Global Machinery Company PCH37 - Manual (Page 9)

9
Installing the guide bar and chain
WARNING. The chain has sharp
edges. Use work gloves for safety.
1. Pull the front guard (9) towards
the rear of the saw until there
is a “click” to make sure that
the chain brake is released.
2. Remove the two chain drive
cover nuts (5) with the double
ended wrench (28) and
remove the chain drive cover (4).
3. Remove the spacer (26) and discard.
4. Fully loosen the chain tensioning screw (3).
5. Place the guide bar (1) in
position over the two threaded
studs with the chain tensioning
pin (27), in the hole in the
guide bar.
6. Place the chain (2) around the
drive sprocket wheel (25) with
the chain links in the direction
shown on the bar and fit the
chain around the guide bar.
7. Fit the chain drive cover
and fasten the two nuts (5),
finger tight.
8. With the guide bar pointing upwards, tighten the chain
tensioner screw (3) until the links of the chain just touch
the bottom edge of the guide bar.
9. With the guide bar pointing
upwards, tighten drive nuts.
10. Check that the chain can be
smoothly pulled around the
guide bar by hand and that
it maintains contact with the
guide bar, top and bottom.
To check tension, rotate the
chain to its tightest condition
then suspend a 0.9kg weight
from the chain at the mid
point of the underside of the
bar. The maximum distance
between the driving links and
the bar should be 6.5mm.
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