MacDon M155 Operator's Manual page 166

7.8.8.2 Changing Lubricant
Change gearbox lubricant after the first 50 hours,
and then at 500 hours as follows:
NOTE
The engine should be warm prior to
changing the oil.
a. Stop engine, and remove key.
b. Place a 1 U.S. gallon (4 liters) drain pan under the
gearbox.
c. Remove drain plug (C), and allow oil to completely
finish draining.
d. Install drain plug (C), and remove check plug (A).
Form 169563 / 169566 / 169568
MAINTENANCE AND SERVICING
A
C
e. Unscrew breather cap (B), and add lubricant. The
gearbox will require 2.2 U.S. quarts (2.1 liters).
Add sufficient lubricant until it slightly runs out of
hole (A).
Use SAE 75W-90 API Service Class GL-5, Fully
Synthetic Transmission Lubricant. SAEJ2360
preferred.
f. Install plugs (A) and (C).
g. Operate the engine at low idle, and check for
leaks at the check plug and drain plug.
164
B
Revision B