Service - 126 JT520 Operator’s Manual
50 Hour
CMW
50 Hour
Drilling Unit
Change Engine Oil and Filter (Initial
Service)
Change engine oil and filter after 50 hours. Drain oil
(3), change filter (4), and add 4.2 qt (4 L) of DEO at
fill (2).
Location Task Notes
DRILLING
UNIT
Change engine oil and filter Initial service, DEO
Change drilling fluid pump oil (initial) EO
Check radiator
Change hydraulic filter Initial service
Check rotation gearbox oil level 2 gearboxes, MPL
Check battery
Change fuel filter Initial service
Check and adjust fan belt tension
IMPORTANT: Use oil specified in temperature
chart found in “Recommended Lubricants/
Service Key” on page 120.
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