NATIONAL CRANE Published 9-26-2018 Control # 646-02 5-7
NTC55 OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS
Internal Cable Sheave Lubrication
A grease gun adapter is required to lubricate the internal
sheaves. The required needle grease gun fitting is:
• A 0.25 in (6.35 mm) diameter nozzle grease gun tip
(National P/N 955045).
• Contact Manitowoc Crane Care to obtain this tip.
Lubrication of the extend and retract sheaves is as follows:
1. Locate the fittings as listed in the table above.
2. Lubricate the sheave pins until a small amount of grease
extrudes from the sheave pin.
Side and Bottom Boom Wear Pad
Lubrication
Recommended lubricant is EP-3MG grease.
1. Fully extend and set the outriggers.
2. Lower the boom to horizontal.
3. 102 ft boom - Fully extend the boom and apply grease to
the side and bottom of the 2
nd
,
3
rd
, and 4
th
sections with
a brush.
128 ft boom - Extend the boom 97 ft and apply grease to
the side and bottom of the Tele 2,
Tele 3, Tele 4, and Tele
5 sections with a brush.
4. Raise the boom to 75° and retract the boom.
5. Extend and retract the boom several times until the
grease is evenly spread.
6. Repeat as necessary.
Outrigger Beam Lubrication
Recommended lubricant is EP-3MG grease.
1. Fully extend and set the outriggers. Refer to
(Figure 5-2.)
2. Apply grease to all wear pads and contact surfaces at
the side and bottom of all beam sections and lower
surface of the stabilizer/jacks with a suitable brush or
putty knife.
3. Extend and retract the outriggers several times until the
grease is evenly spread.
4. Repeat as necessary.
Hoist Brake Oil
Check Hoist Brake Oil
To check the hoist brake oil, remove the inspection plug (2,
Figure 5-3) and visually inspect the oil level. The fluid should
be level with the bottom of the inspection hole. If more fluid is
needed, add through the brake oil vent and fill plug hole until
oil is at the bottom level of the inspection hole (1).
Drain /Add New Hoist Brake Oil
To drain and add new oil, remove the drain plug (3,
Figure 5-3), inspection plug (2) and vent plug (1) and drain
the hydraulic oil. Reinstall drain plug (3) and add fluid at the
inspection hole (2), until oil is at the bottom level of the
inspection hole. Install the inspection plug and the oil vent (1)
and the inspection plug (2). See Lubrication Points, page 5-
3. The hoist brake fill capacity is 0.23 liter (.25 quart).
NOTE: Hoist brake lubricants are satisfactory for operation
in temperatures from -23° C to 66° C
(-10° F to +150° F). For operation outside this
range, contact Manitowoc Crane Care for
recommendations.
DANGER
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
DANGER
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
DANGER
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
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