Lull 644E-42 Operation Manual - Manual (Page 163)

General Maintenance
161 Model 644E Origin 3/04
F. Wear Pad Replacement (Boom)
(As Wear Pad Indicators Indicate)
Each boom wear pad (1) is manufactured with a convenient wear pad indicator. This
is the angled cut (2) at each end of all wear pads.
The total thickness (3) of a new wear pad (1) is .625" (16 mm). The angled cut (2)
will provide a total wear thickness (4) of .25" (6 mm) on load bearing pads or .18"
(4,6 mm) on the side non load bearing pads. This will leave approximately .375"
(10 mm) of total unused base material.
The pads must never be worn past the angled cut indicator because the metal pad
insert (5), that holds the pads in place, will begin to wear into the boom pad sliding
surfaces. If the pad wears past this point, the metal insert in the pad will begin to
gouge the boom plate surfaces. Contact your local Lull Distributor.
Replacement of boom wear pads must be performed by a Lull Distributor when the
wear pads indicate.
IMPORTANT! The boom has been factory lubricated for proper wear pad break-in
and will normally not require further lubrication. However, after replacing any wear
pad(s), or after prolonged periods of inoperation, light lubrication with ìLPS3î or
ìLUBRIPLATEî chain or cable fluid (or equivalent) of the boom wear surfaces is
recommended to keep the wear pads and the boom wear surfaces lubricated
properly. Light lubricating of the boom wear surfaces is also recommended in salt air
climates, after cleaning with pressure washer using solvents or when the vehicle is
to be put in storage, to prevent rusting.
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