Fluid Capacities; Fluid Grades; Ground Handling; Moving - WACO YMF F5 Series Maintenance Manual

LENGTH (OVERALL)
HEIGHT (OVERALL)
5.2.3

FLUID CAPACITIES:

FUEL SYSTEM:
All models have a standard fuel system capacity of 48 US Gal. (182 Litre) in two 24 gallon main tanks
located in the center wing section above the front cockpit. One or two optional 12 US Gal. (45 Litre) tanks
may be installed in the upper wings, one left or one right or both left and right, just outboard of the center
wing section. These are connected to and feed directly into the respective adjacent main fuel tank outlet
and cannot be individually selected.
ENGINE OIL SYSTEM:
The Jacobs engine is of the dry sump type with the lubricating oil being contained in a 4 (15 Litre) or 5 (19
Litre) gallon capacity tank mounted aft of the engine and forward of the firewall. The required engine oil
capacity is established by regulation depending on fuel capacity. Airplanes equipped with a standard 48
gallon fuel system may have a 4 gallon oil tank and those with optional auxiliary fuel must have a 5 gallon
oil tank.
HYDRAULIC SYSTEM:
The hydraulic system of all models consists of a hydraulically operated toe brake system. The reservoir is
located on the left side of the engine firewall and has a capacity of approximately one pint.
5.2.4

FLUID GRADES:

FUEL (AVIATION):
All models require 80 Octane Aviation Gasoline minimum grade fuel.
ENGINE OIL:
All models require the use of only aviation grade engine oils, with or without
is recommended that AD type oil be used to reduce sludge buildup. Single grade or multi-grade oils may
be used. If single grade oil is used, the ambient temperature in which the engine will be operated should
be considered as follows:
Ground Temperature
Above 50 Deg. F (10 Deg. C)
50 Deg. F to 20 Deg. F (10 C to -5 C)
Below 20 Deg. F (-5 C)
In very hot ground conditions or if the inlet oil temperature frequently exceeds 185 Deg. F (85 C), Grade
120 Saybolt (SAE 60) should be used.
HYDRAULIC FLUID:
The hydraulic brake system in all models requires the use of Mil-H-5606 Hydraulic oil (Red) or equivalent.
5.3

GROUND HANDLING

5.3.1

MOVING:

Always disengage the tail wheel steering mechanism before attempting to move the airplane by hand or
by towing. This can be accomplished by moving the tail wheel steering control located on the left side of
the rear cockpit to the forward position.
To move the airplane it is recommended that a suitable tug or tow vehicle be used with a spreader type
tow bar attached to the tow rings provided on the inboard side of each main landing gear axel. An
acceptable alternate method would be the use of a tail wheel type towing device such as the
Dragger Dragger
enough to not come in contact with the rudder when connected, will securely engage the tail wheel or
strut without danger of unwanted disengagement and has the power needed to safely move a 3000
pound airplane considering the surface to be traversed. If no towing device or tug is available, the
airplane can be moved by hand by gripping the front inter-plane strut at its base near the leading edge of
the lower wing. It is recommended that two persons be used for moving by hand, one on each side, and,
if possible, a third person at the tail in front of the horizontal stabilizer gripping the stabilizer spar at the
base of the fin to assist in steering, taking care not to push against the fuselage, fin or stabilizer.
REVISION: H
RELEASED: 07/21/2017
WACO Classic Aircraft Corporation
YMF WACO F5 SERIES MAINTENANCE MANUAL
23 Ft. 10 In. (7.26M)
8 Ft. 6 In. (2.59M)
®
. In selecting a tail wheel towing device it is important to insure that it will be low
Page
Grade of Oil
100 Saybolt or SAE 50
80 Saybolt or SAE 40
65 Saybolt or SAE 30
8 33
of
ashless dispersant
Tail-
PART NO. YMFAMM-1
(AD). It