly maintenance jobs

01/2006 US Edition

Star / distributor plate 7

a Wipe the star and the distributor plate with a lint-free cloth.

On older heads, the distributor plate is not yet glued in place. Remove it, dust it off and clean the

seat for the distributor plate. 7

: Apply a light film of ISOFLEX TOPAS NCA 52 grease to the running surface of the star brake.

Remove any visible excess grease.

Make sure that no dirt or grease gets into the vacuum channels. 7

Segments 7

When cleaning the segments, be careful not to pull out or damage the sleeve retaining springs.7

s Carefully clean the segments using a cottonwool bud moistened with ethyl alcohol.

d Remove any visible dirt around the segments.

Valve casing 7

: Remove the valve plungers.

f Clean the valve casing using a cottonwool bud moistened with ethyl alcohol.

: Then clean all around the valve casings.

Assembling the front part 7

: Insert cleaned or new sleeves into the segments.

: Insert cleaned or new valve plungers into the valve casings.

7 4-monthly maintenance jobs HS Preventive Maintenance

01/2006 US Edition

HS Preventive Maintenance 7 4-monthly maintenance jobs

01/2006 US Edition

Distributor (back part of head) 7

a Carefully remove the distributor together with the two O-rings.

s Carefully remove the two O-rings.

: Clean them and grease them very sparingly with UNISILKON L250L.

: Check the distributor for damage. The running surface should be smooth and not grooved at

all.

Replace the distributor if it is damaged (see servicing instructions).

: Wipe the distributor using a lint-free cloth moistened with ethyl alcohol.

: Blow through with compressed air.

d Check that the gold spring pins (ball catches) move easily.

Replace the entire distributor if any of the ball catches does not move easily.

f Place the clean distributor and the lightly greased O-rings on a clean surface.