MAULE AIRCRAFT CORPORATION
MAINTENANCE MANUAL
FOR
M-4/C/S/T
17
Rev. B
4/13/16
LANDING GEAR, WHEELS AND BRAKES
MAIN LANDING GEAR
:
TOE-IN:
If ground handling of the airplane makes toe-in suspect, inspect main landing gear as
follows:
1. With airplane unloaded, jack-up airplane on one side and spin tire. If center groove runs
true, do same on other side. If not, mark tire, or both tires as needed, while spinning,
with black marker pen.
2. Support tail to level (flight attitude) with main tires on floor. Measure from the floor to
centerline of axle and using that dimension, measure up from floor on front of tire in cen-
ter and on back of tire and mark. Do same on other side.
3. Measure between grooves and/or mark(s) at height marks, across front and then rear.
The difference should be 0” to 1/4” toe-in for 7:00 tires and 0” to 3/8” toe-in for 8:50 tires.
LANDING GEAR SHOCK ABSORBER:
This gear is supported by two spring oil type oleo struts which must be full of oil at all times.
The oil may be checked by removing a 1/8” pipe plug at the top end of the strut. If oil is
needed for P/N 4015B oleo spring, use New Holland No.134 hydraulic oil or Ford Tractor No.
ESN-M2C134-D. 10W30 engine oil may also be used. For P/N 4161B oleo spring use API
GL-4 or GL-5 85W-140 gear oil.
DISASSEMBLY OF OLEO STRUT:
1.
To remove the strut, the weight must be taken off of the gear. The bolt at the top and
bottom can then be removed, freeing the strut. Higher strength top bolts are available to
eliminate bending from hard landings.
2.
Remove four (4) bolts at top of strut.
3.
Remove oil filter plug.
4.
Pull out cylinder head and spring assembly.
5.
To remove spring, take all nuts off of strut shaft and press piston upward to free bolts for
removal. Remove bolts, and piston will come out of end of shaft.
6. Replace worn parts, weak spring, etc. New replacement springs are stronger than the
original springs. The “O” ring on the strut shaft and on the cylinder head should be re-
placed at this time also.
