GreenWorks CU800 - Adjustable Wrenches; Socket Wrenches, Ratchets and Handles

GENERAL INFORMATION CU800 Service Manual
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fastener at only two points and is subject to slipping if under heavy force, or if the tool or fastener is
worn. A box-end wrench is preferred in most instances, especially when braking loose and applying
the final tightness to a fastener.
The combination wrench has a box-end on one end and an open-end on one end and an open-
end on the other. This combination makes it a convenient tool.
Another way to prevent cam out and to increase the grip of a Phillips screwdriver is to apply valve
grinding compound or permute screw and socket gripper onto the screwdriver tip. After loosening/
tightening the screw, clean the screw recess to prevent engine oil contamination.
1.8.3 Adjustable Wrenches
An adjustable wrench or Crescent wrench
(Figure 6) can fit nearly any nut or bolt head that
has clear access around its entire perimeter. An
adjustable wrench is best used as a backup wrench
to keep a large nut or bolt from turning while the
other end is being loosened or tightened with a box-
end or socket wrench.
Adjustable wrenches contact the fastener at
only two points, which makes them more subject to
slipping off the fastener. Because one jaw is
adjustable and may become loose, this shortcoming
is aggravated. Make certain the solid jaw is the one
transmitting the force.
1.8.4 Socket Wrenches, Ratchets and Handles
Sockets that attach to a ratchet handle (Figure
7) are available with 6-point or 12-point openings
(Figure 8) and different drive sizes. The drive size
indicates the size of the square hole that accepts
the ratchet handle. The number stamped on the
socket is the size of the work area and must the
fastener head.
As with wrenches. a 6-point provides superior-
holding ability. While a 12-point socket needs to be
moved only half as for to reposition it on the
fastener.
Sockets are designated for either hand or
impact use. Impact sockets are made of thicker
material for more durability. Compare the size and
wall thickness of a 19-mmhand socket (A, Figure 9)
and the 19-mm impact socket (B). Use impact
sockets when using an impact driver or air tools.