MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL
6-22 Published 3-22-2021, Control # 702-02
Item
Lube Point
Description
Figure No.
Approved
Lubricant
Approximate
Capacity
Service Interval
Service
Application
Axle Lubrication – Meritor Axles
30 Differentials Figure 6-8 B
40L
(10.6 gal) ea
NOTE 20.
NOTE 21.
NOTE 22.
NOTE 23.
Every 250 hours, or
1 month, whichever
interval comes first
CHECK and FILL
2 service points
Every 3000 hours, or
2 years, whichever
interval comes first
DRAIN and FILL
2 service points
CLEAN magnetic
drain plug
INSTALL magnetic
plug in drain port
31
Planetary Hubs &
Wheel Bearings
Figure 6-9
B
9.8 L
(10.4 qt) ea
Wheel End
NOTE 20.
NOTE 21.
NOTE 22.
Every 250 hours, or
1 month, whichever
interval comes first
CHECK and FILL
4 service points
See NOTE 23.
Side View,
Planetary DRAIN
and FILL ports
Figure 6-9
Every 3000 hours, or
2 years, whichever
interval comes first
DRAIN and FILL
4 service points
See NOTE 23.
NOTE 20: 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 21: 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 22: If the makeup amount of fluid is substantially more than 0.23 L (0.5 pt), CHECK for leaks.
NOTE 23: 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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