MAINTENANCE MANUAL
SAVANNAH S
Doc. No.:
MM-SVNH-EN
Revision:
07
Rev. Date:
07/11/2022
Proj. Ref.:
SVNH S
A/C:
Savannah S
Applies to Generic Serial Number:
yy-mm-54-xxxx
Page:
107/132
DOC
FMM00
To bleed the system, remove totally the oil or part of it, then add the new oil from the lower draining
screw and monitor the level rising in the pump tank (its larger section). The oil level need not to be
higher than half of pump tank area, which is approximately 20 [mm] from the top corner of the pump
(ref.
).
The level can be monitored by removing the screw of the cup on top of brake pump; then install
again the screw.
After bleeding, verify that in the lines there is no presence of bubbles major than 15 [mm] of length.
If major, blead again the system.
Figure 47: Brake pump (seen horizontally, not vertically like the airplane installation)
7.5.1. Brakes oil pumps acceptable leaking
Description relative to the maintenance program, especially for the Daily pre-flight check.
The brake oil pump has the oil tank in its upper part, where the section is larger. The cup is just
pressed and is not provided a perfect sealing, therefore it is possible to see a very small amount of
oil over the cup, especially near the external seeger. The presence of oil is acceptable only if is not
in such a quantity that can drop in the aircraft floor. If too much leaking is evaluated, clean the parts
and purge the oil pump, removing the excess of oil. Verify the screw of the cup on top of brake pump
tank is closed, eventually with sealing glue.
7.6. Brake pads change
Replace the brake pads when the residual thickness of the braking material is 3 [mm] thickness. Do
not overpass this limit of consumption because the cylinder could lose oil.
To replace the brake pads, unscrew the brake caliper 4 support screw, replace the pads, and then
re-install the brake caliper with its screw, locking nuts and bushings. When installing the caliper
bushings, lubricate with white grease paying attention to not touch the disc or pads. Always verify
the oil level and eventual presence of bubbles in the lines when replacing pads.
Oil tank section
of the pump
Oil level
