MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL
6-36 Published 3-22-2021, Control # 702-02
Item
Lube Point
Description
Figure No.
Approved
Lubricant
Approximate
Capacity
Service Interval
Service
Application
Boom Lubrication (Continued)
80
Hook Block,
1 Sheave, Swivel
Bearing – 26MT
Figure 6-18 A
Use grease
fittings
provided
Apply until
grease
extrudes
Every 250 hours, or
3 months of service,
whichever interval
comes first
CHECK sheaves on
each of four (4)
hook blocks listed
CHECK sheaves
for dry points of
operation
CHECK sheaves
for grease leaks
GREASE swivel
bearing(s) at service
points, as shown
Each hook block
has 3 service points
The overhaul ball
and cylinder each
have 1 service point
See NOTE 42.
See NOTE 44.
81
Hook Block,
3 Sheave, Swivel
Bearing – 45MT
82
Hook Block,
5 Sheave, Swivel
Bearing – 75MT
83
Hook Block,
7 Sheave, Swivel
Bearing – 100MT
84
Overhaul
Ball/Cylinder
85
Telescopic
Slide Faces
Figure 6-19 M Brush on
Every 500 hours, or
6 months, whichever
interval comes first
BRUSH ON front
faces in a thin line
12 service points
See NOTE 42.
See NOTE 43.
NOTE 42: DO NOT USE non semi-synthetic lubricant. Use of non-approved lubricant may damage components.
NOTE 43: Extend boom for access to telescopic slide front faces that contact wear pads inside the boom. Follow the
Tele Section positioning and lubrication instruction given in the section titled READ FIRST! IMPORTANT
CRANE SET-UP INFORMATION!, page 6-33. If the weather is very bad or operating conditions are poor, then
more frequent intervals are necessary. Monitor the service points and adjust lubrication intervals, as necessary.
NOTE 44: Slowly turn the sheave, and examine it for rough or dry points of operation and grease leaks. If rough or dry
points of operation are found, then replace the sheave. If grease leaks are found, then replace the sheave.
CAUTION
Possible Equipment Damage!
Use specified semi-synthetic or synthetic lubricants as listed in this section of your GRT8120
Operator Manual. See also your GRT8120 Service Manual for maintenance and lubrication
instructions.
Use of non-approved, non semi-synthetic lubricant may damage components and/or
invalidate published lubricant intervals.
Failure to follow this instruction may cause damage to equipment.
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