LUBRICATION AND MAINTENANCE GRT655/655L OPERATOR MANUAL
6-30 Published 3-23-2020, Control # 654-04
Item
Lube Point
Description
Figure No.
Approved
Lubricant
Lube
Capacity
Lube Interval Application
Hydraulic
110
Hydraulic Tank
(Tank Only)
Figure 6-15 J
469.7 L
(124.1 gal)
Check fluid level every
10 hours or daily.
• Use sight gauge on
side of tank, with
boom fully lowered
and all outrigger
cylinders retracted.
• Drain and refill as
necessary
NOTE:
• Environmental and other conditions can dramatically affect the condition of hydraulic oil and filters. Therefore,
specific intervals for servicing/changing hydraulic oil, filters and hydraulic tank breathers cannot be set.
However, it is imperative for the continued satisfactory performance of Grove cranes that inspections be
performed on the basis of how and where each crane is used. Airborne and ingested contaminants can
significantly reduce the life of oil and condition of hydraulic oil filters and tank breathers.
• Under normal operating conditions, it is recommended that hydraulic oil, filters and breathers be inspected
and oils sampled at least every 3 to 6 months and more frequently for severe operating conditions.
Inspections should be for airborne and/or ingested particles and water that deteriorate and contaminate the
oil (e.g., oil appears “milky” or no longer has a transparent clear to amber color). The return filter by-pass
indicator should be observed daily to determine if the contaminants content may be high. If indicator reaches
red zone or indicates a by-pass condition, hydraulic oil must be sampled. The hydraulic tank breather should
also be inspected to ensure it does not restrict air flow in and out of the reservoir.
• To inspect hydraulic oil, fill a small glass container with a sample of reservoir oil and another glass container
with fresh oil. Let samples stand undisturbed for one to two hours, then compare the samples. If reservoir oil
is heavily contaminated with water, the sample will appear “milky” with only a small layer of transparent oil on
top. If the “milky” appearance was due to air foaming, it will dissipate and the oil should closely match the
fresh oil. Should you have any questions, please contact your local authorized Grove distributor.
• Hydraulic oil shall meet or exceed ISO 4406 class 17/14 cleanliness level.
111 Hydraulic Filter Figure 6-15 --- ---
Change filter element
when indicator is red.
Replace breather when
filter is replaced.
Oil must be at operating
temperature.
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