MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL
6-46 Published 3-22-2021, Control # 702-02
Item
Lube Point
Description
Figure No.
Approved
Lubricant
Lube
Capacity
Lube Interval Application
Hydraulics Lubrication
114 Hydraulic Filter Figure 6-24 — —
REPLACE hydraulic
filter when restriction
indicator gauge on the
filter head shows red
REPLACE hydraulic
filter element
See NOTE 53.
See NOTE 56.
115
Hydraulic Tank
SIGHT GLASS
See NOTE 52.
Figure 6-24 J
926.5 L
(
192.6 gal)
Tank only
Every 10 hours of
service, or daily,
whichever interval
comes first
CHECK oil level
FILL hydraulic tank to
LEVEL in SIGHT
GLASS
116
Hydraulic Tank
BREATHER
PERFORM SERVICE
INSPECTION every
3 to 6 months
See NOTE 56.
PERFORM SERVICE
INSPECTION of oil,
filters, and breathers
See NOTE 54.
See NOTE 55.
SAMPLE hydraulic oil
every 3 to 6 months
SAMPLE hydraulic oil
NOTE 52: Check Hydraulic oil level using sight glass on tank with boom fully retracted and lowered, and all outrigger
cylinders retracted.
NOTE 53 REPLACE hydraulic filter element when the restriction indicator gauge on the filter head is in the red and oil is
at operating temperature.
NOTE 54: REPLACE hydraulic filter at first 50-hours of service and repeat after another 50-hours, for a total of
100 hours of service, thereafter, at normal intervals.
NOTE 55: Hydraulic oil MUST BE at operating temperature at hydraulic filter and tank inspection and service. Hydraulic oil
MUST be drained at a temperature of 65°C to 90°C (150°F to 200°F).
NOTE 56: Hydraulic oil SHALL MEET or EXCEED ISO 4406 class 17/14 cleanliness level (reference SAE J1165).
• Working in harsh environmental conditions can dramatically affect the performance and condition of hydraulic
oil, filters, and breathers. Therefore, specific intervals for servicing/changing hydraulic oil, filters, and
hydraulic tank breathers cannot be set. Thus, it is imperative for the continued satisfactory performance of
Grove cranes, that service inspections be performed on the basis of how and where each crane is used.
• Under normal operating conditions, Grove recommends that hydraulic oil, filters, and breathers be
serviced, and hydraulic oil sampled at least every 3 to 6 months. Service inspections should be for airborne
or ingested particles and water that deteriorates and contaminates the hydraulic oil. Contaminated hydraulic
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 contaminant content is high. If the filter by-pass indicator reaches
the red zone or indicates a by-pass condition, the hydraulic oil must be sampled. Perform service to make
sure that the hydraulic oil tank breather does not restrict air flow IN, or air flow OUT of the reservoir.
• FILL procedure for Hydraulic Tank operation below -9°C (+15°F):
a. DRAIN existing oil.
b. FILL tank with oil per 6829101559 and cycle all cylinders.
c. DRAIN oil.
d. FILL tank with oil per 6829101559.
• See also your GRT8120 Service Manual for further details on Hydraulic Oil Sampling Test. Should you have
any questions, please contact your local authorized Grove distributor.
To Next Page
Loading...
Need help?
General
