ENGINE SERVICE (Contd)
Engine Crankcase Oil Level.
Never operate engine in M939/A1 series vehicles with oil level below L (low) level mark or above H
(high) level mark.
Never operate engine in M939A2 series vehicles below ADD 2 QTS (low) mark or above FULL (high)
mark on dipstick.
Engine oil level dipstick (4) is located on right side of engine below coolant surge tank (1) on M939/A1
series vehicles, and behind alternator (2) on M939A2 series vehicles.
On M939/A1 series vehicles, turn dipstick (4) handle counterclockwise to release from dipstick tube (3).
Pull dipstick (4) from dipstick tube (3).
Wipe dipstick (4) clean and return to dipstick tube (3).
Slowly pull dipstick (4) from dipstick tube (3) and read level.