LUBRICATION GRT8100 SERVICE MANUAL
9-8
Published 3/26/2018, Control # 596-05
CYLINDER ROD SURFACE PROTECTION
Steel cylinder rods include a thin layer of chrome plating on
their surfaces to protect them from corroding. However,
chrome plating inherently has cracks in its structure which can
allow moisture to corrode the underlying steel. At typical
ambient temperatures, hydraulic oil is too thick to penetrate
these cracks. Normal machine operating temperatures will
allow hydraulic oil to warm sufficiently to penetrate these
cracks and if machines are operated daily, protect the rods.
Machines that are stored, transported, or used in a corrosive
environment (high moisture, rain, snow, or coastline
conditions) need to have the exposed rods protected more
frequently by applying a protectant. Unless the machine is
operated daily, exposed rod surfaces will corrode. Some
cylinders will have rods exposed even when completely
retracted. Assume all cylinders have exposed rods, as
corrosion on the end of the rod can ruin the cylinder.
It is recommended that all exposed cylinder rods be protected
using Boeshield® T-9 Premium Metal Protectant. Manitowoc
Crane Care has Boeshield® T-9 Premium Metal Protectant
available in 12 oz. aerosol cans by ordering part number
9999101803 through the Parts Department.
Cylinder operation and inclement weather will remove the
Boeshield® protectant; therefore, inspect machines once a
week and reapply Boeshield® to unprotected rods.
WIRE ROPE LUBRICATION
Wire rope is lubricated during manufacturing so that the
strands, and individual wires in strands, may move as the rope
moves and bends. A wire rope cannot be lubricated sufficiently
during manufacture to last its entire life. Therefore, new
lubricant must be added periodically throughout the life of a
rope to replace factory lubricant which is used or lost. For
more detailed information concerning the lubrication and
inspection of wire rope, refer to Wire Rope, page 1-30.
LUBRICATION POINTS
A regular frequency of lubrication must be established for all
lubrication points. Normally, this is based on component
operating time. The most efficient method of keeping track of
lube requirements is to maintain a job log indicating crane
usage. The log must use the engine hourmeter to ensure
coverage of lube points that will receive attention based on
their readings. Other lubrication requirements must be made
on a time basis, i.e. weekly, monthly, etc.
Check all oil levels with crane parked on a level surface in
transport position, while oil is cold, unless otherwise specified.
On plug type check points, oil levels are to be at the bottom
edge of the check port.
On all hoists with a check plug in the drum, the fill plug shall be
directly on top of the hoist, and check plug level.
All grease fittings are SAE STANDARD unless otherwise
indicated. Grease non-sealed fittings until grease is seen
extruding from the fitting. One ounce (28 grams) of EP-MPG
equals one pump on a standard 1 lb (0.45 kg) grease gun.
Overlubrication on non-sealed fittings will not harm fittings or
components, but underlubrication will definitely lead to a
shorter lifetime.
Unless otherwise indicated, items not equipped with grease
fittings, such as linkages, pins, levers, etc., should be
lubricated with oil once a week. Motor oil, applied sparingly,
will provide the necessary lubrication and help prevent the
formation of rust. An Anti-Seize compound may be used if rust
has not formed, otherwise the component must be cleaned
first.
Grease fittings that are worn and will not hold the grease gun,
or those that have a stuck check ball, must be replaced.
Where wear pads are used, cycle the components and
relubricate to ensure complete lubrication of the entire wear
area.
CraneLUBE
Manitowoc highly recommends use of CraneLUBE lubricants
to increase your crane’s reliability and performance. Contact
your Manitowoc distributor for information about the
Manitowoc’s CraneLUBE lubrication program.
Cummins Oil Registration List
Cummins has a program that lists engine oils that it has tested
to meet its engineering specifications. Listing of recommended
oils is on QuickServe® Online. Log on to
quickserve.cummins.com and login with a current user name
and password or create a new account by selecting “Create an
Account” under information, choose Limited Owners Plan and
register. Once logged in, click on the “Service” Tab in the top
red bar, “Service Tools” mini-tab and “Oil Registration Lists”
link within the Service Tools list. This will load a list of the
different Cummins Engineering Specification numbers. Select
the one that applies to your engine to view the registered oils.
Safety
To lubricate many locations, the engine must be started. After
positioning areas of the unit for lubrication, the engine must be
turned off and moved areas stable before approaching.
WARNING
Crushing Hazard!
Movement of the superstructure and the boom may
create a crushing and/or pinching hazard. Failure to
observe this warning could result in death or serious injury
if the message is ignored.
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