MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL
6-24 Published 3-22-2021, Control # 702-02
Item
Lube Point
Description
Figure No.
Approved
Lubricant
Approximate
Capacity
Service Interval
Service
Application
Axle Lubrication – Kessler Axles
32 Differentials Figure 6-10 B
37L
(9.8 gal) ea
NOTE 25.
NOTE 26.
NOTE 27.
Every 100 hours, or
1 month, whichever
interval comes first
CHECK and FILL
2 service points
PERFORM after first
100 hours of service
REPEAT every
1000 hours of
service, or 1 year,
thereafter, whichever
interval comes first
DRAIN and FILL
2 service points
CLEAN magnetic
drain plug
INSTALL magnetic
plug in drain port
33
Planetary Hubs &
Wheel Bearings
Figure 6-10
B
2.8 L
(2.9 qt) ea
Wheel End
NOTE 25.
NOTE 26.
NOTE 27.
Every 250 hours, or
1 month, whichever
interval comes first
CHECK and FILL
4 service points
See NOTE 24.
Detail View,
Planetary DRAIN
and FILL ports
Figure 6-10
Every 3000 hours, or
2 years, whichever
interval comes first
DRAIN and FILL
4 service points
See NOTE 24.
NOTE 24: Planetary Hubs and Wheel Bearings must be filled to oil fill level indicated on axle hub. To provide sufficient
lubrication, final fluid level MUST BE LEVEL with the filler plug hole at the Wheel End, with fluid even slightly
dripping from the hole. CLEAN magnetic plug, then INSTALL magnetic plug in drain port.
NOTE 25: Before operating crane in cold weather (arctic) ambient temperatures below -9°C (+15°F), Standard bearing
lubricant must be fully purged and replaced with Cold Weather lubricant meeting Grove U.S. L.L.C.
specifications as shown in Table 6-4: Approved Lubricant Reference Table, page 6-11 in this Operator Manual.
See also your GRT8120 Service Manual for maintenance and lubrication instructions.
NOTE 26: If the makeup amount of fluid is substantially more than 0.23 L (0.5 pt), CHECK for leaks.
NOTE 27: DO NOT USE non semi-synthetic lubricant. Use of non-approved lubricant may damage components.
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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