JLG 1350SJP Service Manual - Manual (Page 363)

SECTION 5 - HYDRAULICS
3121142 – JLG Lift – 5-39
g. Under application conditions with a heavy occur-
rence of dust or severe temperature fluctuations,
the intervals between fluid maintenance should be
shortened accordingly.
PRACTICAL EXPERIENCE SHOWS THAT MOST FLUID MAINTENANCE ERRORS
OCCUR DURING AN OIL CHANGE DUE TO:
• USE OF AN UNSUITABLE HYDRAULIC FLUID
• USE OF OIL CONTAMINATED DUE TO POOR STORAGE PRACTICES
• FAILURE TO CLEAN THE RESERVOIR
• INADEQUATE CLEANLINESS WHEN FILLING THE RESERVOIR (DIRTY
DRUMS, CONTAINERS, WATER, ETC)
3. Leakage Inspection
a. After commissioning
b. The complete transmission drive system (pumps,
motors, hosing, filters, valves, etc) should be
checked for leakage at regular intervals.
c. Leaking joints & connections must only be tight-
ened when pressureless.
4. Cleanliness Inspection
a. The oil tank breather should be regularly cleaned of
dirt and dust to prevent clogging. With each cylin-
der movement, gallons of oil pumped, an equal
amount of air exchange occurs across the reservoir
breather. A dirty or clogged breather will affect all
machine functions!
b. The air/oil cooler surfaces and engine radiator
should be cleaned at the same time.
c. If hose connections are disassembled, it is impera-
tive that the utmost care be taken that no foreign
bodies infiltrate the oil circuit. Catastrophic compo-
nent failure may occur.
5. Oil Level Inspection
a. Inspect oil level in the reservoir daily.
b. If "topping off" is required, use only the same Mobil-
fluid #424, Product #52233-4.
c. Do Not Mix Fluids.
6. Hydraulic Fluid - The "Life Blood" of the Machine
a. The type of hydraulic fluid supplied in the machine
from the factory was selected after extensive testing
and development. The fluid was selected to perform
under "most" applications and conditions. Should
this machine be in service for extended time peri-
ods at the extremes (hot or cold), JLG should be con-
sulted for assistance in selection of the most
suitable fluid type and grade for your application.
b. When operating at temperatures below 0
o
F, allow a
warm-up period, if at all possible, to a temperature
of 40
o
F.
c. When beginning motion of a "cold" machine, oper-
ate all functions at reduced speeds until the "cold"
oil has circulated out of the drive loop.